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KeepPower
KeepPower 18650 cells are the rechargeable batteries a lot of thermal owners run, and we also stock KeepPower batteries in the larger 21700 and compact 16340 sizes. Every cell here is protected, which means a small circuit guards against overcharge, over-discharge and shorts.
Which KeepPower cell fits your gear
The 18650 3500mAh protected button top comes as a pair and suits many thermal scopes, monoculars and IR lights that take 18650s. For cold-weather hunts there is also a low temperature KeepPower 18650 battery, the same 3500mAh protected cell built to keep giving power when the thermometer drops on a January coyote sit.
The 21700 6000mAh 3.7V pair is the bigger cell. If your device takes 21700s, the extra capacity means more hours between charges.
The 16340 950mAh RCR123A is a protected, rechargeable stand-in for CR123A cells in lights and sights that accept 3.7V rechargeables. Check your manual first, since not every CR123A device can handle the higher voltage.
Button tops make contact in more devices than flat tops. Find other brands in our 18650 batteries and 21700 batteries sections. Batteries can't be returned, so confirm the size before ordering.
Frequently Asked Questions
What type of battery is an 18650 battery?
It is a rechargeable lithium-ion cylinder cell, 18mm wide and 65mm long, which is where the name comes from. Most run at 3.6 to 3.7 volts nominal. The KeepPower 18650s we carry add a protection circuit and a button top, so they fit and run safely in more thermal and IR devices.
Where is the best place to buy 18650 batteries?
Buy them from a seller who knows the devices they go into. Fake and relabeled 18650s with inflated ratings are common online. We stock KeepPower protected cells, ship free to US addresses, and real people on the phone can tell you which cell your thermal or IR light needs.
How long do 18650 cells last?
A good 18650 lasts for hundreds of charge cycles before its capacity drops off noticeably. Heat, deep discharges and leaving cells dead for months shorten that. Store KeepPower cells partly charged in a cool place, and retire any cell that runs your optic for much less time than it used to.
Is there a 4000mAh 18650 battery?
Some brands sell 18650s rated around that, but be careful with high claims from unknown sellers. The KeepPower 18650s we carry are rated at 3500mAh, in both the standard and low temperature versions. If you need more runtime and your device accepts it, the KeepPower 21700 is rated at 6000mAh.
