stunthanger.com

Electric Stunt => Gettin all AMP'ed up! => Topic started by: petermick on May 06, 2014, 09:31:32 PM

Title: Alternate Charging Method
Post by: petermick on May 06, 2014, 09:31:32 PM

Instead of using my car battery to charge a 4 cell 2700 mah pack would it be possible to charge the pack using a 12 volt gel cell battery normally used in a flight box?

Thanks

Peter Mick

Title: Re: Alternate Charging Method
Post by: Tim Wescott on May 06, 2014, 09:46:47 PM

For a little while.  Do you know the mAh rating of your flight box battery?  Figure that you'll need about 1.2 to 1.5mAh out of that for every one that goes into your flight pack.

Title: Re: Alternate Charging Method
Post by: petermick on May 07, 2014, 11:02:00 AM

The flight box battery is rated at 7.2 AH

Peter Mick

Title: Re: Alternate Charging Method
Post by: Tim Wescott on May 07, 2014, 11:09:40 AM

Quote from: petermick on May 07, 2014, 11:02:00 AM

The flight box battery is rated at 7.2 AH

You'll get maybe two charges out of it.  Three if the battery works as rated, you have a really efficient charger, and your plane doesn't draw the pack down too much each flight.  I don't know if gel-cell batteries can stand routine deep discharge or not (someone chime in here!!!), but it certainly won't help the life of the thing.