Jim Weir wrote:

That's an interesting heresy. Care to share where you got this information?
Most of us have switched to NiMH because of the nicad's notorious self-discharge
effects. That's why they were invented.

It's not a heresy, just overstated. It's well-known that NiMH cells suffer
from much more self-discharge than alkaline and somewhat more than NiCd
cells. (But they have much more capacity and are better environmentally so
overall they are far superior to NiCd.)

Here's Eveready's list of NiMH characteristics:
Most cost-effective, economical power source over the life of the battery

Recharges up to a thousand times

Best suited for frequent usage and heavy-drain devices, such as digital
cameras

Good low temperature performance

Interchangeable with non-rechargeable batteries in the same size

Limited shelf-life—loses 1% of deliverable energy per day when stored at
room temperature

If StealthPilot's cells are discharging substantially in a week then
there's something seriously wrong with them and they should be replaced.

Stealth Pilot
shared these priceless pearls of wisdom:

-
-
-if you charge up a nicad it will retain the charge for quite some
-time.
-a NiMh battery by comparison will self discharge in about a week.
-they charge quicker but need to be fully charged just prior to use for
-the best effect.



Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com