Re: Dallas DS1216 Smartwatch repair
It may make sense to connect the new battery via a schottky diode. This will lower the voltage applied to the internal dead cell and make it less likely to fail disastrously or indeed drain the new battery. It will also prevent any fault voltage coming out from the chip from potentially driving reverse current through the new battery.
It's beginning to sound like there may be a market for carefully recelled parts like this!
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