Re: Li-Ion Shelf Life: Outdated?
- From: zwsdotcom@xxxxxxxxx
- Date: 27 Aug 2006 19:49:48 -0700
Daveman750 wrote:
My understanding from extensive reading that I have done on the subject
is that Li-Ion batteries have a finite, relatively short shelf life,
The shelf life is heavily influenced by a variety of factors. Some
batteries have an internal microcontroller that leeches a little power
off the pack to keep itself alive. These batteries will discharge past
the safety limit if they are stored for prolonged periods at a low
state of charge. Temperature is a big factor, too.
If your laptop has a calibration utility, use it to recalibrate your
battery capacity. Read out the measured mAh capacity and compare it
with the battery data plate.
The laptop I'm using to type this has two batteries, one of which is
about 18 months old, the other of which is unknown (since I bought this
battery used on eBay). Both of them run the machine for more than three
hours with brightness down and WiFi off. This is about 80% of the
capacity the original battery had when I bought the machine. I consider
this very lucky. On the flipside, my Armada M300's battery went
virtually unused for a year - then I went on a trip, turned the machine
on, and it died suddenly within ten minutes.
.
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- From: Daveman750
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