Capacity and self-discharge of batteries «PowerGenix Ni-Zn» - detailed results

Battery photo


Brand / modelPowerGenix Ni-Zn
Alternative packagings
Date of manufactureN/A
Condition (age)Tested items are used
Low self-discharge (LSD)No
Discharge (1-hour rest)6.70 V
1380 ±1% mAh (≅2.31 W·h)
Discharge (5-day rest)6.73 V
1330 ±1% mAh (≅2.23 W·h)
~4% self-discharge
Discharge (1-month rest)6.65 V
1240 ±1% mAh (≅2.06 W·h)
~10% self-discharge
Date of measurementSep 2013


These cells are courtesy of, and feature an unusual chemistry - nickel-zinc. In fact, they don't compare to NiMH particularly well, developing a much higher working voltage, as it can be seen from the charts. A comparison between the different chemistries:

ChemistryUstart (per cell), VUstart (4-pack), V Uavg (per cell), VUavg (4-pack), V

As it can be seen, the average voltage of Ni-Zn's is higher than what a fresh non-rechargeable cell develops. If the device is sensitive to input voltage, then it will behave as if it is on a pack of brand-new alkalines, all the time, provided that it doesn't smoke out in the beginning. Internet suggests that you don't use this chemistry in a flashlights with bulbs: they aren't calculated for this voltage and die when turned on.

Besides that, the other characteristics of these cells aren't particularly impressive: reports on the Internet suggest that they degrade pretty fast with each cycle; they require a specific, non-compatible charger; and their energy density isn't impressive despite the high voltage: they clock around the average for Ni-MHs, 2.3 Wh.

Test results

Test chart

← back to the main page