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This calculator came with the battery spring tabs removed, but an AA nimh rechargeable with a flat (-) terminal fits. Is it safe to use the charger with this set of rechargeable batteries in place?
(05-04-2019 02:40 PM)Wyatt_Irk Wrote: [ -> ]This calculator came with the battery spring tabs removed, but an AA nimh rechargeable with a flat (-) terminal fits. Is it safe to use the charger with this set of rechargeable batteries in place?

It isn’t risk-free to use that calculator’s charger with the *intended* batteries.
If the modified calculator loses contact with the batteries while plugged in and turned on, it will smoke the ACT.

If you want to do this instead of charging off-board, I would at least be sure it is kept tuned off while the charger is plugged in.
Is there anyone available who can restore the correct tabs to the calculator’s terminals?
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