Post by Jerrymac on Jul 18, 2010 2:13:06 GMT -5
For those of you that might be wondering if you can field charge from your vehicle battery, I did a little test today to give you an example.
Being a mechanic at a Mack truck dealer, I am able to pick up good used truck batteries for free. I usually keep 3 of them hooked together in parallel in the back of my pick-up for field charging.
Saturday, while repairing my BH450 and my Gaui 425 I decided to bring a single truck battery into the basement to see how many lipos I could charge on it.
With the battery fully charged and reading 13.4 volts, I charged 2 2s 900mah, 2 3s 2100mah, 2 6s 2500mah, and 6 3s 3300mah lipos and the voltage of the truck battery only dropped to 12.6 volts. I probably could have easily charged twice as many lipos, but that is all I had that needed charged.
For anyone looking to field charge from a 12 volt battery, I would say to just go out and get a decent Deep cycle Marine battery and charge away, then just trickle charge it overnight when it gets low.
I certainly am not going to keep carrying all 3 of those truck batteries in the bed of my pick-up any more, now that I know a single battery will charge more lipos than I can fly in a day.
Being a mechanic at a Mack truck dealer, I am able to pick up good used truck batteries for free. I usually keep 3 of them hooked together in parallel in the back of my pick-up for field charging.
Saturday, while repairing my BH450 and my Gaui 425 I decided to bring a single truck battery into the basement to see how many lipos I could charge on it.
With the battery fully charged and reading 13.4 volts, I charged 2 2s 900mah, 2 3s 2100mah, 2 6s 2500mah, and 6 3s 3300mah lipos and the voltage of the truck battery only dropped to 12.6 volts. I probably could have easily charged twice as many lipos, but that is all I had that needed charged.
For anyone looking to field charge from a 12 volt battery, I would say to just go out and get a decent Deep cycle Marine battery and charge away, then just trickle charge it overnight when it gets low.
I certainly am not going to keep carrying all 3 of those truck batteries in the bed of my pick-up any more, now that I know a single battery will charge more lipos than I can fly in a day.
