Summary: Sanyo 2698 maH...Sony 1980 to 2057 maH

Comment: 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.

Summary: Long lasting ... I mean these batteries!

Comment: One word will suffice everything, long lasting. I have taken 100s of pictures on one charge. On top of that, they were not even fully drained since when I went to charge it a couple of weeks later, they were charged in about 15 minutes.
I turn on & off my digital camera a lot on hiking trips and still these batteries haven't drained. Long lasting!

Summary: Not as good as the reviews lead you to think.

Comment: I bought a total of twenty cells and non of them tested higher than 2550mah. Ummm.... 2700...a capacity claim that Sanyo can't hit but Generic Chinese Company #1 can?
The charge doesn't last long either- These things drain just as fast as any other rechargeable. These seem to be just like any of the cheap brands.

Summary: can you imagine that ?

Comment: Recently I pull out my camera i didn't use more than a year. Display has shown a full charge of batteries.(More than year out of use for rechargable!!)When i pull battery out it came up as a Sanyo 2,700 mAh AA NiMH.

Summary: The strongest NiMH batteries available

Comment: 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.