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: Not Great for My Uncle or Me
Summary: 2 Stars
I'm writing about my experience with eight of these and my uncle's experience with four. I purchased all of these batteries approximately eighteen months ago.
I've used the batteries in my Canon 580EX camera flash and my son's Thomas & Friends engines, and my uncle has used his PowerEx batteries in his metal detector (I don't know what kind). I charge the batteries in a LaCrosse BC-700 charger on standard charge (200mA/h). My uncle uses a different type of charger, and I don't know what kind it is.
My uncle and I conclude that these batteries fall far short of decent. We have just one brand of batteries for comparison, Tenergy, and the Tenergy batteries have held up for my uncle and me a lot better than the PowerEx batteries.
I think I'd be embarrassed to learn how much time I spent reading various reviews before making my purchases about eighteen months ago. The reviews are clear: PowerEx is the way to go. However, that's just not my uncle's experience, nor mine. Our experience is the complete opposite: PowerEx is definitely not the way to go.
Perhaps with a Maha/PowerEx charger, PowerEx batteries perform better, and maybe my uncle and I simply got a bad batch of PowerEx batteries and a stellar batch of Tenergy batteries. I have thirty-six Tenergy cells (AA, 2700ma) and my uncle has eight.
The dissonance I feel from the difference between my uncle's and my experiences versus the consensus of reviews is what motivated me to write this review. Why are our experiences so different?
Digital camera Review: Not even average
Summary: 1 Stars
I bought 8 of these to use in 2 pieces of work equipment. Each unit uses 4 batteries in series to bring the voltage up to about 5 volts. Using 3 different chargers to see if it made a difference, I couldn't get these to last more than about 3 1/2 hours. I then tried Sanyo eneloop batteries that are rated at 2000 mAh and they lasted 4 1/2 hours. If these actually provide 2700 mAh, then they do so while dropping in voltage to a point that equipment that requires the batteries to be near full voltage won't work for very long.
Since rechargeables are supposed to remain at near their rated voltage for most of a charge (in this case 2700 mAh), I think these batteries are low quality. Since this happened with two different sets of 4 batteries, I don't think I just got unlucky and got a bad battery.
Due to the expectation of high quality, and the high price, I justify 1 star for their performance.
Digital camera Review: POWEREX WORTH THE MONEY
Summary: 5 Stars
Powerex is worth the extra cost. They outlast any other rechargeable currently on the market. I have a dozen devices operating on rechargeables - Powerex reduces the hassles of changing out batteries so often.Digital camera Review: Poor Quality / Reliability
Summary: 1 Stars
I only bought these batteries after seeing everyone's review online that they are the best.
I used them on my portable set of speakers. however for some reason they started losing their charge after 15-20 times of use (5 months of use) I always charge the battery after they are low to try to make sure they are top condition. I tried charge and discharge to refresh them but they are still dead. I have also owned Engergizer's Rechargeable batteries at the same time i bought the powerex in 2007 and they prove to hold its charge its been 2 years and they are still great. I
I've heard the Sanyo Eneloops are good so I'm going to try them out.
Digital camera Review: PowerEX Batteries
Summary: 5 Stars
These PowerEX batteries are great. The best AA batteries I have ever used. Just one set of 4, lasted twice as long as my other AA recharge batteries in my camera Hi-Powered flash. I liked the first set so much, I purchased 3 more sets, for my other flashes. I use 3 flashes at a time.