The batteries being discussed here, as Buddy has said, are not 
rechargeable. They are significantly lighter in physical weight than 
their alkaline cousins. A 12 pack of these batteries weighs no more 
than 8 alkalines.

They are good in heavy current applications such as in an HT dry cell 
pack, cameras, or in Buddy's KX1.

I used them in the original Book Port, and in my Sony Mini Disc 
recorder, and observed a noticeable increase in useable battery time 
over standard alkalines.

There is also a triple A version which I use in my Olympus DS50 when I 
know I will be recording with it for several hours.

I should also point out that there is a slightly heavier, in terms of 
weight, lithium double A out there that is also not re-chargeable. I 
don't know what the difference is between the two models, but I think 
the lighter weight model actually lasts longer than the heavier one.

The best price I have found for them is at Sam's Club.





Mike Duke, K5XU
American Council of Blind Radio Amateurs