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Old Mar 20, 2010, 06:33 PM
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how does one go about charging several batteries

Im a total newbie to heli's, so be gentle...
Ok, i bought my SR and currently have the original battery. have 4 more on order.
it takes around an hour to balance charge the one battery, so im wondering surely you guys dont hang about charging your batteries for several hours?
there must be a way of charging these simultaneously.
i have a pretty decent charger:
Etronix Powerpal Balance Charger-Discharger & Cycler
http://www.cmldistribution.co.uk/cml...lleryImage=1#G

And the battery on the SR is a 3s 1000Mah.
any help much appreciated.
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Last edited by vygec; Mar 20, 2010 at 06:41 PM.
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Old Mar 20, 2010, 07:03 PM
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http://www.rcgroups.com/forums/showthread.php?t=932319
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Old Mar 20, 2010, 07:10 PM
Nice, but watch this... oops.
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If you charger can put out some decent wattage, parallel charging is the way to go!

Bill
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Old Mar 20, 2010, 07:26 PM
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thanks, but that has seriously scared me off!
i was hoping i could purchase a few leads and plug in and go!
obviously not....
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Old Mar 20, 2010, 07:58 PM
Rsetiegerd Uesr
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Quote:
Originally Posted by vygec View Post
thanks, but that has seriously scared me off!
i was hoping i could purchase a few leads and plug in and go!
obviously not....
The charger companies would prefer you to buy a half dozen chargers of course...

If you want to parallel charge you need to roll your own. It is perfectly safe and many of us do it all the time. Follow Julez' instructions and you'll be fine.

Here is one way to do it that doesn't require all the boards and stuff that is in Julez' first post.. http://www.rcgroups.com/forums/showt...5#post12994761 Julez setup is more versatile But harder to make.

-Jay
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Old Mar 20, 2010, 08:11 PM
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Ira NZ's Avatar
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Joined Apr 2006
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You just need to be sure the batteries are at a roughly similar state of charge before charging them. I put a wattmeter on one battery when I plugged it into a parallel harness with another. 3s 2250s. There was a half volt difference and that was enough for the higher voltage pack to charge the lower at 5 amps.
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Old Mar 20, 2010, 09:26 PM
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how about this lead, will this enable me to charge two batteries at the same time safely?

http://cgi.ebay.co.uk/Twin-pack-char...item51901b87c2
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Old Mar 21, 2010, 07:20 AM
Rsetiegerd Uesr
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Quote:
Originally Posted by vygec View Post
how about this lead, will this enable me to charge two batteries at the same time safely?

http://cgi.ebay.co.uk/Twin-pack-char...item51901b87c2
That charges two 3s batteries in series... To charge in series your batteries much be discharged exactly the same, they must be pretty much identical both in specs and in state of charge. So if you have two identical 3s 2200s that you fly in series (to make a 6s pack) should come down exactly the same. They can be charged in series.

For parallel charging they just need to be similar. Two 2200mah 3s lipos of different brands that were flown in different aircraft can be parallel charged together. Of course the packs from the other example can be charged in parallel as well. So why not just parallel charge?

-Jay
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Old Mar 21, 2010, 07:43 AM
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Quote:
Originally Posted by vygec View Post
thanks, but that has seriously scared me off!
i was hoping i could purchase a few leads and plug in and go!
obviously not....
You do not need a complicated/expensive adapter with balance leads to do parallel charging. A simple "Y" cable with only power leads does the trick and is available from a variety of sources or easily built. If you are concerned about balance then check them every so often one at a time.
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Old Mar 21, 2010, 08:27 AM
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Julez's thread is somewhat overwhelming, but if you take it slowly and read carefully, it becomes much less so with time and understanding.

Try these two adapters. It will cost you about $20, but if you don't have the equipment and supplies to solder them up yourself it's worth it.

For 6 packs in parallel:
The main leads-
http://www.progressiverc.com/index.p...emart&Itemid=1

The balance leads-
http://www.progressiverc.com/index.p...emart&Itemid=1

And a nice video showing how to do it!
Parallel Charging 6 LiPo Batteries Using iCharger 206B (2 min 2 sec)
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Old Mar 21, 2010, 09:23 AM
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Southeast PA
Joined Jun 2007
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Your charger is 5 amps max and 50 watts max
A 3S 1000 mAh pack needs 12.6v @ 1 amp = 12.6 watts

With a parallel rig as shown in Davids video you could do 4 packs in parallel safely
3S 4000 mAh (4 packs in parallel) 12.6v @ 3.9 maps = 49.14 watts = 4 packs charged in a little over 1 hour (Can't do 4 amps because over 50 watts!).

VERY SAFE and EASY.

Bob
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Old Mar 21, 2010, 10:15 AM
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Yes, 4 packs at 1C (or very close), but just to be clear, that doesn't mean you can't use all 6 leads with 6 packs. It would just take longer, about 1 1/2 hour, but certainly less than 6 hours independantly, and even slightly quicker than doing 4 then 2 more, both at 1C
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Old Mar 23, 2010, 11:04 AM
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I really dont want to do this myself, i will mess it up..i know! ive seen ProgressiveRC's name mentioned a few times.
i plan on charging parallel. i have 4 * 3s 1000mah batteries all which have JST connectors for charging.
which leads do i need to get from progressivrc to enable me to charge correctly?
this is for my Blade SR.
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Old Mar 23, 2010, 12:36 PM
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It depends what connector the batteries have for the main discharge leads, Deans, EC3, or something else. Based on the link you supplied above I would guess Deans, but I'd need to know that for sure.

You'd need the items on the links I provide above.

This one (if they are Deans) for the main leads.
http://www.progressiverc.com/index.p...emart&Itemid=1

And this one for 3S JST balance connectors.
http://www.progressiverc.com/index.p...emart&Itemid=1

Just go down to where you add to cart and select 3S JST-XH from the drop down box and add them to your cart.
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Old Mar 23, 2010, 04:04 PM
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This is my battery, it has jst connectors not deans
http://www.e-fliterc.com/Products/De...rodID=EFLB0997
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