Capacity and self-discharge of batteries «UltraFire 3500» - detailed results
Brand / model
Date of manufacture
Tested item is used
Discharge (1-hour rest)
990 ±1% mAh (≅3.86 W·h)
Discharge (5-day rest)
960 ±1% mAh (≅3.74 W·h)
Discharge (1-month rest)
920 ±1% mAh (≅3.61 W·h)
Date of measurement
Thanks to Nikola Goranov for supplying this cell for testing purposes!
This battery is a part of a chinese bike flashlight. Despite the „3500 mAh“ markings,
the actual capacity is no more than 1000 mAh, even though this isn't the
most ridiculous lie from UltraFire :) It seems that both models of this brand weigh some mere 33 grams,
which kinda explains the quantity and quality of the chemistry they contain...