Computer memory saver
Pro
Joined: Dec 2002
Posts: 597
Likes: 9
From: near Newburypot MA
So here's a VERY stupid Hypothetical question
If your car is running at idle and you hook up the 9 volt battery to the lighter, could you dis-connect the main 12 volt battery and would the car still run without issue ?
Not that I would do that !
My Guess - NOT
If your car is running at idle and you hook up the 9 volt battery to the lighter, could you dis-connect the main 12 volt battery and would the car still run without issue ?
Not that I would do that !
My Guess - NOT
Melting Slicks
Joined: Jul 2013
Posts: 2,012
Likes: 23
From: Anaheim CA
A slightly less stupid question is whether the 9V battery would survive the abuse of the car trying really hard to charge it up to 12V...
Pro
Joined: Dec 2002
Posts: 597
Likes: 9
From: near Newburypot MA
Ok, I'll bite: why not? Everything is running off the alternator at that point: it's pretty much the same as having a totally dead battery, jump-starting the car, and unhooking the jumper cables.
A slightly less stupid question is whether the 9V battery would survive the abuse of the car trying really hard to charge it up to 12V...
A slightly less stupid question is whether the 9V battery would survive the abuse of the car trying really hard to charge it up to 12V...
Actually my wireless doorbell uses a 12 volt mini non rechargeable - that could work better at keeping the computer & radio memory, but it's really tiny .... to little power (?)
Melting Slicks
Joined: Jul 2013
Posts: 2,012
Likes: 23
From: Anaheim CA
The thing is, a $50 battery tender is useful to have around anyway: even if your 'Vette is a daily driver, it's cheap insurance for when your car sits during a long vacation or business trip. But a $10 single-purpose widget that you use once every 3-4 years? Not so much.
