2 Pack 3.7 Volt 18650 Rechargeable Battery 3400mAh 18650 Li-ion Battery for Flashlights, Headlamps, Doorbells, RC Cars (Flat Top)

Like the title said, these batteries are a must have! The reason why I chose to buy these batteries is because the ones that came with my outdoor motion detectors only lasted maybe 4-5 hours before before it drained up. These batteries? First, it's the same size as the OEM, it's rated at 3000mah which is nearly twice as much juice as the OEM battery and lasted all night and then some. For the cost, it's an absolute bargain. The fact that it's a rechargable battery means I can reuse it over and over which is in my opinion very important when it comes to waste. Overall, fantastic set of rechargeable battery and I will gladly buy them again for my other motion detectors.

Cheaper than most and lasting longer than the ones that came with the flashlight I’m replacing. Will buy more as back up. Just like any rechargeable battery, it will eventually die and no longer hold a charge. Have cheap extras is a must.

Arrived quickly

Good power to run the neck fan. Charged up well.

Why would I buy batteries and have them sent to me on Amazon and pay for them and they come and they’re not fully charged they’re not charged at allSo since they’re not charged at all, I have no idea if they’re going to work or notI might have to just send them back if they don’t work I have to charge them first. That is totally stupid. I bought them because I thought they were already charged.

Was surprised that these where what I needed. Value. Priced right and work great

Both batteries seemed to take the full charge well and both seem to give very good length of service before needing recharge. Have not had these very long though.

Even though the product says it works in flashlights. they do not. I started to return them, but decided to see if I could get them to work. No matter what I tried they would not charge up inside the flashlight like my older 18650 batterys do, I checked contacts and made sure the had contact (they did) so left them charging for the day in both flashlights, the one flashlight charge indicator flashed on and off as if it was charging but never stayed on to show it was charged, the other flashlight indicator stayed lit but never turned blue to show it was charged, the size of these batterys 18650 are just a tad shorter than the 18650 ones that came with my flashlights, however the spring still made contact in both flashlights, I would not purchase these again and will not be using these I already have, will have to drop them off at the local store that take batterys for disposal. They should have charged as they made contact, they simply did not work.