Sanyo 2,700 mAh AA NiMH Rechargeable Batteries (4-Pack)
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Digital Cameras Photo Reviews of Sanyo 2,700 mAh AA NiMH Rechargeable Batteries (4-Pack)
Customer Review: The Sanyo 2700s are better by a mile than Eneloop 2000 mAh Low self-discharge (LSD) batts
Summary: 5 Stars
Review of Sanyo 2700 mAh High capacity rechargeable batteries
I recently Purchased 2 sets of these for an Olympus SP-550UZ 7.1MP Digital Camera with Dual Image Stabilized 18x Optical Zoom camera. This camera eats up batteries. You can put a brand new set of alkaline energizers in the camera and it will power up just long enough to let you know that it thinks the batteries are dead.
I have been using the Sanyo Eneloop 2000 mAh Low self-discharge (LSD) for several months. They work but not well. I have to take them right out of the charger and put them into the camera to get 250 shots. If the Eneloops have been charged and have been sitting for 24 hours the camera says they are low on charge and I might get 30 shots.
The Sanyo 2700s are better by a mile. For the first time ever I powered up the camera the next day, after using it the prior day, and the camera did not complain that the batteries were about to die.
I highly recommend these batteries for applications where lots of power is needed.
I also highly recommend using a La Crosse Technology BC-900 on it's default setting which trickle charges the batteries at 200 mAh. To fully charge a set of batteries takes around 13.5 hours, but because the Olympus SP-550UZ can't use the battery's full charge, toping the batteries of only takes about 5 hours or less.
May 14 2009 update.
These batteries need to be run down and recharged to get the full use of them. The first time I charged these up I only got 84 shots. After using the La Crosse Technology BC-900's discharge and recharge option several times I got 212 shots out of a set the other day. On this shoot I was using the zoom a lot and that uses a lot of power.
I shoot RAW so on a 2GB type H card I get about 196 shots. So getting 212 shots out of a set of these batteries is great.
I also have tested running batteries dead. When a battery is run down all the way and left for a while it tends to develop micro shorts in it. To a charger it will look dead and the charger won't charge it.
Well I found that if I just left the dead battery in the La Crosse Technology BC-900 charger long enough, sometimes over night, It would start charging eventually. The charger charges at 200 mAh by default and runs a trickle charge of 20 mAh to keep a battery toped off. I suspect that even though the charger does not recognize the presence of a dead battery it is still running a small charge through it. This charge is enough to fix the micro shorts over time and then the battery will start charging normally.
Customer Review: The strongest NiMH batteries available
Summary: 5 Stars
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.
Customer Review: VERY GOOD QUALITY - MUCH CHEAPER ELSEWHERE
Summary: 5 Stars
Sanyo batteries are very high quality. Same goes for the MAHA-PowerX, and Ansmann brands. I suspect, but can't prove that MAHA-PowerX and Ansmann sell rebranded Sanyo batteries. MAHA-PowerX and Ansmann are very high quality charger manufacturers that offer only high quality batteries for sale to keep their good reputations. Keep away from Duracell, Lenmar, R2G, Energizer, all no-name models, all regular-(self-)discharge AA's with less than 2400 mAHr capacity, all regular-(self-)discharge AAA's with less than 1000 mAHr capacity.
You may want to substitute with the relatively new technology "low discharge" types of NiMH. This simply means they hold their charges much longer than standard NiMH batteries *when not being used*. That's why they are often advertized as being "pre-charged" - typically to 75% of the full capacity. The only downside is they don't have quite as much capacity as the standard type: 2100 mAHr verses 2600 mAHr for AA's and 800 mAHr vs. 1000 mAHr for AAA's. Great for cameras that stay in the closet for months then suddenly get used heavily at birthday parties. Not good for FRS (family use) or GMRS (business use) radios that need to be recharged each day anyway. Low-discharge brand names and models: Sanyo Eneloop, Accupower AccuEvolution, Ultralast Hybrio, Uniross Hybrio, Nexcell energyOn, Tenergy R2U, MAHA-PowerX Imedion, Ansmann Max-e, Rayovac Hybrid 2100.
Customer Review: Sanyo 2698 maH...Sony 1980 to 2057 maH
Summary: 5 Stars
Updated Aug 2009
I can't believe I got one favorable review out of five.
Then I re-read my review and I want to clear something up.
I believe this item is great (the Sanyo), I was complaining about the Sony Batteries
which are terrible. May be not all Sony's, BUT the Sanyo's I got in my hand work very well, and the Sony's I got in my hand were disappointing. With the two types that I have, there is no comparison. Sanyo over Sony. If you have both brands to test, then add a comment... Could be that I had counterfeit Sony's.
Original review below :
I can't believe I rushed in a bought 12 Sony Rechargables, before reading the reviews. I also have the LaCrosse BC900 charger (best one out there but use only 200 500 or 700ma source) I have refreshed and did every thing possible with the Sony batteries and they still are around 2000 maH ( were advertised as 2600). I wish now I would have gotten the Sanyo eneloop PreCharged AA which have a self life of over a year and still maintains 2000 maH.
Customer Review: Outstanding Capacity - Great Quality
Summary: 5 Stars
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.