Customer Reviews

Sanyo 2,700 mAh AA NiMH Rechargeable Batteries (4-Pack)

5 star:		(52)
4 star:		(7)
3 star:		(4)
2 star:		(8)
1 star:		(12)

 

 

These are quality batteries w/ 2x's more power and [Longer RUNNING time] than most lower capacity NIMH batteries, including the "ready to use"/ Low self-discharge (LSD) types!

Never thought I would care about writing battery reviews, but the High capacity rechargeables are getting a bad rap from some reviewers b/c they have to be charged (before) use, in order to get back their capacity, after being left (un-used) for more than ~ 3-4wks. Their stored power when [NOT in USE / device turned OFF] is lost faster than batts that keep hold of theirs longer = the LSD types like Imedion 2100 mAh -or- Eneloop 2000 mAh.
-BUT these high capacity batts (2700- 2900 mAh) have an intended purpose, which is a reason the top companies make Both types in the 1st place.

[In Storage]
Yes, the LSDs are useful b/c they have a [Longer STORAGE time] (before needing to be recharged) than the high capacity types. Thus the LSDs are "ready to use" and good for seldom used devices & intermittent usage. However, this doesn't negate the effectiveness of 2700-2900 mAH made by quality brands.
[In Operation]
Not all users (all the time) need a rechargeable for good shelf-life... Some need it for High power & LONG run time for "shorter" segments = 1- 20 days (i.e., photo shoot, day-hike/bike/caving, day at the beach with ur RC (radio-controlled) toys, holiday lighting, etc, etc. And a quality brand (2700-2900 mAh) will do the job.

The decision is [WHEN] do you pick a :(High Capacity/ high self-discharge) -or- (Low Capacity/ Low Self- discharge)...Not picking the universal "better" one. The "best" would be a High capacity & LSD & Rechargeable all in one!- but that's not available yet.

Now, Sanyo's REAL competition is ( Powerex AA 2700mAh NiMH ). They're both good -I would pick 1 over the other, based on sale price or latest technology release.

First off - you need a good charger to get the most out of these batteries. Check out the BC-900 charger or the Maha chargers that have a display and can refresh or break-in a set of batteries.

After reading the other reviews of this battery and having used Sanyo's awesome Eneloop battery, I had to give these a try in my external flash.

Since I shoot weddings, I need something that helps speed up my flash recycle time and can last all day. These batteries fit that bill, and then some.

When I first got them and put them in the BC-900 charger (if you don't have one, get one - it's great.) That charger has a refresh mode that they recommend for new NiMH batteries to break them in. The first pass showed somewhere around 1500-1700mAh, so I was obviously a little concerned. I have two of those chargers and two sets of these batteries so I set one full set to 1000/500 cycle and the other set to 700/350 (BC-900 owners will know what this means.) After letting them run all afternoon and overnight, the 1000/500 set came out between 2610-2720mAh. The 700/350 set is hitting a high of 2760mAh but the whole set hasn't finished yet so it may go even higher.

Some brands increased the size of the battery slightly to be able to jam more capacity into the battery. Sanyo appears to adhere to the original AA size so getting them stuck shouldn't be an issue.

As of right now, Sanyo is definitely the king of the rechargeable battery hill. If you need a battery that can hold a charge for a long period of time, check out the Sanyo Eneloop battery.

These cells state a 2700mah capacity. But since cell capacities are frequently overstated for competitive reasons, one should always measure the effective capacity in your application. In my application, I expect a 400ma constant current drain. So I charged 4 cells and then discharged them at 400ma and recorded the capacities. They were quite uniform, which alone speaks to the quality of the cells, and had an average capacity of 2450mah. Yes, that's less than the 2700mah rating, but that rating is usually a 10 hour discharge rating. That is, at 270ma constant drain, the cells will take 10 hours to reach terminal voltage. So 2450mah at a 6 hour discharge rate tells me that Sanyo is justified in claiming 2700mah capacity. And there are lots of cells out there for which this is not true (like SunPak).

I recently purchased a digital camera with an excellent reputation, save for its long recycling times for its built-in flash. Most of the reviews I'd read of that camera said it took about five seconds to recycle the flash.

Hoping to do better, I purchased these GE/Sanyo nickel-metal hydride batteries. My own tests show these superior batteries take only two to three seconds to power the flash on my camera. That's nearly fifty percent better performance than from other batteries. Even non-rechargeable, high-end alkalines can't beat that performance.

Best of all, the price for these is better than other name brands of NiMH AA batteries.

Better than expected performance and a great price--that adds up to five stars.

I've used a number of types of rechargeable batteries from various companies in the past. I bought these batteries to power my Olympus FL50 flash for my DSLR camera. Other rechargeable AA batteries only last for 150-200 flashes, with a slower and slower recycle time in between flashes. These Sanyo batteries lasted me over 1500 shots on one charge, with less than a second of recycle time in between flashes; that is simply amazing.
I highly recommend these batteries to anyone who has a power intensive device that requires a quick recycle time.

I use AA batteries as part of my job. Plowing through as many as 15 to 20 a day in my alkaline days. Several years ago I made the switch to NiMH rechargables for both environmental and economical reasons.

I can safely say I have tried just about every make and capacity of AA NiMH battery out there and the Sanyo 2700mAh are, so far, the best for the money. I use high drain devices so the lower capacity batteries end up being too much of a hassle to change all the time. These fit my purposes perfectly.

If you are looking for some AA for your remote control or some other low drain devices go with a cheaper NiMH but for high drain devices these are the best.

I'm using these to power my Canon 430EX flash unit. Right after I bought them, I did a slow charge overnight to get them to full capacity. Then, I placed them in my La Crosse BC-900 charger/discharger to cycle them and measure their capacity. All four batteries were within just a few mAh of each other and the capacity of each one was right at or over their rated 2700 mAh.

They now have several charge/discharge cycles on them and they are doing great. They don't seem to self-discharge as fast as some older NiMh batteries I've used.

As of right now, I don't know of *any* AA battery that has a capacity of more than 2700 mAh. Sanyo is well known for their rechargeable batteries and these prove to be consistent with Sanyo's high quality.

I don't expect them to give me any problems, and if they last beyond several cycles, (I know they will) they will have paid for themselves over alkalines.

Very satisfied user.

When talking about batteries, there should not be a long review.

The Sanyo 2,700mAh have fantastic capacity and they hold a charge.
I also have Eneloops and they're good, but if I was to choose between the two, I'd take the 2,700s'
The way I look at hardware,...if I have to think about it,...its not preforming well.

I don't have to think about these cells.

With all the positive reviews, I must've just gotten unlucky on a bad batch of the white wrapper version. I'm getting 1800-2100 mAh on all four of my batteries even after 2 full Refresh cycles on my LaCrosse charger. This is obviously well below the stated "minimum 2500 mAh" on the batteries. I love Sanyo normally and I'll continue to buy their Eneloop series, but as of October 5, there's at least a small chance of receiving a bad batch of these batteries.

This review is for Sanyo 2,700 mAh AA NiMH Rechargeable Batteries (4-Pack) As all the reviewers have already noted this is the best set of MiMH rechargeable batteries you can buy period!

I have a set of Sanyo/GE batteries which I had purchased in 2001 and they still work like new, That gives you an indication of the quality of batteries we are talking about.

The Cells are MADE IN JAPAN excellent Quality, Lasts forever, Ideally suited for Digital Camera and high drain portable equipments.

A General word of caution: Take care of your rechargeable batteries, never charge them in RAPID chargers which charges batteries with high current within a short period of time, overheating during charging can significantly reduce their life span. Never short circuit batteries and never discharge them completely.

Buy with confidence! These are very good batteries.