14500 Rechargeable Battery 2500mAh 3.7V Li-ion Batteries Button Top 4 Pack for Headlamp Flashlight

If you need these, these batteries are a good option.Till now, I had a hard time finding 14500 3.7 volt batteries for my flashlight. My NICRON N7 LED flashlight can use regular 1.2 volt AA batteries but if you can find them, it lights up far brighter with 3.7 volt 14500s.These batteries work well and so far, appear to provide solid decent service for both my flashlight and my radio that takes this size battery. These are a good value and I feel I got exactly what i wanted and what I paid for. They are easily and fully charged in my 5 year old battery charger. However, lucky for me, that charger was made and sold as a universal Smart Charger for rechargeable batteries Ni-MH Ni-Cd AA AAA C Li-ion, 18650 14500 16340 18500. If you have a similar smart charger you are golden. Otherwise, you may have to upgrade your charger if you have a "dumb" standard AA Ni-Cad or NiMH unit. There are lots available on Amazon.Please be warned, these batteries are the same size and shape as regular AA batteries. You do not want to put them in or expect them to charge in any device that is not made to handle the triple (3x) voltage power these batteries put out. I am happy. I hope you will be too. Just know what you are buying and what to do with them when you get 'em.

I am a big fan of energy storage capabilities of these Li-ion cells, use them over & over again! Durable, fits same charger unit as my 18650 cells.

These 14500s do not meet the specified capacity. They are so bad they are worthless.TL;DR: after several cycles only one of the four tests above 400mAh. For the first charge then discharge they were near 800mAh but with each cycle the capacity is diminishing. They are garbage.I've put these cells thru several cycles using my Opus 3100. At first I put them in to charge at 500mA, which is 1/5 (or C/5) the specified Capacity of 2500mAh. The cells started getting more warm than typical so I figured the cells were actually 800mAh, the typical capacity of 14500 cells. This meant I needed to reduce my charge current to 200mA, the smallest available on the Opus charger. This is a C/4 rate, which is still quite conservative for lithium cells like these.After the first charge and discharge cycle, the Opus reported a capacity in the high 700mAh for each cell. That wasn't great, but sometimes the cells need a couple of cycles to "wake them up." I started another cycle at 200mA. After that cycle one of the cells didn't reach 700mAh and the other three were less than 750mAh.I did another cycle, and another, and another... I've now done several cycles. Every cycle the capacity dropped so now I'm able to do many cycles every days. The charger is operating properly and other cells are still testing as expected. Manually charging one of these cells with the variable power supply and discharging it with a D.C. load reports about the same capacity as the Opus.The cells are now all producing less than 450mAh with only one over 400mAh. That's worthless.These cells are going into my e-waste bin for the next trip to the hazardous waste collection site.

I bought these for the guys in my band to use in their in ear monitors. They have saved so much money on batteries, and these last through every show.

I only need one battery in my soap dispenser. I soldered it in, charged it and it has gone a couple of weeks, so far, on the same charge

Fast delivery! Holds charge!

good batteries but the capacity is little low, works great but runs out of charge fast. A double AA last longer with the same load

Excellent batteries!