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GRUNDIG SHAVER - battery problem?

This is a handheld shaver , typeGRUNDIG BETA G8234 I would say late 80s vintage, a relative dug it out recently after about 8 years' nonuse and found it wasn't working.

I plugged it in and the charge light comes on, but the unit would not react in 'on' mode, even with the mains lead connected. Having opened it up, the two NiCad cells have deteriorated. I have two questions:

  1. is this likely to be JUST a matter of changing the cells? if so, why did the thing not work off the mains? Is it normal in certain shavers for the power not to be connected to the motor in any way, but the motor to be wired via the charging circuit ?

  1. Are these cells likely to be 'standard' 1.2v cells? no voltage ref is visible.

here's hoping....

-B.

Reply to
b
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probably will work if the batteries are replaced. The charger doesn't deliver enough current to drive the motor is my guess why that didn't work.

Reply to
PeterD

Agreed, the charging current has 24 hours to charge the batteries for a 5-minute shave, so figure out the current ratios. New nicad cells should solve the problem.

Reply to
hrhofmann

Yes. If a cell is shorted, the power supply won't be able to deliver full voltage to the motor with the cell in place. The power supply is designed to survive this, since it's a common failure mode, but it won't work until the cells are changed and at least partly charged up.

Yes.

(I'm speaking on the basis of experience with Norelco (Philips) shavers.)

Reply to
mc

You might consider replacing the cells with NiMH cells. They'll take longer to charge, but they'll run longer.

Reply to
William Sommerwerck

thanks very much for the responses. will replace those cells. they have spot welded contacts for pcb mounting so normal AA won't work. will look into NiMh cells - but price is a major factor, as the guy doesn't want to spend more than the bare mimimum on an old device like this!

-B

Reply to
b

Measure them carefully before committing, as sometimes, the cells in shavers are not *quite* the standard size that they *appear* to be ...

Arfa

Reply to
Arfa Daily

good point Arfa, thanks.

-B

Reply to
b

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