Casio has confirmed a technical problem with its new handheld computer - the Cassiopeia - which could lead to data loss.
The Microsoft Windows CE-based device, which has been shipping in the US since November, is due to be released in the UK in July.
Last week Microsoft and Casio confirmed the problem lies with faulty power switch which fails to power down the machine when switched off.
Scott Nelson, technical support officer at Casio in the US, said: "There is a problem with power management. Microsoft is addressing it and a joint statement will be issued soon on the availability of a patch."
The faulty switch drains battery power even when the machine is turned off. The power drain can continue for weeks before the computer alerts the user through a screen message. If the user ignores that message, the power drain will continue until the unit stops working completely. Total data loss could then result because the machine has no hard drive and all data is stored in the RAM cache.
Jim Floyd, product manager for Windows CE at Microsoft, commented: "This is not a catastrophe for our customers. Users who use their machines regularly will never experience the problem. We are expecting Casio to post details of the patch installation on its Web site over the next few days."
Geoff Durrant, national sales manager for Casio in the UK, said: "We are completely in the dark about this, but any UK buyers will be totally unaffected when the machine goes on sale in July."
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