26650 Rechargeable Battery, 6800mAh High Capacity 3.7v Lithium-ion Rechargeable Batteries for Flashlight Ect

returned because wrong size

Strike 1: The brand of battery advertised was “CBJJ”. The brand that was delivered was “GTL”. (See photo) I'm guessing that the seller considers them “generic”, but there is a considerable difference between brands in lithium batteries. Strike 2: The batteries are claimed to have protection against over-discharge, but I've found that they do not. They allowed discharge down to 2.5 volts and below, going past the safe discharge level. Strike 3: As received, one cell was almost fully charged at 3.8v or so. The other was almost fully discharged at 2.8v. I suspect that this one has a lot of internal leakage, making it difficult to use in a 2-cell pack, since it will hit its full discharge voltage first, and given the lack of protection, make the pair unreliable. Strike 4: The stated capacity is 6800mAH, but the measured capacity was a little less than 2500mAH. (See photo). It's only 50% more than a set of 18500 cells that I have, rated at 1600mAH, and actually deliver exactly that much. I'll look for another brand of battery and won't buy these again.

Rated 6800mah. Actual less than 2500mah Weight much less than other 26650 batteries This battery miss advertised