Cool, thanks for the info! If they have those discs on, then hopefully soldering wouldn't be a problem as you say. I have a 50W temp-controlled iron, so that might be just about up to it. I'd like a decen,t long runtime with this machine so 1P is out of the question, but 6S2P might work. I've been eyeing up the Elite 4800 25C LiPos, which apparently perform nicely. A 6S pack would be tall, but I could lay it on its side in a custom-sized tray which would also prevent the bottom cell from having to deal with the weight of all the others in a landing.
Sorry guys, I know, I'm indecisive...both cells have good points! I'll probably go LiPo on this occasion like I say, but the A123 info is very helpful still.
Whats_Nitro: Right, I got it now! A DDOR setup won't work on the Havoc without re-designing most of the truck, as it's just a 3-gear lateral transmission; nowhere near as easy to install a DDOR as it is in a normal, 4WD truck. But thanks for the idea nevertheless!
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