A couple of years ago (Oct 2013), my husband noticed our battery on the PRC for our Mark IV Disklavier was weak. He had me order a replacement battery. It is still working fine! Here is the information for the replacement battery:
The original manufacturer of the battery (i.e. Sharp) has, apparently, stopped making the battery needed for the PRC. However, there is a manufacturer in China (Hong Kong) that makes an equivalent available via EBay. Shipping is included in the $16.95 price.
Fit Sharp Zaurus SL-C1000, SL-C3000, SL-C3100 battery
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Fit Sharp Zaurus SL-C1000, SL-C3000, SL-C3100 battery
US $16.95 New in Consumer Electronics, Multipurpose Batteries & Power, Battery Chargers
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Preview by Yahoo
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Background:
The Sharp Zaurus was a personal digital assistant (which reportedly influenced the Newton) and was produced from 1993 until 2007. The picture of one below shows that it looks very similar to our Yamaha PRC.
Sharp Zaurus SL-5500 runningOpenZaurus and OPIE, with docking cradle and stylus was produced around 2001. We purchased our Yamaha DC7M42 31-Aug-2005. You can easily see the PRC was just a custom version of this Zaurus line of personal digital assistants.
