rechargeable battery problem?

[Janni Jensen]

Dear readers,

I have a rechargeable lady shaver that costs a little over $130, and after
just 2 years it won't power up anymore.

When I plug it in nothing happens, not even the display shows anything.
So I opened it up to look inside, where I only could find 2 AA
rechargeable batteries.

So I was wondering, if a rechargeable battery is dead, could that course
the shaver not to power up at all?


Hugs,
Janni

 

[Murphy]

Can you put a volt meter on the charger outputs and see if your getting
anything from it?

 

[Daniel Morrow]

That would probably depend on the shaver. Some devices still work even
if they have a dead battery as long as the device is plugged into a
standard ac outlet. I suppose those devices that don't continue
operating need to be small enough that the extra circuitry just
wouldn't be able to be stuffed into that small of a space - thus the
manufacturer saves some money. These rechargeable battery issues are
talked about in some of my posts here. Feel free to check them out if
you want. Later.

 

[Janni Jensen]

Can you put a volt meter on the charger outputs and see if your getting

anything from it?

Great idea!

Unplugged I measure 300mV over the batteries, and plugged in I measure 700mV.

I usually use the shaver with the power turned on, so I noticed that the
engine was slow one day. I thought it had something to do with the
batteries, so I unplugged it, and let it go untill the batteries were
empty. From this day, haven't I been able to make it work again.
Not even the display.


So I know the engine and display isn't broken. What could the error then
be?

Would a picture of the curcuit help?


Hugs,
Janni

 

[Janni Jensen]

That would probably depend on the shaver. Some devices still work even

if they have a dead battery as long as the device is plugged into a
standard ac outlet.

Okay, so this could be the case, or not. But what I do know is that they
are atleast not being recharged. I have had it plugged in for 2 hours, and
the batteries were still without power.

I suppose those devices that don't continue
operating need to be small enough that the extra circuitry just
wouldn't be able to be stuffed into that small of a space - thus the
manufacturer saves some money. These rechargeable battery issues are
talked about in some of my posts here. Feel free to check them out if
you want. Later.

Sounds interesting. I'll search.

Hugs,
Janni

 

[Martin Jeppesen]

I know nothing of electronics, but I do read crime novels=)

You say that the engine worked even after you noticed the shaver got slow?

If that's correct the shaver itself is still working, as it continued to
work using only the batteries.

To me it seams that the device that charges the batteries is broken. Or
something between the charger and the power cable.

If my guess it right, you should be able to remove the batteries, rechage
them, and put them back in, and your shaver would work -- but being
batteries only from now on.

Or you could find a 1,5V transformer and connect it to the battery
connectors. This would make the shaver cable only


I may remind you, that these are just wild guesses!!! You shouldn't trust
my words, unless you get them verified from other on the NG.

Finally. I think you should ONLY try my suggestions, if everything else
fails, and no one in the NG can locate the bug. My suggestions is not bug
fixing, but bug work-around.

I hope somebody can help you fix the bug

Martin

 

[JeffM]

2 rechargable batteries need >2.4Vdc to charge.
700mV==burned out charger.
If the batteries read 0Vdc, check them with an ohmmeter.
dead short==bad battery.

 

[Janni Jensen]

2 rechargable batteries need >2.4Vdc to charge.

If everything fails, would I then be able to remove the batteries like
Martin suggested, and use a transformer direct into the shaver?
If, how much V and A should the transformer deliver?

700mV==burned out charger.

Not a good sign for me, I see that.

If the batteries read 0Vdc, check them with an ohmmeter.

To be sure have I measured them again, but still 700mV on each.
7.2M Ohm and 7.6M Ohm when they are still in the shaver.

dead short==bad battery.

Can you conclude anything from these measurements?

Hugs,
Janni

 

[a]

Dear readers,

I have a rechargeable lady shaver that costs a little over $130, and after
just 2 years it won't power up anymore.

When I plug it in nothing happens, not even the display shows anything.
So I opened it up to look inside, where I only could find 2 AA
rechargeable batteries.

So I was wondering, if a rechargeable battery is dead, could that course
the shaver not to power up at all?


Hugs,
Janni

yes