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landyacht318's avatar
landyacht318
Explorer
Feb 14, 2015

Frigid weather floating with non temp compensated charger

I got a friend up in Michigan who put a voltmeter on his 1.5 year old 'maintenance free' Starting battery and found it 11.95v, and claims there is Zero parasitic draw. He put his automatic charger...
landyacht318's avatar
landyacht318
Explorer
Feb 15, 2015
A hydrometer was my first suggestion to my friend, but it is a 'maintenance free' battery and he is not so eager to figure out how to access the cells, and was asking my opinion as to the battery condition given just the voltages and charger behavior.

Having no experience with battery charging at Sub zero temperatures, I thought I'd ask here.

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