All of this talk about crappy batteries has me wondering...

[NightCrawl]

Test / Review: UltraFire BRC18650 4000 mAh (Brown-Gold)

Test of UltraFire BRC18650 4000 mAh (Brown-Gold) UltraFire BRC18650 4000 mAh (Brown-Gold) [image] Official specifications: Voltage: 3.7V Actual Capacity: 2600mAh Built-in PCB protection board Package contains 2 batteries [image] This battery state 4000mAh on the cell, but at the current time the maximum possible is 3100mAh, i.e. something is wrong. The specification does list a lower capacity (2600mAh), but even that is too high, as can be seen. The internal resistance is also high…