If you're running Sharp 3.13, you can get the CACkO kernel installed. I've done that on my 5500. It runs the improved battery app well enough. However, it will make a couple other things flakey, particularly by requiring that you suspend/resume a lot, especially before you charge and/or sync. Relevant thread is
here.
if ive been getting my research right, cacko is not for 5500 ??
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