• ZTS MBT-1 can test more than 30 different battery types and gives meaningful, accurate readings.
• The ZTS Mini is an affordable and portable alternative. It tests 15 battery types.

The Details

Musicians, professional photographers, hobbyists, parents, and anyone else who is a frequent battery user should invest in a quality professional-grade battery tester. Be cautious of the slew of cheap Chinese battery testers available for sale on the internet. These products do not give an accurate reading, and instead will do little more than tell you whether or not your battery is dead.

Consider the Amprobe, the best selling battery tester on Amazon. It is available for $7, which sounds too good to be true because it is. As expected, it is flimsily constructed and gives iffy reports on rechargeable batteries. As many reviewers noted, it is only good at identifying dead batteries. Worse, it gives inaccurate battery readings and gives artificially high “good” readings on batteries that are on the precipice of death. That can cause unfortunate mix ups, like taking a battery “good” on charge to an important photo-shoot, only for the flash to die after a few snaps.

Luckily, ZTS makes a quality tester that gives a dependable reading. This battery tester is manufactured here in the United States and gives an accurate measurement in a very short period of time. Just place the battery on the nickel-plated brass contact and wait for the bar at the top to show what percentage charge the battery holds.

It tests almost every battery type, including NiMH, Lithium-Ion, Alkaline Lithium, Coin Cells, CR1620 Cells. It has a row of six LED testers that gives percentage reading of how much life the battery has left.

This is not a portable tester — it weighs over a pound and is 8 inches tall.

A Portable Option

If you want a professional quality battery tester that can fit in a purse or glove box, ZTS has the MINIMBT. The Mini is exactly half the MBT: half the size, it can test half the number of batteries (15), and is half the price.

The Mini tests 1.5v alkaline (AA, AAA, C, D, N), 1.2v NiMH/NiCd, 3v photo lithium, and 9v alkaline batteries.

• The best pair of binoculars is the Carl Zeiss Victory HT Binoculars. They are the brightest binoculars available, and sport a robust and ergonomic design. There is no better option for bird watchers and hunters.
• Nikon Monarch 5 offers a much more affordable yet comparable quality pair of binoculars.
• The best pair of compact binoculars for hikers and everyday use are Bushnell Legend Ultra HD.

The Details

Stellar improvement in binocular technology has leveled the optical playing field. Specialty brands such as Swarvorski and Zeiss still have an edge over their lower priced competitors, but the gap has narrowed enough that you can comfortably purchase a mid-range option without losing much in the way of clarity, color, durability, and ergonomic design.

There are a few important considerations to weigh when picking out a pair of binoculars, and what option is best for you depends on whether you will be gazing at stars or birds.

The optical specification of a pair of binoculars is represented by a number that looks like a basic multiplication equation. 8×42 and 10×42 are the standard binocular specifications, and are the numbers that are best for general purpose use.The first number, which is invariably the smaller of the two, refers to the magnification power of the binoculars. It represents how many times larger the object will appear through the lens than it would to the naked eye.

The second number is the objective lens diameter, which is the larger piece of glass at the front of the binoculars. Objective lens diameter determines how much light is let in. The larger the lens diameter, the more light is let in. Photographers can think of it like aperture on a camera lens. A larger lens also means the binoculars will be heavier, which might compromise how long you are able to hold them steady. Increasing upper arm strength is a great solution to this problem, and will allow you to hold a pair of binoculars for longer while enjoying more light.

Field of View

The field of view is determined by the size of the eye piece and represented in degrees. Therefore, a 7.0 degree field of view would be 7 out of a 360 degree circle.  Wide angle are 7 or more degrees, while standard binoculars are around 5 degrees.

As magnification goes up, the field of view goes down. Birders will sacrifice some field of view for increased magnification. If you want to take in scenic panoramas, opt for a wide angle lens.

Other Factors To Consider

Get a pair of binoculars with a long eye relief if you wear glasses. Eye relief is the vertical distance to which your eye is supposed to sit, and is measured in millimeters. 13-15mm is considered a long eye relief, and the minimum a bespectacled individual would want to comfortably use the binoculars.

Reactual readers will also want to take note of the lens coating. The objective lens will be protected by an anti-reflective coating to minimize glare when light hits the surface. Fully multi-coated lenses are the best for performance and durability, as they enhance clarity, maintain integrity of color, and protect the lens from scratch and other damage.

We also highly recommend you choose a pair of binoculars that is waterproof or, at the very least, water-resistant. Even if you don’t plan to use your binoculars by water, fog and moisture in the air could potentially damage your pair.

Zeiss Victory HT: The Best Binoculars For Hunters and Birders

If you have the money to spare, there is no better pair of binoculars available than Zeiss Victory HT. The manufacturer is a specialty optics company with more than 200 years of binocular manufacturing expertise, and the Victory HT are engineered with precision to deliver the brightest color and most ergonomic design of any pair of binoculars. Released in 2012, Victory HT are made in Germany with the best products and most advanced technology.

They are the brightest premium binoculars in the world. They are the highest contrast and deliver more than 95% light transmission, 5% higher than other premium binoculars on the market. This jump is thanks to the new Schott High Transmission glass, which is exclusive to Zeiss. Schott has been developing special optical glass for more than 125 years, and their HT glass has the highest transmittance levels of any optical lens. This cuts down on a phenomenon known as “thermal lensing effect” and increases blue spectral range, which is particularly helpful in low-light situations.

Hunters and birdwatchers benefit most from the extra color in low light situations, as the HT glass makes the most of deep twilight. The lenses are protected by anti-fogging material which keeps them clear in the early morning cold. The extra color is still noticeable in general daytime use, but the difference is not as drastic as in dim or low-light viewing. If you plan to use your binoculars in daytime, the extra price tag is probably not worth the incremental improvement in color crispness.

The ingenious design of the Zeiss Victory HT sets it apart from competitors. It has a compact bridge and a large easy-to-use focus wheel. The comfort grip system allows you to grasp both optical tubes without a hinge in front of binoculars, and a long eye relief provides a comfortable viewing experience for those with and without glasses. It also has a double hinge feature which increases durability by minimizing the chance of breaking and a robust chassis that is made from lightweight magnesium.

The biggest drawback of the Zeiss Victory HT is obviously the price. Some commenters noted that other premium priced binoculars come with better kit (case, cleaning cloth). The lifetime warranty and 5 year no fault policy do provide some peace of mind for dropping so much on a pair of binoculars.

Zeiss also offers the Victory HT in 10×42, which gives you stronger magnification at the expense of a few degrees in field of view. Another option is the 10×54 version of the Victory HT, which Zeiss launched in 2014. Much lighter than other models with such a large objective lens diameter, this option is great for stargazers and deer hunters who need to make the most of nearly non-existent light.

Another Option For Bird Watching: Nikon Monarch 5

If you are willing to sacrifice color quality, Nikon’s Monarch 5 Series offers near identical image quality for a fraction of the price. It is a mid-level binocular with multi-coated Nikon ED (extra-low dispersion) lens that delivers sharp, high-contrast views. The ED Glass lenses and Dielectric High-Reflective Multilayer Prism Coating were previously reserved for Nikon’s more expensive models, but are available in the Monarch 5 series.

They have a 6.4 degree field of view, and maintain image sharpness outside of a 5 degree diameter up to 80%.

The exceptional design of Monarch 5 is durable and intuitive. It is very light, though not as light as Zeiss (21 oz versus 16 oz). The focus knobs are precise and smooth, very easy to adjust and find the best clarity. We appreciate the fully waterproofed rubber armored fog proof housing, which make this a durable and comfortable pair of binoculars to hold.

One complaint Monarch 5 owners have is that the lens cap is loose fitting, which leads to many lost caps. Nikon assures that this was an intentional design choice, but it nonetheless leads to problems.

 Best Compact Binoculars For Everyday Use: Bushnell Legend Ultra HD

Compact binoculars are lightweight and portable, perfect for hiking and general use while travelling. Any pair with an objective lens diameter smaller than 30mm is considered to be compact.

Bushnell Legend Ultra HD offers stunning HD image, thanks to ED Prime Glass. They are coated with anti-reflective lens and are secured in a lightweight magnesium chassis that is waterproof and fogproof. 

The Details

Tower air filters, frequently using HEPA technology, are designed to reduce exposure to indoor irritants and allergens such as dust, cigarette smoke, pollen, pet dander, mold and mildew spores and other particulate matter. Effective air filtration is especially important for those with allergies or respiratory problems such as asthma. Studies show that those who suffer allergies are often sensitive to multiple allergens, making it nearly impossible to remove environmental triggers without the use of technology such as air filters using the HEPA technology.

HEPA (high-efficiency particulate air) filters work by forcing air through a fine mesh designed to trap particulate that can escape standard filters found on HVAC systems. Many tower air filters contain a HEPA filter, and as air is pulled into the tower by a fan, it is pulled through the filter where particulate is trapped and then clean air is forced back out. HEPA filters are remarkably effective at eliminating environmental irritants, capturing 99.9% of airborne impurities 0.3 microns in diameter, or larger.

Consider the air change rate (ACH), which defines how many times the portable air filter will clean an entire room’s air during one hour. An ACH of 5, for example, indicates the air will be cleaned every 12 minutes.

Another factor to consider is the CADR ratings, which is the clean air delivery rate. This identifies how powerful a tower air filter is. CADR indicates how many cubic feet of air the unit can filter in one minute. You may see ratings for CADR related to irritants such as dust, pollen and smoke on the tower air filter’s packaging. Look for higher numbers if you have a large space, or consider purchasing more than one tower air filter. Here are the best standalone air filters.

The Best Overall Stand-Alone Air Filter: RxAIR Plus

For most people, a stand-alone air filter is a convenient way to cut down on air pollution and minimize annoying affects of allergies. For others, an air filter is a literal lifesaver, killing airborne bacteria and viruses. If you have a weak immune system, go with RxAIR Plus, an air purifier trusted by hospitals around the world.

This high end air purifier harnesses the germicidal ultraviolet light (UV-C) to clean the air as well as germs and viruses ranging from H1N1, TB, and the flu. In addition to a 99% elimination of airborne bacteria and viruses in a space of up to 800 sq. ft, the RxAir uses a system of traps and baffles to catch large particles such as pet dander and dust.

The unit comes with a 5 year warranty that places cartridge replacement. Replacement cartridges are available to keep the machine running at max efficiency even after 5 years. The RxAir Plus comes with a whisper-quiet fan that allows it to purify the air without causing a lot of disturbance, and you don’t have to worry about changing out the filters.

The Best Stand-Alone Air Filter For Value: GermGuardian True HEPA AC4825

This best-selling unit is an all-around good value, offering true HEPA filtration, a charcoal filter to reduce common odors, and UV-C light technology to kill bacteria and germs. The unit is Energy Star qualified, meaning it meets the strict energy efficiency guidelines set by the US EPA.

Air cycles through three stages to ensure maximum effectiveness. First, air is filtered through a pre-filter and charcoal filter to capture large particles and remove odors. Then, air is filtered through the HEPA filter, capturing 99.97% of airborne particles larger than 0.3 microns. In the last stage, UV-C light kills airborne viruses and bacteria, and titanium dioxide destroys the molecules that cause odors. Common viruses and bacteria that can be killed by the UV-C light stage includes rhinovirus, E. coli and streptococcus, responsible for millions of illnesses each year.

One downside is that it does require an air filter change every 7 months. The GermGuardian tower air filter includes an indicator light that blinks when it’s time to replace the filter or bulb.

The Best Compact Stand-Alone Air Filter: Honeywell QuietClean Compact Tower Air Purifier

The compact Honeywell QuietClean weighs just 1 pound, is 12.6 x 17.8 x 10.5 inches, and has a built-in handle, making it easily transportable and ideally suited for any tight space, including a nightstand, table or you can place it on the floor. It is whisper quiet, has two speed settings that can be set via an easy control knob on the top of the unit, and a permanent, washable iFD filter.

IFD (intense field dielectric) filters are a honeycomb of hollow air channels with floors and ceilings alternately charged or grounded via embedded electrodes to create a powerful, polarized electrical field inside the air channels which can trap 99.99% of particulate matter 0.3 microns or larger, including virtually all viruses, bacteria and spores. The iFD filter can be removed from the unit, easily washed with water and reused, so it never needs replacing.

The Honeywell QuietClean has a CADR rating of 40, meaning it can filter 40 cubit feet of air per minute, ideal for smaller rooms up to 62 square feet. The energy efficient design requires only as much electricity as a small light bulb to run, reducing your energy costs as compared to many other models. Air is effectively filtered through the unit 5 times per hour.

The Best Standalone Air Filter For Allergies: Honeywell True HEPA Allergen Remover

The Honeywell True HEPA Allergen Remover tower air filter is the number one recommended model by allergists, and the Honeywell brand is recommended by 7 out of 10 physicians who recommend the purchase of an air filter. This portable unit weighs just 21 pounds, making it simple to carry from room to room via built in handles on the sides. It can circulate the air in a 21’ x 22’ room up to 5 times per hour, and has a powerful CADR rating of 300, meaning it can clean up to 300 cubic feet of air per minute. There is an activated carbon pre-filter to help reduce common household odors, such as those caused by pets or cooking.

The unit features easy tap electronic controls, 3 cleaning levels and a turbo clean setting. A timer can be set to shut off automatically after 2, 4 or 8 hours, and there are built in electronic filter replacement reminders. A light/LED dimmer control on the top of the unit makes it easy to determine the operating status even in the dark. This unit functions most efficiently in a medium to large sized room and includes a true HEPA filter, guaranteeing 99.97% of allergens and other irritating particulate will be removed from the indoor environment.

• The Best Waterproof Bluetooth Speaker: Ultimate Ears UE Boom 2
• The Best Bluetooth Speaker for Sound Quality: FUGOO
• The Best Indoor Bluetooth Speaker: Bose SoundLink Color

The Details

The Best Waterproof Bluetooth Speaker: Ultimate Ears UE Boom 2

Pros: Waterproof, rugged, great battery life, impressive sound, lightweight

Cons: playback controls occasionally unresponsive

A favorite pick of top tech magazines, the UE Boom 2 is a remake of the popular, original UE Boom.  Although just over 1 lb., the compact, cylindrical speaker projects a loud, clear sound with deep bass in all directions.  Unlike many delicate tech gadgets, these speakers were meant to be taken outside – the outer shell is resilient, rugged and made to withstand dings and dents.  It’s not just water-resistant – it’s waterproof – and can be submerged in over three feet of water for up to 30 minutes.  The rechargeable battery lasts an impressive 15 hours, perfect for a weekend camping trip with a group of friends.  The UE Boom 2 also offers a variety of other features, including the ability to sync with a second UE speaker for even more sound, intuitive app features, and a variety of color options to suit any style.

The UE Boom 2 is available at Amazon for around $200.

The Best Bluetooth Speaker for Sound Quality: FUGOO

Pros: Powerful sound, excellent battery life, durable design, customizable “jackets”

Cons:  Does not give visual cues on volume or battery life, changing jackets requires some dis-assembly

According to TechRadar, the FUGOO Bluetooth speaker is one of the industry’s best-kept secrets.  Although some high-end Bluetooth speakers from well-known brands, such as Bowers & Wilkins, Bang & Olufsen, Sony, Marshall Kilburn, and Bose, may boast of higher quality sound, many of these are not realistically portable, or likely to be used as portable speakers, due to their size, weight, and price tag.  However, the FUGOO is a true portable speaker at a little under 1.5 pounds, and includes a durable core and different exterior “jackets” depending on the purpose and environment.  Specifically, the core is itself a rugged machine capable of handling dings, dents, and spills.  The “style” jacket offers additional protection and a streamlined silhouette.  The “sport” and “tough” jackets offer additional protection.  The speaker sound is exceptional; music lovers will be astounded by the depth and clarity of the sound produced via its six drivers, including two tweeters, two mid/sub drivers, and two passive radiators.  The FUGOO also offers an unbelievable 40 hours of continuous battery life.

The FUGOO does have some small drawbacks.  Its streamlined, minimal visual design only indicates whether the machine is turned on or off.  All other cues are voice-activated, which means a simple glance to check the volume level or battery life is not possible.  Additionally, the jackets are not easily interchangeable.  Although the “style” jacket slides and locks in, the other jackets require a little more assembly; many reviews noted changing jackets was frustrating and somewhat confusing.

The FUGOO Bluetooth speaker is available on Amazon for $178 to $230, depending on jacket type.

The Details

Ultraviolet light is the preferred light source of TV crime scene investigators on the hunt for body fluids. Distinguished by its trademark purple glow, it has a wavelength that is shorter than visible light but longer than X-rays, in the range of 10 nanometers to 400 nanometers. It is useful to make fluorescent substances glow that can’t otherwise be seen by the naked eye. Portable UV light used to be too unwieldy and expensive for consumer purposes, but that all changed after ultraviolet light emitting LEDs were introduced in 2006. They are now widely available in flashlight form.

These flashlights are most often used to detect fraudulent documents such as fake IDs, see watermarks, read invisible ink or investigate crime scenes. They can also be used to “fluoresce” scorpions and certain types of minerals, and charge “glow-in-the-dark” object like fishing lures. Use them to protect your businesses from counterfeit money and your home from pointy tailed pests.

Gallium Indium Nitride UV Flashlight

This Gallium Indium Nitride UV flashlight gets great ratings from Amazon buyers, so we thought we’d include it here. Reviewers were impressed by the flashlight’s durability, and the fact that it emits 365 nm UV light, which is at the very edge of our visible range. The light from this flashlight appears as a dim purple-blue to the eye, but when it shines on items that fluoresce they light up brightly.

It uses three AAA batteries — we recommend using low self-discharge AAA rechargeable batteries like Eneloop Pros in this flashlight.

The best portable water filters available today are:

• The Sawyer Products Complete 4-Liter Filtration System. Filters down to 0.1 microns. This includes almost all pathogens, except certain viruses. It costs about $180.
• The Katadyn Pocket Water Microfilter. Filters down to 0.2 microns. It costs about $340.

Another reliable method of killing all pathogens in water is using chlorine dioxide tablets, such as Katadyn Micropur Purification Tablets.

The Details

Portable filters are designed primarily to remove pathogens from outdoor water. Some units also include carbon filters to reduce VOCs and toxic metals in the water.

These are the three type of pathogens you want to remove from wilderness water:

Protozoan Cysts (Cryptosporidium parvum, Giardia lamblia)

Size: 1 – 20 microns

Type of filtration needed to remove: Micro-filtration, ozonation or reverse osmosis, UV (ultraviolet light)

Bacteria (E. coli, Salmonella, Campylobacter jejuni, Yersinia entercolitica, Leptospira interrogans, etc.)

Size: 0.1 – 10 microns

Type of filtration needed to remove: Micro-filtration needed, ozonation or reverse osmosis, UV (ultraviolet light)

Viruses (hepatitis A, rotavirus, enterovirus, norovirus, Norwalk virus)

Size: 0.025 – 0.1 microns (25 nanometers to 100 nanometers)

Type of filtration needed to remove: Ultra-filtration needed – ozonation or reverse osmosis, UV (ultraviolet light)

Notes On Pathogens

• Pesticides, herbicides and other toxins and pollutants associated with agriculture and urban development do not normally impact water sources found deep in wilderness areas
• Viruses are rarely encountered in North American wilderness waters
• Bacteria (including beneficial bacteria) is naturally present in surface water
• Protozoan cysts and viruses are found in water contaminated by animal or human waste (principally feces)

The Best Portable Water Filter: Katadyn Pocket Water Microfilter

The Katadyn is a dependable filter which has been used by back country hikers for many years. The filtration member is rated at 0.2 microns.  The silver-impregnated ceramic element is effective against bacteria and protozoa, and it will filter 50,000 liters (13,000 gallons) before a replacement is needed.

The Katadyn Pocket Water Microfilter is available from Amazon for about $340.

Another Alternative: Sawyer Products Complete 4-Liter Filtration System

The Sawyer Filtration System is an excellent kit, that filters down to 0.02 microns, using a hollow fiber membrane. That’s almost on par with the Lifesaver, with it’s 0.015 micron filtration. Thus, the Sawyer can filter out most pathogen, including viruses.

What’s great about this system is that it almost never needs a replacement filter. The manufacturer has a guarantee that it will filter one million gallons before replacement. However, long-time users report the water reservoir bags need replacing after a couple of years.

The Sawyer System is gravity-fed, and allows you to purify 4 liters of water in about 10 minutes.

The Sawyer Products Complete 4-Liter Filtration System is available from Amazon for about $180.

Chlorine Dioxide Tablets

Chlorine dioxide tablets are a good choice for water purification. They will destroy all pathogen in water. Also, they leave no taste in the water (unlike iodine tablets). Like all water treatment tablets, these take 15 minutes to destroy viruses and bacteria, 30 minutes to destroy Giardia, and 4 hours to destroy Cryptosporidium.

I recommend the Katadyn Micropur MP1 Purification Tablets. This is only tablets registered with the EPA.

Boiling Water

You can boil water for one minute to destroy all pathogens. It is a foolproof treatment method. Only one minute of boiling is required. The most heat-resistant pathogen out there is the virus hepatitis A. Even hepatitis is believed to die in less than one minute in water heated to 98°C/208°F. It is because of hepatitis A (or maybe just tradition) that some health organizations and wilderness rangers persist in recommending at least 1 minute of boiling time to purify water, and 3 minutes at higher elevations.

Here are some reliable speaker dock that still allow you to dock your iPad and immediately play your music:

Sony RDPXF300IPN Lightning iPad Dock

The Sony RDPXF300IPN Lightning iPad Dock is the best sounding speaker dock I’ve tested. The two speakers output 20 watts each, and have a rich and bright sound. In fact, this dock sounds better than the Bose SoundDock Series III (which also lacks bluetooth connectivity and a remote control).

This dock has an internal lithium-ion battery so it can be used as a portable player, it also features a radio and a remote control.

The Sony RDPXF300IPN Lightning iPad Dock is available from Amazon for about $300.

iHome iDL48BC Dual Charging Portable Rechargeable Speaker

The iHome iDL48BC speaker dock is a good budget choice for a speaker dock. It delivers resasonably good sound, but it lacks some of the clarity and bass of the Sony RDPXF300IPN.

The iHome iDL48BC is available from Amazon for about $80.

The world’s thinnest tablet in the “mini” category, the Samsung Galaxy Tab S2, runs Android 5.0 (Lollipop) OS and has a 2048 x 1536 screen resolution. Its Quad 1.9GHz Intel processor and 32 GB Flash Memory makes it a capable machine for browsing the internet and for running apps from the Google Play Store.

The AMOLED display delivers the vibrant, lifelike colors with deep contrast and rich display that consumers have come to expect from Samsung’s flagship line of portable electronics. The Galaxy S2’s rear-facing 8-megapixel camera takes reasonably good pictures, although your phone likely has a better camera. Its battery life also leaves something to be desired. The battery lasts six hours on average.

The Galaxy’s most attractive feature is, of course, its svelte figure. At .22,” it is even thinner than the iPad Air 2. Other perks such as Samsung’s exclusive Smart Switch software and fingerprint scanning round out the tablet.

Samsung also offers a 9.7” edition of the Galaxy Tab S2.

The Thinnest Tablet Running Windows: Toshiba dynaPad

While the Android OS is fine for entertainment purposes, you will want a tablet with Windows OS if you intend to do serious work on your tablet. Think of the Galaxy Tab as an over-sized smartphone and of the dynaPad as an undersized laptop.

The dynaPad packs much more impressive hardware in its extra .05” of thickness. It runs the powerful Intel Atom CPU and has 4GB of RAM and 65GB of internal storage. Engadget writes:

“The 1.28-pound tablet feels at once luxuriously light and reassuringly well-built. The secret ingredient is a carbon fiber frame that’s coated in a soft, rubbery paint that makes the device easier to grip than a big-screen tablet ought to be. It also helps that the device has a mix of rounded corners and flat, slightly chamfered edges.”

It has Gorilla glass screen, which is resistant to scratches and cracks, and a sturdy carbon-fiber frame. The dynaPad’s durability is a great asset for an ultrathin tablet, because it doesn’t require a bulky case for protection.

The dynaPad is now available for pre-order and will be sold online and in Windows stores later this month.