JESSPOW 4 Pack I865O 3.7 Volt Button Top Rechargeable Batteries,Lithium Battery 3300mAh for Flashlights, Headlamps, Doorbells, RC Cars,Outdoor Garden Lights

I have used so many different rechargeable batteries that just do not perform as described. There are many that over state the mAh's and do not last over 20 recharges until they start going weak in 15 minutes. These have surpassed my expectation's as I have never bought this brand before, but to my surprise these work GREAT. I waited until I used these for several weeks and they still are holding the charge when using them for a long time close to 1 hour on MAX Power on my headlamp set which to me is incredible. The one thing you have to get used to is the recharge time. They take longer than those Cheap-O's but that is to be expected on a True Quality Product. I will buy more as needed That's A Fact Jack...

these are great batteries. they arrive at about 50 percent charge; I do like this as it's the best state to store a lipo is at 50 percent charge. the first pic is a charge right out of the box showing they took about 50 percent charge. the second pic shows a full discharge cycle down to 2.99 volts. the third pic shows a full recharge after that discharge. ran this test 8 times and it was very consistent. these are true 3000 to 3300 Mah Batteries. I will be buying many more. So Many Batteries claim capacities they come nowhere near close to, Jesspow Batteries are the exclusion, great batteries

Good product

I decided to try these for flashlight use since the previous vendor I use doesn't seem to exist anymore (those batteries have served me well since 2018).First off, beware of any vendor with ridiculous capacity claims. Also there are lots of horror stories of subpar rechargeable batteries when purchased on line.These batteries have a claimed capacity of 3300 mAh. After complete charge (they arrive at around 50% charged, ideal state of charge for storage) the were all in the 3100 to 3200 mAh range and stayed cool during charging. After a few charging cycles I'm sure they'll be up around the 3300 mAh range.I definitely recommend these.

Not bad. Average battery longevity.

I'm trying to find some quality 18650 batteries for my headlamp.These appear to be quality batteries, based on the reviews and their heft compared to the batteries that generally come with flashlights and headlamps.However, they are a little too big--they don't fit in my headlamp's battery compartment. I've run into this before, generally the batteries are too long, as though the manufacturer slapped a button on a flat-top battery. Not the case with these, they're simply too wide. About 0.5mm, according to my calipers.A bit flabbergasted that there's so little extra clearance, but at the end of the day, batteries made to the 18650 spec fit, and these don't.

Purchased these along with the other comparable brand names and one of the best smart chargers as I plan to use these more often. After the initial charge I immediately tested a brand name with these in the same exact headlamp. Both lasted far longer than any other 18650 battery I have dealt with and these outlasted the all brand names by a significant % (20% if I had to guess). These are comparable in price to the brand name when purchased in a single pair which is the only option for the brands but these can be purchased in volume making them far superior in both performance and price. I HIGHLY RECOMMEND these batteries!

I needed new batteries for my LED flashlights. I opted for these, as they are reasonably priced and did not advertise a ridiculous capacity limit. I performed a capacity test on each of the batteries, and although they did not yield a 3300 mAh rating, all 4 batteries tested somewhere between 3000 and 3100 mAh. I honestly would have been happy with anything above 2200 so these surpassed my expectations. So far they have been working great.