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Electric Stunt => Gettin all AMP'ed up! => Topic started by: Motorman on August 03, 2013, 09:02:41 AM

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Post by: Motorman on August 03, 2013, 09:02:41 AM
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Title: Re: Why do I Need a DC Power Supply?
Post by: MikeCoulombe on August 03, 2013, 11:35:12 AM
I don't think you should plug this charger into the wall socket it is rated for max 24 volt DC.
110 volts would probably fry the whole thing, a popped breaker would be the least of your worries.
I'm a little confused with your question, are you asking if you can plug the battery? into the wall? which is a very BAD IDEA!!!!
Do some homework, there is a lot of good info here at SH use the search function.

Here is a link to the manual. http://revolectrix.com/support_docs/item_1369.pdf

"C" rating.
http://stunthanger.com/smf/index.php?topic=17790.0
Title: Re: Why do I Need a DC Power Supply?
Post by: Vincent Judd on August 03, 2013, 01:03:05 PM
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.  
Title: Re: Why do I Need a DC Power Supply?
Post by: John Cralley on August 03, 2013, 02:03:56 PM
I read the manual all it says is "Apply power source" are you telling me this thing doesn't plug into a wall socket? MM

Well Motor Man, you need to read the manual again. y1 Here is what is says on page 5:

                            -PowerLab 8 User’s Guide-

Operates from any 12–24V DC power source. Inputs and outputs are protected
against reverse polarity.


I agree with what Vince says above!!

There is a learning curve for going to electric and you should not be discouraged by that. CellPro PL8 will charge multiple batteries at the same time but you need a power supply that will be up to the job and you will need a parallel charging board or harness.
Title: Re: Why do I Need a DC Power Supply?
Post by: William DeMauro on August 03, 2013, 03:16:15 PM
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.
Title: Re: Why do I Need a DC Power Supply?
Post by: Fred Cronenwett on August 04, 2013, 06:35:39 AM
I use a charger that will charge a 3000 mah, 4S battery in an 1/2 hour at 3 amps. The charger plugs into the 110 volt wall socket at home. I decided to purchase a 2nd charger which means I can charge two batteries at once.

I looked at the more expensive chargers but ultimately decided to get a more basic charger, but get two of them so that I could charge multiple batteries at home at the same time. this way I have a spare charger if for any reason something goes wrong I am not out of a charger when I really need it.

http://www.commonsenserc.com/product_info.php?cPath=38_29&products_id=2100

Fred Cronenwett
Title: Re: Why do I Need a DC Power Supply?
Post by: PerttiMe on August 04, 2013, 08:53:42 AM
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".
Title: Re: Why do I Need a DC Power Supply?
Post by: Tim Wescott on August 04, 2013, 10:27:52 AM
From a half full/empty battery it might.

Hah!  I missed that.  More than half full, possibly.

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".

I should hope so!  LiPoly charging absolutely must be carried out such that individual cell voltages never exceed 4.2V or 4.3V (depending on the battery).  If you go over then you destroy the battery.  For that matter if you pull them too low you destroy 'em too -- they're temperamental, are our LiPos.
Title: Re: Why do I Need a DC Power Supply?
Post by: Tim Wescott on August 04, 2013, 10:29:21 AM
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.
Title: Re: Why do I Need a DC Power Supply?
Post by: 55chevr on August 04, 2013, 06:06:47 PM
You can't go wrong with one of Will's power supply.  I charge 4 packs at same time with his PS and a Power Lab 8 ... tough to beat this set up.


Joe