| > IIRC many automotive chargers put out something like 14.2 volts, which
| > probably will fry the hobby charger. However, most automotive 12volt
| > batteries that are not near the end of their economic life show around 13
| > volts when freshly charged. I would not use a hobby charger on a battery
| > while I was charging it. Red probably has better info, but I try to be
| > somewhat conservative with my choices.
| <snip> I would not use a hobby charger on a battery while I was
| charging it. <snip> Doug, I'm confused with this statement. Please
| explain. Do you mean you'd not use a "charger for a car battery " to
| charge a Li Poly battery? Not meaning to be a wise guy.
It's not my statement. No wonder you're confused :)
Car battery chargers can work via a number of different methods. Some
might be fine to use to power your charger, others might not. I
wouldn't risk it.
It is ok to power your R/C charger from your car battery. It's
usually ok to even use your car battery while your car battery is
being charged or even if your car is running (and therefore charging
the battery) though I seem to recall one charger somewhere (old, long
gone, probably for that reason) that wouldn't work like that.
| So it's all right to use a car battery as a power source for the
| Astro 109 charger when or if I get one. I couldn't find one anywhere.
| Now if anybody would tell me where one may be purchased now, I would
| appreciate it.
Personally, I'd suggest a Great Planes Triton charger instead if this
is to be your first charger. Similar price, similar specs (but only 5
amps instead of 8), but it can also do NiCd, NiMH and Pb batteries.
If you want the Triton, get it from http://www.towerhobbies.com . Be
sure to use an appropriate coupon code!
Don't get me wrong. Astroflight puts out good stuff, but the Triton
really does kick ass for the price.
Doug McLaren, email@example.com A closed mouth gathers no foot.