The Best Rechargeable C-Size Batteries of 2018

by Patrick Hyde •

Save big money on portable electronics with rechargeable batteries. Recent advances in battery technology allow batteries with a longer charger and overall lifespan, cutting down on money and saving space in the landfill.

The best rechargeable C-size battery of 2016 is SunLabz 5000 mAh.

The Details

Although they are no longer as popular as they used to be, C batteries are one of the most common alkaline batteries in use today. They have kept the same dimensions- 50 millimeters by 26.2 millimeters -since 1926, and are used in medium-drain electronics such as toys and instruments. Disposable 1.5V alkaline dominated the C battery market for years, due to their high capacity and long shelf life.


Rechargeable C-size batteries are rapidly gaining marketshare over their throw-away counterparts, thanks to crucial technological advances within the past decade. Instead of alkaline, they are using 1.2V Nickel-Metal Hydride Chemistry (NiMH) that allows for greater capacity that doesn’t atrophy after long stretches of inactivity. Whereas in the past rechargeable batteries would drain by themselves via discharge even when they weren’t in use, they now retain up to 85% of their charge capacity for months at a time. No more pulling out a rarely used flashlight the night before a camping trip, only to find that the charge has evaporated in your garage.

Of all the rechargeable batteries on the market, SunLabz offers the best C-size battery. Its 1.2V NiMH cells have a 5000mAh capacity, which is almost as much as the standard 8000mAh of disposable alkaline batteries and much higher than other NiMH cells, and close to the capacity of a lithium cell.

SunLabz are rated to recharge over 1000 times, more than making up for the lower capacity, and hold over 80% of their charge over the course of the year, thanks to a special low-discharge technology.


The Maximal Power FC999 Universal Charger is a reliable way to recharge C-size batteries quickly and efficiently. It can recharge up to 8 batteries at once, including alkaline, RAM, Ni-MH, Ni-CD, AA, AAA, C, D, and 9V models.

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