I then carried the battery out to my garden shed, which is unheated, to mimic a boat during the winter here in Maine. I suppose I could have just carried it up the ladder, and into my boat, but no sense in breaking my back, the temps are the same.


I then took my first open circuit voltage reading about ten minutes after discontinuing the charge. It read 13.77V and represents a "surface charge" that has not yet dissipated.


I placed my cell phone next to the DVM to try and capture the date.