On Wed, 24 Jan 2001, Simon Nield wrote: > taking another manufacturer's datasheet (see page 9): > suggests a similar maximum self-discharge rate of 2% per day (making the same approximation of it > being almost linear over the 30 day measured period) That's the problem with manufacturer data - it's wrong. Another poster mentioned 5% per day based on his experience and I said 10% based on my experience. We're both right, and the manufacturers are very optimistic. Hi-capacity nicads are not much better. I have a THS720 scope, and 4 battery packs. If I charge all the packs, wait a week, I can barely get 25% life from each pack. If I've left one in the scope, it'll run maybe 5 minutes(supporting the low-drain theory has merit). Battery manufacturers have ALWAYS LIED, get used to it. Duracell also claims a D-alkaline has 18AH, and I have tested them under their conditions and never gotten better than 13 or so. Cheerful regards, Bob Blick -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.