I've seen references a couple of times to the fact that newer batteries need to stay on the charger for longer periods of time than older ones. Can someone give me a simple explanation of why? Thanks. Thon --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.766 / Virus Database: 513 - Release Date: 9/17/2004