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Author Topic: Charging car battery from Hobbyking charger?  (Read 270 times)

krikey

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Charging car battery from Hobbyking charger?
« on: July 01, 2017, 12:11:22 PM »

I've done something stupid! I left my lights on the car and the battery is almost dead and won't turn over.

I don't have jump leads but do have a Turnigy Accucell 6 charger which I use for LiPo changing mostly. It does have a Lead Acd (Pb) charge cycle. The Accucell is rated to 6A max but I know that a car battery will draw at least 20A when turning over the engine.

Question: can I use my Accucell 6 to trickle charge my battery while it's in situ in the car?
« Last Edit: July 01, 2017, 12:13:03 PM by krikey »
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hpmc

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Re: Charging car battery from Hobbyking charger?
« Reply #1 on: July 01, 2017, 12:43:12 PM »

if you have a 4 cell lipo stick that across the terminals and it will start the car seen it done several times
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krikey

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Re: Charging car battery from Hobbyking charger?
« Reply #2 on: July 01, 2017, 01:01:15 PM »

if you have a 4 cell lipo stick that across the terminals and it will start the car seen it done several times

Gosh, not sure I like that idea. Isn't there the risk of explosion from the LiPo as its discharging quite quickly? You don't have any control over the Amps drawn if you wire a LiPo straight in.

Needless to say, I tried the Accucell 6 in Pb mode providing 2A and managed to get some juice into the battery after 20 mins. I disconnected the charger and the engine turned over and is now happily running on the drive, which I'll do for 20 mins or so.
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Coyote

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Re: Charging car battery from Hobbyking charger?
« Reply #3 on: July 01, 2017, 03:28:21 PM »

You can jump your car off using a suitably rated Lipo first to get some charge from the alternator going into it.

You don't have your car battery connected for this, just the lipo. Once the car is running then you can disconnect the Lipo  ( the alternator keeps the car ticking over ) and reconnect the positive of the car battery and the car will remain running and start the charge process.

Then you can drive to halfords and buy a car battery charger ;)

To charge up your car battery you are going to need a whopper of a lipo. They are normally greater than 45 ah batteries. Your advantage Lipo would only be good for a small part of a charge at best.
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