Battery Problems

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  Battery (BT176) is "furry." Batteries can actually leak and destroy part of
  the motherboard, so replacement of corroded batteries is advised. Dalco's
  3.6V 3-pin battery, part #46875, is an almost-identical part: the pins and
  size are identical, but it is rated for 60 mAh rather than the A4000 stock
  battery's 40 mAh.