Warming up the batteries

[Al Skierkiewicz]

Originally Posted by thelittlesister

Our battery will drop from 12-13 volts to 9-8 in 1 minute of just being plugged in no matter what the temperature is.
-Ally
316

Ally,
You have left a lot open to question. Does the battery drop with the robot turned on but not moving? It is normal for a battery to read 8-9 volts under load (while the robot is moving) after a minute of operation particularly if you are running the compressor and using a lot of air. When you stop moving and the compressor turns off, does the battery come back to 11-12 volts on your dashboard? Again this is normal.

If the battery draws down to 8-9 volts with nothing else running and stays there or gets worse, then you have a short or bad component on the robot. Start by pulling all the breakers and then putting them back in one at a time to determine which device is drawing the battery down.