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Old 02-16-2014, 06:23 AM   #1 (permalink)
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¬*My 2008 6cyl Mustang has a new {last summer} battery.¬*The car has¬*been ¬*parked in my unheated¬* garage since Nov 1st. Every month or so I give it 2 hrs on a trickle charger 2 amp.

I notice today that the clock is dim, and the interior lights aren't working. How long can a I leave the trickle charger on?¬*¬*Can 2 amps fry a battery?¬*
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Old 02-16-2014, 07:19 AM   #2 (permalink)
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It depends on the charger. I use one that self-regulates when the batteries are fully charged only giving an occasional boost to maintain the charge. Some could over charge the battery causing the damage you describe
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Old 02-16-2014, 07:45 AM   #3 (permalink)
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If you plan to let the car sit for a few months at a time, just pull the battery and bring it inside
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Old 02-16-2014, 08:35 AM   #4 (permalink)
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If you plan to let the car sit for a few months at a time, just pull the battery and bring it inside



Not necessary if you use the right charger. I have battery mounted chargers on all my cars, when not in use I just plug them in and they're ready to go the next time. Pulling batteries is a pain in the butt
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Old 02-16-2014, 09:39 AM   #5 (permalink)
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Battery tender
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Old 02-16-2014, 10:10 AM   #6 (permalink)
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fredtal said Battery tender Correct, or battery minder they're all a type of charger
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Old 02-16-2014, 04:33 PM   #7 (permalink)
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Yup, battery tender/minder is the answer. I've got a Battery Tender Jr. It always worked well for me with my scooter that got parked for weeks at a time.¬*
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Owner 1967 Ford Mustang Convertible: 289V8, Cruise-o-matic transmission, vintage burgundy exterior, black interior and top, MSD Ignition, true dual 2.5 in exhaust system, Ford 9in rear. Owned since July 2013, in family since 1967.


DD: 2004 Ford F150 Heritage, single cab, bench, crank windows, 4.6V8, automatic, aftermarket flatbed, Dynomax cat back dual exhaust. Owned since 2006. 2010 Toyota Highlander, V6 AWD, three row, family truckster ¬*
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Old 02-17-2014, 04:23 AM   #8 (permalink)
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I have to park my DD outside so I rigged up a battery warmer with an onboard trickle charger that I plug in every night. Even with temp going as low as -20DF I haven't had even a hesitation when starting my car. I highly recommend the combo for cold weather starts
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Old 04-18-2014, 07:08 PM   #9 (permalink)
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A couple people have hit the nail on the head with a battery tender. It turns itself on and off as needed so as not to fry the battery or let it drain down too low. If you leave a trickle charger on too long (over a day) or skip a month you're going to do damage to your battery. A tender you can leave on indefinitely, longest I've seen was two years on a co workers boat battery. I would in your case recommend checking your battery posts and cable corrosion as well.







source: three plus years of selling batteries for a living.
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