Chris W wrote in message ...
Morgans wrote:

Chris, can you quote a source on the 10% discharge per day on the NiMH? I
have not found that to be the case.
--
---Jim in NC---

http://www.allegromicro.com/techpub2/cadex/index32.htm

apperently I didn't remember the details exactly right but the fact that NiMH
have a very bad self discharge rate is true. In fact rechargable batteries as a
group have a self discharge rate that is a lot worse than most non rechargable
batteries.

From the link you supplied:

"Self-discharge: Both NiMH and NiCd are affected by reasonably high
self-discharge . The NiCd loses about 10% of its capacity within the
first 24 hours, after which the self-discharge settles to about 10%
per month. The self-discharge of the NiMH is one-and-a-half to two
times higher than that of the NiCd. Selecting hydride materials that
improve hydrogen bonding to reduce self-discharge typically also
decrease the battery capacity."

So it's more like 10% for the FIRST day, then 10% per MONTH
thereafter.

SM