Quote:
Originally Posted by Arnold
OK thanks, I found this ( photo.JPG) in my garage, is it good? I have no clue how to use it :-) Simply plugging it in and connecting the + and - of the battery?
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no, that's just a traditional battery charger. it might trickle charge after the full charge, but trickle charging can end up over charging your battery as it does not monitor after full charge. typical for battery chargers, when the battery is full they switch to a low amperage charge... aka trickle charge.
battery tender floats after the charge. it monitors the amount of charge in the battery and only when it detects drain does it charge again till full.
a battery left unplugged looses charge over time. does not drain as fast as it being hooked up to the car and security system draining it, so that's the 2nd best option. i personally do not do this though for various reasons.
if you have power where you are parking, it would be smart just to hook up a battery tender.