My dad wants me to verify I will not trash his expensive marine battery that he trickle charges all the time with a trickle charger. I was curious If i hooked his battery up to a wind turbine / motor. Right now, it is just a veryy small motor and produces around .3 watts or so. more / less. That's an estimate. On my multimeter, it reads around 3 ac volts. Is this safe to hook straight up to the dead battery, to get it to charge? Thanks!