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MM, you need to do a little more research.  There is a ton of information on this site and also on RC Groups about all the various types of battery chargers that are available.  Some run strictly on DC power, some run on both AC & DC.  The particular charger that you're talking about is a good charger, but it will not run on household current.  the specs call for an input voltage of 10-32 VDC.  What you would need to do is to buy an external power supply (again, do some reading, there's a million different types) that would take your normal 110V household current and step it down to an acceptable level to run this charger.  Some guys just run them off of deep cell marine type 12V batteries that they can then recharge.  You can also run it off of your car battery, but be careful and don't drain your battery, or you might be looking at a long walk home.

Again, do the research before buying.  If you're serious about charging 4 batteries in one hour, you're going to need a pretty good charger.  There are chargers out there that will charge multiple batteries, but make sure that they have the ability to meet your needs power wise.  

One thing that I have learned over the years is that it's not a good idea to try and save the most money when it comes to buying battery chargers.  IMHO, better chargers usually mean more money, but will most likely offer longer life and much better charging results.  When charging multiple cells, and multiple batteries, the key is having everything balanced.  The better chargers will usually give you better results, but then again, you mileage may vary.  Hopefully this discussion will not evolve into an argument over who makes the best charger and power supply, because there are a lot of good ones out there these days.  A lot of times, it's a matter of personal preference and maybe a good or bad experience.  I've been flying electric powered R/C planes for probably 10 years now and have purchased a bunch of different batteries, chargers and power supplies.

Good luck in your search.  

You can run the PL 8 off a 12 V source for field charging or even home charging but to get the maximum out put out of it, it does require a powerful 24v power supply. If you or anyone buys the PL 8 , it is also a good idea to get the FMA link so the charging programs can be customized and the charger can be updated as newer versions of software are released.

I use a charger that will charge a 3000 mah, 4S battery in an 1/2 hour at 3 amps.

From a half full/empty battery it might.
3000mAh means 3 amps for one hour (or 6 amps for 1/2 hour), except many smart chargers manage to do the early part of charging at higher current and then ramp down to squeeze in the last "drop".

Motorman, did you get your question answered to your satisfaction?

The bottom line is that house current is just wrong for a charger designed to clip onto a car battery, and visa-versa.