Re-chargable Batteries?
Out of context: Reply #13
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- pango0
found a review on amazon. so ya energizer rebatteries before 2010 or 2006 are complete shit. But the ones made after 2010 are pretty good.
"My original review was about the Energizer '2500mAh' batteries back in 2006. Energizer introduced the new '2300mAh' series in 2010. I have now updated my review to reflect my opinion on the new series.
I had very bad experiences with the previous generation of Energizer 2500mAh rechargeable NiMH batteries, circa 2005. They suffer from rapid self-discharge problem (that is, can't hold a charge for more than a few days even while not in use), and have very limited lifespan (capacity deteriorated badly after just a few dozen cycles). Energizer's initial response was to change the existing series' capacity rating to '2450mAh', as if mere name change is going to solve anything. Around mid-2010, Energizer finally started to introduce a new series to address this problem. The series is named 'Recharge' and it claims to "Hold charge up to one year".
The Energizer New Recharge Batteries featured on this page is the new 'Recharge' series, with a rated capacity of 2300mAh for AA cells. I have tested a set of those new batteries, using my La Crosse BC1000 charger/analyzer. Here are my findings:
- Right out of the package, the average remaining capacity is 1684mAh, or 73% of the rate capacity.
- After the first Charge/Discharge cycle, the average capacity jumped to 2314mAh
- After three more Charge/Discharge cycles, the capacity improved slightly to 2362mAh
- After storing the batteries on the shelf for 3.5 months (108 days), the remaining charge is 88% of original capacity.The above showed that those Energizer 2300mAh cells are indeed low-self-discharge type, similar to the better known Sanyo eneloop.
I have just one remaining doubt: Energizer seems evasive about the battery lifespan, saying only "Charge 100's of times" and "Charge up to 250 more times (than Energizer 2450mAh)". In contrast, Sanyo proudly advertises '1500 cycles' for the eneloop.
On the other hand, the Energizer cell's measured capacity is about 12% higher than that of the eneloop (rated 2000mAh, measured 2100mAh), so even if it can only last for 500 cycles, it is still worthwhile to give it a try. Just make sure that what you get is the new 2300mAh series, not the old 2500/2450mAh junk series."