This is a behavior actually designed to prolong the battery's lifetime. It was a change made around the Gigabit models or somewhere else mid-Titanium line. It prevents a lot of very short charge-discharge cycles, whether from the battery normally just losing some of its charge over time, or if you unplug for only a minute or two. In general, Lithium-Ion batteries have a certain number of charge cycles, and fractional charge cycles count for a fractional part against the life; if your battery has 500 cycles left in it, and you drain it to 80% left then recharge it, it now has about 499.8 charge cycles left. Anyway, the idea is to prevent it from continually charging that last 1% back up when it is lost, and only resort to charging when the level gets low enough that it could start affecting your runtime. silvo conticello <silvoc at tiscali.it> writes: > > Date: Thu, 24 Jun 2004 17:16:30 +0100 > > On 24 Jun 2004, at 17:04, Justin R. Miller wrote: >> >> It continually repeats this cycle, charging to 100%, trickling down to >> 95%, then charging back up again, as long as it is plugged in. > > Wouldn't this behavior shorten the battery life? > Anyhow, my battery status does not move from 99%.