A 12 Volt battery, at less then 10.5 volts, doesn't not respond well, to say
the least.
10.5 volts is dead for all intents and purposes.
A fully charged 12 volt battery will read something like 13.2 to 13.8
depending on the type of battery it is.
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Moose
Sent: Sunday, August 24, 2008 3:24 PM
To: olympus@xxxxxxxxxx
Subject: [OM] Re: OT - One for our resident battery expert
James R wrote:
> It's a holiday weekend and a few jobs on the flat need to be done. My
trusty cordless drill turns out to be poorly. I apparently can't get a
replacement battery for it for much less than the cost of a new unit so I
searched the net for a remedy and came up with this...
>
>
http://www.instructables.com/id/Revive-Nicad-Batteries-by-Zapping-with-a-Wel
der
>
Well, it was at least entertaining. I wonder if I kept the dead battery
pack from my drill...
> ... Trouble is it's a 12v drill, but as the charger puts out 7.2v maybe it
would?
>
Have you considered that the trouble may BE that "the charger puts out
7.5v". I'd check it again. If it is only charging a 12v battery to 7.5
v, you would indeed have a drill acting like it was feeling poorly.
If you have no other chargers, (which seems unlikely on this list) a car
battery should be safe. Putting 12v across a 12v battery should be safe
for the simple reason that that's what the charger is supposed to do.
It's not like the 31v the video uses.
Moose
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