Powerex AA 2700mAh NiMH Rechargeable Batteries w/holder- 4 Batteries Per Pack by Maha Energy Corporation
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Digital camera reviews of Powerex AA 2700mAh NiMH Rechargeable Batteries w/holder- 4 Batteries Per Pack
Digital camera Review: Excellent capacity
Summary: 5 Stars
I use them in my hiking GPS receiver which tends to eat AA batteries quickly. These last much longer than alkalines and seem to hold a charge quite a while before use, so I carry two extra pairs in my pocket. Haven't had them long enough to say anything about how long they last before they stop holding a charge, but so far they're doing well.Digital camera Review: Good but 50% success rate right now
Summary: 3 Stars
Bought these plus the Powerex charger last March 2007 and it is now December 2007. After 2 months, 2 pieces displayed rust on the + and - ends of the batteries...the other two are ok. They all still work until now though although I've noticed that the rusted ones have less charge. I like them though and I've decided to buy 4 more to test again since I am more or less ok with the product. They are especially good for remote control toys since they last a long time. :)
Digital camera Review: Good long lasting power
Summary: 4 Stars
I'm fully satisfied. I use these batteries in a very power hungry GPS device and they perform well.Digital camera Review: Good while they last...
Summary: 2 Stars
I purchased these PowerEX batteries about two years ago. I own a 4pk of 2700mAh, and a 4pk 2500mAh batteries by PowerEX. When brand new these batteries packed a huge punch! They had excellent life and would hold up fantastic in my digital camera.
However, after around 6-8 months of use I found these batteries began to seriously begin falling apart. I have owned plenty of rechargeable batteries in the past and even some going on 4-5 years old are still running like champs(they aren't strong enough for a digital camera though). By about the 8 month mark all 8 batteries pretty much performed like very "low grade" AA batteries. Even after a full "gentle" charge within 10-12 shots they were drained. Even in a simple remote control they would die within 2 weeks.
Eventually all 8 batteries began to give "error" when trying to charge. The charge works fine however as some AAA powerEX batteries I own are still working great even after 2 years. I might of understood 1 or 2 going bad... but how could 8 AA batteries all go bad with the exact same problem relating to holding a charge. Only thing I could think of is "BRAND NEW" they might be 2700mAh but after a few recharges that 2700 might begin to dip down to 2400... to 2000... to 1600 etc.
Out of the box, these batteries ROCKED and gave me 6 solid months of performance. However, after 6 months they all began to die one at a time over a 2 month span. I would rate these 2 stars simply because rechargeable batteries rated at 2700mAh should last about 3 years and over 1,000 charge cycles. After about 100 charge cycles and 8 months these were dead.
[you should always let your rechargeable battery fully die before charging it to maximize the lifespan]
PROS
- Out of the box they work FANTASTIC!
- Small case mine came with is made of strong plastic and is VERY DURABLE (high quality holder)
CONS
- All 8 died in well under the average life span... all from the exact same problem
- After about 20 charge cycles the batteries clearly were not performing like 2700 mAh anymore even after a full "gentle charge"
*NOTE: I also own 8 PowerEX AAA batteries (Rated 1000 mAh). These have worked exceptionally well even after 2 yrs and almost 300 charge cycles at least. No idea why the AA's were all busts. Only gripe I would have about the AAA's is when tested they rate about 870-950 mAh instead of 1000 mAh but that is probably due to age.
Digital camera Review: Great Batteries
Summary: 5 Stars
These are great batteries at a reasonable price. I use them in our four GPS's and they give us a long run time. Great batteries from a great dealer.