Powerex AA 2700mAh Rechargeable NiMH Batteries w/holder- 4 Batteries Per Pack by Maha Energy Corporation
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Digital camera reviews of Powerex AA 2700mAh Rechargeable NiMH Batteries w/holder- 4 Batteries Per Pack
Digital camera Review: Lots of power
Summary: 5 Stars
Best recharge-ables I've bought thus far. 5 set purchased. I use them in my wii remotes, remote controls, front door key pad, kids games, remote cars, etc. Have recharged them dozens of times - no failure, while other brands have, Only one draw back to these, they don't last incredibly long in my furnace keypad - but I think this was due to me mismatching a different type of rechargeable battery with 2 of these. The other failed (Ultra pro NiMH) withing 1 month and the voltage level was no longer high enough. I have since replaced the faulty battery with another powerex and all is good so far. Try your best to match up all the batteries the same. The ones in my front door key pad have been in there for over a year now, on the same charge. Hope this review was helpfulDigital camera Review: MAHA 2700mah clocking in at ~2200mah or less!
Summary: 1 Stars
We purchased a large quantity of these batteries for work to supply to customer sites. The batteries have been cycled through the Lacrosse BC-900 at 1A each on Refresh. It usually takes about 2 days to be finished on refresh.
I've spot checked several dozen and they're all significantly low on the capacity. They've got 'great' reviews, but so far we're not seeing it. Many of the batteries arrived at <0.84V, which requires a jumper trick to bring them back.
Worst of all is their self discharge rate. With at least 100 batteries out in the open in 4 pack containers within a 1.5 weeks they're down to 1.1V, and after that down to 0.95V. Useless.
Now I've previously reviewed Tenergy LSD cells, and while their rated capacity is not as high they're delivering actual capacity better than these MAHA Powerex cells. Better still, they're holding their charger longer than the MAHA Powerex cells.
If you leave batteries on the charger 24/7 (not a good idea) then these are a great choice- yank them off and stuff them in your flash. But if you don't, please consider getting an LSD cell (low self discharge). It's worth the extra money (or not, depending on brand).
Digital camera Review: My experiences with Powerex 2700
Summary: 5 Stars
I've only had these for three months now. I've used them in two cameras. The Canon powershot sx10is, and my powershot A710is. I just got back from Walt Disney World. I shot a lot of video using the sx10is. I recorded entire shows/parades etc. No failures experienced.Shot all that video, and still had plenty of juice to take flash pictures. The sx10is has a monster zoom as well, so there's another bite out of the batteries as well.
I've taken quite a number of pictures and video since owning these. What I also find refreshing is not finding them dead after a short space of time while not used. Finding dead batteries started to be common with another manufacturer I won't name. I also use these batteries in my portable bearcat scanner. I've gotten around 16 to almost 17 hours of continuous on time out of these powerex batteries.
I have two of the Powerex eight cell smart charger. Since all I use are AA batteries, this charger is ideal for me. When I bought these batteries, the very first thing I did was condition them. Based on the results i'm getting, i'd say that's the way to get started.
I've read some of the reviews here. It's not my intention to question anyones negative experiences here. Sometimes things just don't work as well as they should. That happens unfortunately. As far as longevity goes, my experiences with batteries like these is, they only have a limted life span. (like us, only shorter) They can only be charged/discharged and charged again so many times. I feel that if I can get a complete year of this kind of performance, then I feel i've gotten my money's worth. Digital cameras are extremely power hungry and put one heck of a drain on batteries, or so it sure seems to me. Overall, so far, i'm happy with the performane. If things turn sour, I will update this review to tell you. I've eaten crow before. Just pass the salt if I come back with bad news.
Digital camera Review: Never held a charge
Summary: 1 Stars
I purchased the Powerex charger and four batteries.
The batteries never would charge.
I Tried draining the batteries, I tried letting them charge for several days, but they simply would not hold a charge.
I still use the charger for my other rechargeables, and it works great.
After reading so much about these batteries, i was highly dissapointed!
Digital camera Review: One of the few 2700 mah nimh that keep up with the sanyo's
Summary: 5 Stars
Recently I've noticed the sanyo 2700 mah cells are failing - usually 1 cell out of 4 all matched into the same product (flash, recorder, etc). When charging you can see one sanyo cell is falling behind over time and soon hits the point where it wont take a charge and wont supply any power.
The powerex 2700 perform almost identically to the sanyos, except they do not have 1 out of 4 cells that start to die and finally won't work.
I'm actually happier using the powerex 2700 now than the sanyo and plan to convert to them as my sanyo cells die off. (I try to keep matched sets to prevent reverse discharge, so when 1 of 4 cells dies you're stuck trying to find a replacement set and end up with one good battery waiting for another failure to take the good one paired with it and make a new set if they match in capacity)
Believe me its a pain, but the advantage is you avoid the reverse charge problem.