• EBL 3.7V Li-ion Rechargeable Batteries — 3000 mAh
• Kiminors 3.7V 18650 Rechargeable Battery — 3200 mAh

Our recommended 18650 battery charger: XTAR VC2

About 18650 Batteries

What are the advantages of 18650 batteries? They are 3.7-volt lithium-ion batteries that can be recharged and are compatible with a wide range of electronics, including laptops, digital cameras, flashlights, and even electric car batteries.

Panasonic, Sanyo, Samsung, and LG are the top level 18650 cell manufacturers, making long lasting cells in a standard size (18 mm by 65 mm) that fits all 18650 compatible devices. Chinese knockoffs are available for cheaper but are prone to shorter lifespans and aren’t always uniform in size. As a rule, be wary of “protected” 18650 batteries, which have small circuit boards at the bottom that do not fit some electronics, such as flashlights.

High-drain batteries are safer and designed for high current devices, such as vaporizers. They are also less wasteful, meaning they have a longer life cycle and can last for more recharges.

18650 Battery Chargers

The best part about 18650 batteries is that they can be recharged. That means you will need a reliable charger to keep them energized and in working order. I like the XTAR VC2 charger because it has an informative LCD screen display.

The LCD screen tells you the real mAh capacity of your batteries, so you can make sure they are getting the advertised amount of fill or identify when they are losing efficiency.

The post The Best 18650 Batteries appeared first on Reactual.

Yes, they are finally available. However, only a few Chinese companies manufacture them. These batteries are AA and AAA rechargeable lithium polymer batteries that output 1.5 volts.

• Tenavolt Lithium-Ion AA Batteries (2775 mWh)
• Deeleepow Lithium-Ion AA Batteries (3400mWh)

Lithium-ion batteries normally operate at 3.7V per cell. The circuitry inside the cells reduces the voltage to 1.5 volts. The batteries have a capacity of 3400mWh, which matches Eneloop Pro (NiMH batteries with the highest capacity). Additionally, lithium-ion cells are lighter than NiMH cells.

Other Lithium-Ion Rechargeables

There are also some lithium-ion rechargeable batteries made for high-performance flashlights and cameras in these sizes: 18650 and CR123.

A single 18650 battery can replace two CR123A batteries, although at a lower voltage (but much higher amperage). However, the 18650 is a wider cell and will not fit into a flashlight designed strictly for the narrower CR123As. Most modern tactical LED lights are designed to use a single 18650 or two CR123As, but it’s best to check before buying. See our article on The Best 18650 Batteries for more information.

There are also numerous other types of lithium-ion batteries made for specific laptops and other electronic gadgets. There is currently no standard size for these lithium-ion cells.

The post Do Rechargeable Lithium-Ion AA Batteries Exist? appeared first on Reactual.

• Kentli makes the best rechargeable lithium-ion AA batteries currently available. They are rated at 2800mWh, and are the only 1.5 V li-on AA batteries, making them the best choice for consumer-grade electronics.
• EXCELLENT makes 3.7V li-on batteries compatible with high drain devices like LED flashlights.

The Details

Not long ago, disposable alkaline batteries enjoyed an undisputed mastery of the AA battery market. Improvements in rechargeable battery technology upended that dominance over the past decade. As we reported in this article, Nickel-Metal Hydride (NiMH) AA batteries such as Panasonic’s Eneloop have made rechargeable options more cost-efficient in the past 10 years.

A 1.5V lithium ion battery has recently been made available to consumers. Lithium ion cells have a high energy density, long cycle life, and have a lower self discharge rate than NiMH batteries. In other words, they last longer and maintain a more even voltage than other types of cells.

Kenli’s 1.5V offering is an ideal choice for everyday household needs. The batteries have the same voltage as a brand-new alkaline battery and won’t overpower devices that just need a stock battery.

2800mWh is a respectable capacity, equivalent to around 1866mAh. By comparison, the Eneloop Pro has a capacity of 2550mAh. Like most NiMH batteries, the eneloop pro is 1.2V.

This equation explains the difference between mWh and mAh:

miliWatt x Hour = Volts x miliAmpere x Hour or mWh = V x mAh. For more on the conversion process, read here.

Other Options

Higher voltage lithium-ion rechargeable batteries are made for high-performance flashlights and cameras, but they are not intended for use with many products. They are higher energy density and rated at 3.7V.

EXCELLENT is one company producing higher energy density lithium ion batteries. Their 18650 batteries have a 2600mAh capacity and high quality cells. They are 3.7V and great for UV or high powered LED flashlights that consume a lot of energy.

One word of warning too consumers: there is currently no standard size for these lithium-ion cells. Make sure to read the dimensions of each battery on Amazon before you buy to guarantee that they will fit in your device.

The post The Best Lithium-Ion AA Batteries appeared first on Reactual.