Casio and Compaq Computer will post a patch tomorrow that fixes a bug on their Handheld computers (HPCs) running Windows CE. The bug causes the batteries to drain when the unit is off, and it only affects the Casio and Compaq versions: other HPCs do not suffer from this problem.

Casio markets an HPC called the “Cassiopeia.” The Compaq unit is known as the “PC Companion”: they are essentially the same device.

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Casio Cassiopeia

Compaq PC Companion