AA rechargeable battery – 3 month test
Today we finished the 3 month part of our AA Rechargeable Test, this is where we charged the batteries, then let lie idle for 3 months, then the AA batteries were retested. We used the Maha Powerex MH-C9000 Wizard One Charger Analyser to charge the batteries. For the sake of expediency and because we had found the Wizard One’s measured capacity roughly correlated to flashes when tested with a camera and flash, we used the MH-C9000 to both measure the charge applied to give a starting capacity, but also to do a measured discharge as this saved about 3 days on the testing. The figures obtained are below:
Starting Charge
Low Self Discharge
Imedion 2176, 2140, 2187, 2144 Average 2161
Eneloop 2011, 1993, 1979, 2002 Average 1996
High Capacity
Powerex 2617, 2560, 2589, 2540 Average 2576
Energiser 2343, 2322, 2329,2333 Average 2331
Retained Charge after 3 months
Low Self Discharge
Imedion 1927, 1857, 1854, 1882 Average 1880
Retained charge – 87%
Eneloop 1723, 1696, 1708, 1696 Average 1705
Retained charge – 85%
High Capacity
Powerex 2114, 2018, 2050, 2048 Average 2057
Retained charge – 80%
Energiser 1858, 1789, 1865, 1791 Average 1825
Retained charge – 78%
As can be seen, the quality brands produced a quality result, with some a little better than others. As stated before, it is best to match the batteries to your needs and usage.
We were also fortunate enough to be sent by ‘Craig’ a set of 4 Powertech Enekeep batteries. We tested these in the Maha Powerex MH-C9000 and after being put through a few cycles tested for capacity via discharge, the same method as above but without the 3 month gap.
Enekeep 1959, 1952, 1899, 1925 Average 1933
A good result from a battery specified at 2,000 mah
