Free Battery Monitor (sort of)
A recent post regarding use of a battery monitor voltage meter, prompted me to post my experiences. If you are already an Escort Radar Detector owner, you don't need to buy one, you already have one. ...
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Here is another (nearly) free option. Harbor Freight often gives you a cheapy digital volt meter with a purchase. I simply screwed one of my free ones to the cabinet and attached the leads to my +12V mains. To check the voltage just turn it on and read to the nearest 0.1 Volts.
