How can you tell when your LiIon battery needs replacing?

[famousdavis]

I have an hp1910. It has a user-replaceable battery.

I was wondering -- how do you know when your battery needs replacing. I realize, of course, that if the battery doesn't hold a charge, it needs replacing. But are there tell-tale signs that start creeping up that indicate you need to order a replacement battery soon, before it gets to the point where the battery won't accept a recharge?

Also, what's the expected lifespan of a battery, assuming you charge it just once each day?

[hollis_f]

I have an hp1910. It has a user-replaceable battery.

I was wondering -- how do you know when your battery needs replacing. I realize, of course, that if the battery doesn't hold a charge, it needs replacing. But are there tell-tale signs that start creeping up that indicate you need to order a replacement battery soon, before it gets to the point where the battery won't accept a recharge?

Also, what's the expected lifespan of a battery, assuming you charge it just once each day?

The batteries don't die suddenly. As time passes they'll be able to hold less and less charge. So you shouldn't have to worry about suddenly needing a replacement.

How long does this take to happen? A lot depends on how you treat it. LiIon batteries like to be kept full. So keping the PPC charging while you're using it is the kindest way of treating it.

[maximus]

LiIon batteries like to be kept full. So keping the PPC charging while you're using it is the kindest way of treating it.

And that's is exactly why microsoft designed activesync with an embedded feature called 'unstability' .. so you have to try to sync many many times in a day, hence you are forced to put the PPC on the cradle several times a day also .... hence prolong the life of your li-ion battery.

Logic says, we have to thank microsoft for thinking ahead for the benefit of all of us, regular users. They are way smarter than all of us, so stop whining, and start praising them.