In a message dated 9/2/2005 11:27:16 PM Pacific Standard Time, [EMAIL PROTECTED] writes: Think of it more this way...
If you heat water toward boiling point, you will get hot water, but if you heat it hotter than boiling point, you will get gas (steam). Water can only accept so much heat before it vaporizes. A battery can only accept so much energy before its physical properties also begin to change for the worse. A lead acid battery will boil off its electrolite. A NiCad will overheat, expand, explode. A LiIon will suddenly ignite. The chemistry is affected by charge state. Push it past a certain point, and its composition changes in an undesirable way. ============ Hmmm, I leave the charger on my Canon batteries on a long time. For hours, usually longer than it takes to actually charge them. Go away, busy, etc. I THINK the charger shuts off when the battery is full. It appears to. But maybe I should double-check this. I do the same thing actually, with everything I charge. Cell phone battery, PDA battery, etc. Leave it there over night sometimes. However, in those situations the charger is battery specific, designed for that specific battery. And they all appear to shut off. But even so I may be losing some battery power, huh? Maybe they overcharge a tiny little bit each time. This needs more thought. Marnie Or more helpful people with answers.