>     "An alternative to zapping is that you can apply
>      a high (eg 15V) voltage to the cell while
>      keeping a very close eye on a voltmeter."

> I'm not going to recommend nor try this approach

I understand your caveat. It does work but you DO NOT
wander off and make a cuppa or answer the phone.
Immediately the voltage starts to rise you disconnect
the 15V. Zapping is a safer option

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