2X Nitecore IMR 18350 NI18350A 700mAh 3.7V Button Top Rechargeable Battery (This is NOT a Replacement for CR123A)

Fantastic batteries

They work way better than the original battery that came in my Sangean solar crank radio. Just know they will not charge a cell phone from the usb port in the radio. Only the crank will.

Good.

I purchased these batteries to replace a bad battery in my pocket sized flashlight. These work better than the OEM batteries. They hold a charge longer and have already lasted longer than the original battery. I'm well pleased with these.

Great battery but be careful. My ec11 sometimes turns on in the holster and I don't notice till the battery is drained. It read 2.2 volts. My super charger would not charge it. Seems if it goes below 3 volts it is officially dead. Wow.I let the battery sit for 1 week, then tried again. It took a charge and came back to full charge. So don't give up if you drain it dead. Nitecore stuff works.

These batteries go into a handheld device which requires small-size battery.At all times, I have one battery in an external battery charger, another being used in the device.Each battery gets 2-3 charge cycles a day and can go for 2 years with such use.Very impressed with the reliability of this brand. This is the third pair of batteries I buy from them.

This is absolutely the worst batteries you can get. Batteries won’t charge after I used them once after it drained from full charge to zero. Two weeks!

If your device has a bit of tolerance for width and length, these are by far the best option.