Is it bad to charge batteries via a car inverter?

[fuzzybabybunny]

When I charge cell phones on the inverter they always seem to charge quicker than usual, but they don't hold the charge for as long. Any reason for this and is it harmful to the battery?

 

[Modelworks]

It shouldn't matter if the inverter is working properly.
Might want to check the inverter ouptut with a meter to make sure its not outside of the AC specs.

 

[BoomerD]

I have an inverter that I use for this all the time since my daughter broke my car charger...

 

[0roo0roo]

why dont you just use the ciggy charger?

converting dc to ac then back to dc for charging seems rather inefficient charge is controlled carefully in lithium ion by the controller otherwise boom.
so don't worry about it unless you got some generic battery.

 

[fuzzybabybunny]

I don't want to buy and have lying around a whole bunch of ciggy chargers. I had a smartphone, laptop, and MP3 player that I charge from one of two inverters.

The thing about inverters, and what brought about my question, is that reading the documentation it states that the inverter doesn't create a true sine wave. Just wondering if this would effect anything.

 

[Modelworks]

Originally posted by: fuzzybabybunny
The thing about inverters, and what brought about my question, is that reading the documentation it states that the inverter doesn't create a true sine wave. Just wondering if this would effect anything.

It could but its not very likely.
Most inverters use a modified sine wave, sort of a cross between a square wave and sine wave.
Chargers are ok with it as long as its not too far out of spec.