Hello Larry,

you need a soldering iron to desolder the battery base pins from the board; they are welded to the battery. The best is, to desolder the base pins and to replace the battery by a battery holder where you can easily mount and exchange the battery later on, when you have the same problem again.

Regards,
Michael

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Es ist besser, die Steine seines Gegners zu opfern. (S.G. Tartakower)