ON THE WAY®Charger and 4Pcs 14500 2000mAh 3.7V Li-ion Lithium Rechargeable Battery AA Batteries For Led Flashlight Torch(Blue)

I bought these as I have a project requiring 5V, and two of these in series would work great - especially that they are advertised as having a 2000mAH capacity.... WRONG! They are not nearly near 2000mAH. I first tested these batteries with a low-cost AccuPower IQ-338XL Charger-Tester, and they indicated around 500mAH capacity (503mAH actual). I then tested them a second time with my B&K/iTech8511+ Electronic Dummy Load using the Constant Current Battery Test feature. They tested slightly higher at 525mAH,I tested the batteries after performing several break-in charge/discharge cycles as is normal practice. I also used a C/1 discharge rate (200mA for these batteries) which is also the accepted norm.The batteries do work well for their intended purpose, but only have about 25% of their stated capacity.

I bought these in Jul 2017 and the first battery I charged up worked very well in a small flashlight I had. It lasted over a year (rarely used the flashlight) but when I charged it up again it didn't work. So I tried another of the batteries and same thing. I noticed the two remaining batteries had rust abound the positive side and of course wouldn't work (all batteries kept inside house). So I thought the flashlight had something broken and bought another flashlight but the batteries wouldn't work in it either! I was getting ready to return the flashlight to Amazon but decided to try the battery in my wife's flashlight that was working (different brand). It worked! So I tried it in my initial flashlight and her battery worked in it also. So I now have two flashlights and no batteries that work and had to buy some more rechargeable batteries. Either I'm extremely unlucky or these batteries are not worth buying!!

Great Nerf blaster batteries. The Nerf Stryfe and other flywheel blasters work great when three of these are installed. Fill the rest of the battery slots with blank cells. Use AA to C or D adapters for blasters requiring those batteries. Be warned, the blasters are not designed for the higher voltage and can be damaged with these batteries.

Gave these shot and they didn't work out. 1 of the batteries lasted only 1 day just sitting in a flashlight and went dead. When I went to recharge the battery it says that it is fully charged. So I'm down one battery. Trying the other ones out to see if I just got a bad battery or they all are no good and will return for a credit.Update: now 2 batteries are no go. Looks like they will be returned for credit. Look someplace else for batteries.

So far two (2) of the batteries have become non-working after three (3) cycles or charges. I use these alternately in a flashlight that gets general to mild use. This demonstrated by the time of purchase and my posting now. I currently would not recommend a purchase of this product.

Probably burned out my two thermometers which call for AA batteries (1.5 Volts). But these are 3.7 volts each; two in series are almost 8 volts. They may work for some things, but I'm afraid they made toast out of my two $30 thermometers.

Product only worked a little while and 2 of the batteries won't charge now at all. The green light is suppose to come on when batteries are fully charged but it never has.

All four charged and working great. Works nicely with my J5 tactical light thrower. Don't overcharge them, these batteries aren't meant to trickle charge. Better under than to over charge them. Do your homework before buying these types of batteries. The only work with products that take that type of voltage. 3.7 volts