Highest capacity AA NiMH rechargeable batteries...?

[Majarvis]

I was just wondering if anyone knew what the highest capacity (mAh) you can buy in rechargeable batteries? I have 1950 mAh in some NiMH rechargeables, and 1850 in my backup/spare Energizers, but there must be higher out there, right? Just trying to get that extra little bit of life out of my camera, thanks

Also, if there's a site to order them off of that would be great!

 

[Klostrophobic]

The highest I've seen are 2100 mAh.

You can order them at Green Batteries.

 

[LoudMusic]

How do NiMH and Lithium Ion batteries compare? I would assume Lithium Ion are longer lasting and stay cooler or something but I have no idea. They probably take up less space as well. Does anyone know the spacifics?

 

[Majarvis]

Well, I've had the Energizer Lithium 1850 mAh batteries in my digi cam for like a week now, and they're still going, compared to alkaline's that would only last me a day of taking pictures.

 

[Klostrophobic]

Lithium-ion batteries have several advantages:

They have a higher energy density than most other types of rechargeables. This means that for their size or weight they can store more energy than other rechargeable batteries. They also operate at higher voltages than other rechargeables, typically about 3.7 volts for lithium-ion vs. 1.2 volts for NiMH or NiCd. This means a single cell can often be used rather than multiple NiMh or NiCd cells.

Lithium-ion batteries also have a lower self discharge rate than other types of rechargeable batteries. This means that once they are charged they will retain their charge for a longer time than other types of rechargeable batteries. NiMH and NiCd batteries can lose anywhere from 1-5% of their charge per day, (depending on the storage temperature) even if they are not installed in a device. Lithium-ion batteries will retain most of their charge even after months of storage.

So in summary; lithium-ion batteries can be smaller or lighter, have a higher voltage and hold a charge much longer than other types of batteries.

But, Lithium Ion batteries are a lot more expensive