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zeropointbug · 12.16.2007, 05:37 PM

A standard lipo cell has a voltage of 3.7v nominal, an A123 cell on the other hand has a nominal voltage of 3.3v (this is why lipo's have higher energy denisty, as well, this is why A123's have super long life... low oxidation potenial, blah, blah)

The A123's are very safe, you couldn't TRY to light them on fire (believe me, I have tried!), so you don't need to use the automatic voltage cut-off.

a 3s A123 pack should work great, although, you may want to consider getting a 3s2p pack, as the VXL can draw up to 100amps, IIRC. A 3s pack can only deliver a 'solid' 540watts, you get a 3s2p pack, that goes to 1080watts... that will make the rustler fly. A 3s2p pack will also weight the same as a 7cell NiMH pack and have almost twice the usable energy on tap.

	(#2)
zeropointbug Z-Pinch racer Offline Posts: 3,141 Join Date: Nov 2006 Location: SK, Canada	12.16.2007, 05:37 PM A standard lipo cell has a voltage of 3.7v nominal, an A123 cell on the other hand has a nominal voltage of 3.3v (this is why lipo's have higher energy denisty, as well, this is why A123's have super long life... low oxidation potenial, blah, blah) The A123's are very safe, you couldn't TRY to light them on fire (believe me, I have tried!), so you don't need to use the automatic voltage cut-off. a 3s A123 pack should work great, although, you may want to consider getting a 3s2p pack, as the VXL can draw up to 100amps, IIRC. A 3s pack can only deliver a 'solid' 540watts, you get a 3s2p pack, that goes to 1080watts... that will make the rustler fly. A 3s2p pack will also weight the same as a 7cell NiMH pack and have almost twice the usable energy on tap. “The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens