Battery Charger Setup Question

Does anyone here use a power inverter at the airfield hooked up to your car and plug a battery charger into it? The reason I ask is that I'm currently
looking for the charger I will need to buy and not sure if I should get one specifically made for auto use or just buy a good one made for home use and go the inverter route.
Peter
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Well I tell ya......
I was looking for a battery charger that could be used both at home and on the field. I was really more concerned with draining out my cars battery, but then someone corrected me out at the park and told me that my car battery has aproximately 450amps, and 550cca, so the .7 that I would draw out of it would be pretty negligble.
So my LHS had a triton only car charger (hook it up to the car battery) or a MRC superbrain 969 (yes, yes, I know about them now and lipoly batteries, but Im not planning on charging lipoly with it), that does both, so I plug it into the house outlet at night and plug it into the car battery by day.
Now the thing that the LHS owner told me is that if I go with the triton, I can plug it into the car battery, but buy an adapter for the house at an additional $80.00 which would have made it $200.00 plus tax, so I opted for the MRC since it came with both a power adapter for home use and a plug to attach it to my cars battery.
But if I had it to do over again, I'd probably shell out the extra money and get one that plugs into the car battery, but buy an adapter for it for home charging.
The point being that you can get usually find a good one that plugs into your car battery normally, as well as find a home power adapter so that you can use it at home, and skip the inverter all together when on the field, after all one less thing to carry in your car.

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wrote:

One thing to be aware of about inverters . . . many have a true square wave output, and that tends to drive wall warts and other inductive types of power converters 'round the bend - the converters (wall warts) can get _really_ hot when fed square wave "a/c".
Many newer (more recently designed) inverters have an output wave form which consists of many discrete individual steps up and down, not just a square positive/negative form - these newer inverters are _much_ easier on inductive loads like wall warts. The transition from zero to positive max or zero to negative max looks a lot more like a sine wave, as in true a/c.
One approach is to get dc input chargers, so you can plug directly into a cigarette lighter outlet or to the car's battery, and also get a 12 volt power supply for home use. The power supply will prove to have many other uses besides driving chargers.
You can also modify an old PC switching power supply to function as a bench power supply - several web sites have instructions for doing the conversion. Operable used PC power supplies can be had for a couple of bucks if you look around.
dc input chargers are less expensive, and one decent power supply can support several chargers concurrently.
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Screwing around with inverters adds both unnecessary expense AND complexity. Why not just get one of the chargers that are designed for 12v use (Alpha4, Miniron, etc.) and be done with it? The Alpha4 comes with a power supply, while you have to supply your own power supply with the Miniron. Other (12v) chargers may or may not come with power supplies, but they're not that expensive if you shop. This way, you've got your power supply to leave at home on the bench and then you can plug either into your 12v/7a field box battery at the field, or just plug into your car battery at the field. Either way, it makes things much simpler.
MJC

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Get one that works on 12v then get a power supply to use for it at home. I would stay away from using an inverter with your charger.
John VB

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peter walker wrote:

I do the other way about: Use a field charger at home on an ex-CB 13.8v power supply.
Its cheaper than an inverter I think.

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I wasn't aware that there were any good chargers that ran directly off of AC.
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110V AC Ace Super Digipulse Multi Port Battery Slow-Charger http://radicalrc.secure-mall.com/shop/index.php?shop=1&catX&cart 6613
AC/DC Chargers http://www2.towerhobbies.com/cgi-bin/WTI0095P?FVSEARCH=LXCLD5&FVPROFIL=++&search3=Go
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXAVN1&P=ML
http://hobbypeople.net/gallery/130110.asp
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