Disassembly of a DeWalt 36v Battery - Page 3 - RC Groups
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Oct 25, 2006, 10:00 PM
Registered User
What do you want to know about "balance connector"? or what's there to know about "balance connector"? tin the wire, solder the wire to the battery...

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Oct 25, 2006, 10:17 PM
Southern Pride
everydayflyer's Avatar
- / +- / +- / +- /+- (till last cell is reached then) +

- and + are the same as the power leads.

Drawing of LiPoly here but all series cells are the same.


Oct 25, 2006, 10:33 PM
Registered User
Thanks Charles, great link..!

Oct 25, 2006, 11:14 PM
Suspended Account
Originally Posted by retiredVTT
A follow up to this would be to show a "balance connector" being added to a pack...hint hint..!

Here is my removable balance connector for my 4S A123 packs made with Solderless Power Tubes.

Wire 1 to Main RED (+) lead
Wire 2 to case of battery 2
Wire 3 to battery bar at pack end
Wire 4 to case of battery 4
Wire 5 to Main BLACK (-) lead

Oct 26, 2006, 11:02 AM
Registered User
Nice...definitely a pic that is worth a couple hundred words..!

Is that a Blinky....believe so..!

Oct 29, 2006, 11:58 AM
Harry from Atlanta, Ga.
Old Sloppy's Avatar
Great thread.
Thanks for the detailed pix and explainations.
I need to order from Harbor Freight right away...

Oct 30, 2006, 03:05 PM
Registered User
Can you make 3S packs out of A123 cells? Seems like such a pack would be a good replacement for a 8-cell NiMh, but I've never heard of anyone doing anything other than 2-cells or 4-cells with A123.
Oct 30, 2006, 03:09 PM
Southern Pride
everydayflyer's Avatar
3S A123 here


and graph comparing to a 6C NiMH and 7C NiCad.

In truck comparison graph of 6 cell GP3300 and 3 cell A123 here.


Nov 02, 2006, 08:51 PM
Registered User
Originally Posted by LBMiller5
... Harbor Freight part number 93388 33-piece Security Bit Set...The normal price of these is $9.99 per set, but Harbor Freight is running a Half-Off sale...now the set only costs $4.99...
Just bought one; It's down to $2.99 now.
Nov 02, 2006, 09:10 PM
Registered User

Get a complete selection of bits that handle tamper-proof fasteners, including tri-wing, Torx, spanner bits and hex bits.
Bit length: 1''
Magnetic bit holder
Handy PVC case
Includes: Spanner bits: #4, #6, #8, #10; Torque bits: #6, #8, #10; Star bits: T-8, T-10, T-15, T-20, T-25, T-27, T-30, T-35, T-40; Tri wing bits: #1, #2, #3, #4; Hex bits: 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm (metric), and 5/64'', 3/32'', 7/64'', 1/8'', 9/64'', 5/32'' (SAE)

ITEM 93388-5VGA

SALE $2.99

sure 'nugh,,!

Nov 03, 2006, 08:55 PM
Eject! Eject! Eject!
AeroDude's Avatar
got my Dewalt pack today, really easy to decompose and remove the batteries from the pack, constructed the ten cells into two 4S1P packs and one 2S1P pack, I also made a parallel plug to connect the two 4S packs into a 4S2P 4600 Mah pack for my 55" F-4U. I also installed balance plugs into the 4S packs. I tested the individual voltage on all the cells and they were all balanced at 3.26 volts each. I did a quick test charge on the 2S pack until the voltage got over 7.2 volts, and added around 1000 mah. I used my Triton charger, selected the Lithium Ion setting, 7.2 V and 2.5 Amps (max for LiPo mode). I was affraid to let it charge much above 7.2V. The Triton charges the LiPo's up to 4.2 volts per cell. I need to be sure that the triton will charge the A123's without destroying them.

Nov 03, 2006, 09:45 PM
Registered User
A friend "puffed" a 3S lipo pack when his Triton took it up to 15 volt, not sure why, so keep an eye on it ,maybe get a LipoDapter to put in series with the Triton...

Nov 03, 2006, 10:19 PM
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AeroDude's Avatar
I have never had the Triton overcharge a LiPo, had it for almost 2 yrs and it has worked great, I need to let it continue charging the Li-Ion cell to see where it cuts off at. It uses the same strategy to charge LiPo's and Li-Ion, it tries to mantain a constant voltage (set for the number of cells up to 4) at the programed amperage, as the pack approaches capacity/max voltage the amperage reduces to prevent overcharge, so I assume if I let it go the charger will charge the Li-Ion packs up to 4.2 volts/cell.

Nov 05, 2006, 03:30 PM
MaxAmps CMO
JAM's Avatar
AD How Did your Triton do on the cells.........I have one and can get the Dewalt pack through the wifes work with her discount.........but I'm not gonna do it at this point if I have to purchase a new charger.....Please let me know.

Nov 05, 2006, 05:23 PM
Sky Pilot
still4given's Avatar
I just split my pack yesterday. I made one 4s and two 3s packs. if you look at the way the connections are run you can get two flat 3s and one square 4 pack by just cutting the right tabs. I used the two 3s packs in series to power my HXT5052 . It worked very well. I haven't wired balance taps in yet. I charged the cells on NiCad first and just watched the voltage. I found you have to be on your toes because it rises slowly until it gets to 3.6V but after that it rises very quickly. After the first flight, I charged the two 3s packs in series on my Pro-Peak Prodigy II as a 5s lipo pack. It takes an hour when charged as a lipo. I haven't used the 4s pack yet.

Blessings, Terry

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