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The Guardian - UK
The Guardian - UK
Technology
Jack Schofield

Recharging an old Palm handheld (or similar device)

I can't get my Palm 515 to take a charge. I haven't used it for years but now want to revive it. How do I charge it? Don Cheatham

You don't! Palm handhelds and similar devices use lithium ion or lithium polymer batteries that often need to be cycled (charged and discharged) three or four times when new, before they operate at full capacity. However, these batteries are only designed to last between 18 and 24 months, after which the effects of oxidisation come in.

Also, when lithium batteries are discharged below a designated voltage, an internal protection circuit may prevent them from being recharged (see http://www.rebatt.co.uk/technicalinfo.shtml). Your battery is beyond its design life and has probably fallen below its designated voltage, so trying to recharge could be dangerous. Your best bet is to buy a replacement battery.

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