Anyone here ever used a battery float charger before? I picked one up from HF. I have a car that I let sit with a new battery I just put in, I’m not sure if I should use it or not for this car. Can it cause any damage to the battery? Also if they battery dies and no one is around to help jump it, ca…

Depends on the design, but you probably can’t jump start a car with just a float charger. But you might could charge the battery up enough with a floater if you gave it enough time. Usually you’d use a plain old battery charger for that though. There are battery chargers that also include a jump …

This is the one I got http://www.harborfreight.com/automatic-battery-float-charger-42292.html

“Maximum amperage output (amps) 400ma” if you had 40 Amp-Hours missing in your battery: 40 / 0.4 => 100 hours to charge

The purpose of these chargers is to make up for the constant drain all modern vehicles have even when shut off (ECM, radio memory, etc.) as well as self-discharge of the battery, and little, if any more. In other words, it won’t recharge your battery.

[image] NYBo: it won’t recharge your battery It won’t recharge it quickly… but given enough time it will bring a battery all the way back. I used just one of these devices to bring back a dead battery on a friends stored car I was looking after. The engine wouldn’t even turn over. Hook this u…

I keep an 85cca lawn tractor battery connected to a float charger similar to that and the voltage remains between 13 and 14 volts. An emergency light and radio are connected to the battery and occasionally run. If the power goes out the light automatically comes on. The current battery is 2 years ol…

Should you disconnect the float charger before starting the car?

in the ideal world, it would have an overload protection, but given it is from HF, I would disconnect it

I have an old battery maintainer, It stays at the cabins, not sure the amps but it usually takes about 8 hours to bring the deep cycle boat battery up to full charge, the battery is probably 12 years old, without charge 90hp cranks fine after sitting over winter, but I do it anyway. It is an outboar…

Battery float charger

Maintenance/Repairs

Tester January 19, 2017, 2:56am 11

Here’s the smart charger I use.

Set it to two amp charge rate, and sit back and watch the charger float the battery.

Tester

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Battery float charger

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