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Dave_s Dave_s is offline
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Default Ni-Cad vs Lithium batteries

Robert Green wrote:
"Dave_s" wrote in message
...
I have a model 2207 3.6v SKIL Twist Cordless Screw Driver with a battery
pack that won't
run the driver. Charging only makes the pack feel warm. No load voltage
measures 4.034 volts.
Souinds like you folks have succeeded in opening the SKIL battery pack
to replace the three NiCd cells
and reuse the battery pack? Replacement cost for battery is $25
including shipping. I have tried but cannot see how to open the pack.


These are 3.6V units and can leave the charger as hot as 4.3V. Your voltage
sounds as though the pack is still good.

This model of screwdriver is infamous for its bad battery contacts deep
within the guts of the screwdriver (I own many which is why I know).


If you can give me an estimate of the current drawn by screw driver, I
can measure the battery voltage while drawing that current.

Does the screw driver draw approximately 1/2, 1 or 2 AMPS while
driving a screw (under load)? I can how much the 4.0 volts drops under load.

Thanks, Dave_s

--
Bobby G.