Sanyo Eneloop Batteries, available in AA & AAA sizes, use nickel metal hydride (Ni-MH) chemistry.
Unlike other rechargeable batteries, Eneloops are designed to hold up to 75% of their charge for up to a full year.
They can be used directly out of the package without charging and can't be overcharged.Perhaps most importantly,
Eneloops have a very predictable discharge curve, so it is easy to predict performance.
Here's a link to Sanyo's Eneloop User Guide.
Click here to purchase Eneloop batteries
