Sanyo Eneloop AA NiMH Pre-Charged Rechargeable Batteries - 4 Pack
by SANYO
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Digital Cameras Photo Reviews of Sanyo Eneloop AA NiMH Pre-Charged Rechargeable Batteries - 4 Pack
Customer Review: "'For digital cameras' - my ...!"
Summary: 1 Stars
I have repeatedly attempted to find rechargeable batteries I can use with my digital camera (Olympus FE-310) so that I'm not buying and depleting lithium batteries over and over, for both financial and environmental reasons, and had high hopes for these based on the description. These hopes, unfortunately, were dashed. Although the Amazon page advertises these as well suited for digital cameras, two of the batteries in the package did not produce enough voltage for my camera's power electronics to not mistake them for dead AAs, right out of the package, no matter how much I charged them. The other two batteries would power the camera when first installed but could only sit, idle, in the turned-off camera for a few hours before experiencing the same result. Putting a fully charged battery into a camera and turning it on only to have the "Dead Battery" screen sneering at you is an extremely frustrating experience, and I'm glad I tested the camera out at home so that I didn't discover the uselessness of these batteries at a critical time. While they might work well for some applications, they are worthless for my intended purpose, in contrast to the claims of their advertising.
(Dear electronics companies: is it really THAT hard to develop a battery that 1) is rechargeable, 2) holds a charge for more than 11 bloody seconds, 3) puts out enough voltage to not be worthless, and 4) is offered in AA size and voltage range?!)
Customer Review: Dependable batteries
Summary: 5 Stars
Hi... I researched a lot before buying a rechargeable battery especially when my energizer get 'de-energized' barely a month while lying in my drawer without being used! I found out that Sanyo was currently the best, so I ordered the 2700mAh high capacity and 2000mAh precharged (eneloop, white label), low discharge batteries. Here is what I observed after charging the batteries and observing them with a digital multimeter, after 2-3 weeks while stored in my shelf without being used:
2700mAh battery had 1.31V and about 2100mAh capacity.
The 2000mAh batteries had about 1.39V and about 1900mAH current.
My verdict: the 2700mAh is really not the 2700 capacity, but slightly better than slow discharge PROVIDED you want to charge and use the battery immediately. In my case, I use batteries occasionally and so the low discharge eneloop ones are better since there is always some charge left whenever i want to use the batteries, enough to allow me to click several pictures with my digital camera. Moreover, I hate to see batteries in low charge state whenever I want to use them, so for me the pre-charged eneloop ones work best as then can retain charge for several months. In my opinion, due to practical situations, the precharged, low discharge eneloop are better, but in case you would like to have a little more juice in batteries and want to use it for immediate use, go for the 2700mAh.
Customer Review: New & Improved Rechargeable Batteries
Summary: 5 Stars
I was skeptical about going back to any rechargeable batteries. Just when I was getting used to dealing with old fashion NiCad batteries dieing so quickly and without notice, and having to revert to the more dependable alkaline batteries, the Eneloop batteries were developed.
The Eneloop batteries last as long as alkaline before they have to be recharged, so there's no problem with them. While I'm using a set of Eneloops, I just keep a spare set ready for when they finally do die, which takes a much longer time than I ever expected.
For example, I use the Eneloops in a Sony CD/radio Walkman while outdoors and indoors. When I'm indoors, I don't even bother plugging in the AC power adaptor to conserve battery power. There's plenty of power to spare which lasts several hours per day for an entire week at minimum. It's a pleasure and a convenience to use the Walkman while wireless, as it was intended to be used. I'll just save the AC adaptor for when they finally do need a charge.
Eneloops 'keep going and going' better than the Enegizer bunny. Okay, well someone had to say it, and it's true! I believe that Eneloops are even better than Energizer and most other brands of NiMH batteries.
It's a pleasure to find a product that really works very well. I think the $9 with free shipping that I paid for these 4 rechargeable AAs is a good deal.
Customer Review: The only NiMH batteries worth buying
Summary: 5 Stars
These low-self-discharge batteries are game-changers... really that sounds like an exaggeration, but these batteries are really the first to live up to what people's expectations of rechargeable batteries is (and should be).
With most NiMH batteries (ESPECIALLY the very high-capacity ones like 2400mAh and 2700mAh), internal discharge rate is unreasonably high. What this means in practice is that if you have a regular 2400mAh NiMH battery and an Eneloop 2000 mAh battery, charge them both to capacity, then use them a month later, the Sanyo will have much more capacity left to give you.
With regular NiMH batteries, you really have to charge them up just before the week/weekend you want to use them, and then consider them useless until they are charged again. If you want them 'on tap' available at all times, then you need to buy enough smart chargers to keep them all on the charger all the time... which would cost a fortune.
The Eneloops can effectively be charged, put in your equipment, and practically forgotten about just like Alkalines. But if you do use them up, you don't have to throw them away, you can just recharge them and put them in the pile of fresh batteries again without really thinking too much about it... finally delivering the promise that most people expect out of rechargeable batteries.
Customer Review: Sanyo eneloop is the only way to go
Summary: 4 Stars
I've had them NEW (they came fully charged) in 2 emergency flashlights for 6 months now and they STILL have a strong charge. That's a GREAT start! I cannot attest to how these batteries perform after multiple recharges yet (why I gave only 4 stars).
Say "farewell" to leaky and damaging alkaline AA batteries and get ENELOOP's. You'll be glad you did. So far, these are the BEST rechargeable AA batteries that I've ever used.
UPDATE, Sept 2009:
Amazon would not let me do a separate review of the Sanyo eneloop AAA batteries, so here it is:
I've only had these for a few charge cycles now but they are performing just fine. I've been using Sanyo eneloop AA and now the AAA and I can honestly say that I don't know of a better AA or AAA NiMH rechargeable on the market.
These batteries hold their charge like no other!
Case in point: I have 2 standard Maglight-brand flashlights that each take 2xD batteries. Both flashlights have been converted to use 2xAA eneloop batteries. I keep these flashlights in my house for emergencies. I test them every few months and they shine brightly each time. They've each had AA eneloops inside since August, 2008, and I have not recharged them ONCE. The batteries have held their original charge for more than one year!!