How To Build a Battery Pack from A123 Cells - Page 7 - RC Groups
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Aug 09, 2007, 08:14 AM
WAA-08 Pilot Eventually
donjiskra's Avatar
THANK YOU!!!!!!! THANK YOU!!!!!!! THANK YOU!!!!!!!
Your descriptions and photos are EXCELLENT, I congratulate and appreciate your dedication to enlightening us.

I also appreciate all the follow up comments. You guys are important to help us understand and apply, thank's.
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Aug 09, 2007, 09:22 AM
Use the 4S Luke
feathermerchant's Avatar
Walt - Great job. Now I need to make a deans adaptor so I can borrow them from you.
Aug 09, 2007, 10:20 AM
Registered User
I also want to say thanks for posting this. I know this thread is over 7 pages long now, but the instructions are very helpful. Now I am waiting for my winning bid on eBay for a DeWalt Pack.
Aug 09, 2007, 11:14 AM
Registered User
I'm looking for some of the Dewalt BMS modules. I have been running my electric bike on the batteries and have managed to burn several out with shorts and overcurrent conditions. I have decided to bypass them for current draw and to use the BMS only for charging. But, I could use a few modules as spares once I repair the one dead battery I have. Let me know. I will pay $15 each.

Aug 09, 2007, 12:29 PM
Newbie but not too new!!
I have 2 you can get! You can have them both for $25 and shipping.
Aug 09, 2007, 04:15 PM
3DHobbyShop disciple
waltj2k's Avatar
Originally Posted by feathermerchant
Walt - Great job. Now I need to make a deans adaptor so I can borrow them from you.
Yes you do. They will be at the field on Saturday
Aug 09, 2007, 04:23 PM
Southern Pride
everydayflyer's Avatar

A123 Easy Stick Battery Builds

Aug 09, 2007, 04:24 PM
Ghia's Avatar
Aug 09, 2007, 04:35 PM
3DHobbyShop disciple
waltj2k's Avatar
Originally Posted by everydayflyer
Wow I thought I had checked out that web page. I guess I need to look more closely.

That page has a great explanation of how to build stick packs. Plus it includes wiring diagrams for balancing tabs.


Thanks for posting this Charles.
Last edited by waltj2k; Aug 09, 2007 at 05:45 PM.
Aug 11, 2007, 11:46 AM
tagged for later confusion.
Aug 14, 2007, 02:01 PM
Registered User
what are you using for solder paste ? please give me a name. thanks
Aug 14, 2007, 03:34 PM
Registered User
Great thread! Thanks for all the info. I now have 2 - 15s packs ready to go for my e620se raptor. Hopefully, it'll fly today or tomorrow.
Aug 28, 2007, 10:03 PM
Ghia's Avatar
thank you so much!
Aug 30, 2007, 10:57 PM
EDF all the way!
bruff's Avatar
This is great thread. Going to start using these cells in my large scale electrics. My one question, do you need to have a balance plug on the pack or can you just check the cells every now and then to maintan balance?
Aug 30, 2007, 11:25 PM
Southern Pride
everydayflyer's Avatar
do you need to have a balance plug on the pack
Jury is still out on this one.Some say yes and others say no.
I have two 3 cell,five 4 cell and two 5 cell packs,all have balancing leads except for two of the 4 cell ones which are in EMC SPT (solderless power tubes).
The two without balancing leads are new ( a few cycles) and the balance is all over the place.They may settle down after a few more cycles. A123 cells are kinda strange. These new ones when fully charged show voltages from 3.6 to 4 volts no load however if placed under a 5 amp. load balance is within 0.1 volts.


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