Thanks for that.
Quote:
Originally Posted by sosidge
Unfortunately I don't know enough about the LiFePO4 cells to comment on how they can handle high current draw. I know that they are more robust than LiPo cells, which is why Tamiya have made a pack of them which is a direct fit in a normal car - but the capacity of that cell is only 2200mAh, which doesn't compare very well with the 5000mAh+ available from LiPo at present.
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I can help there - they appear to handle high draw very comfortably -
indicated as 30C continuous here - and a standard 2S2P (6.6V 4600mah) pack weighs in at 330g, more than a comparable Lipo but less than a NiMh. Depending on class, it may be possible to run a 2S1P pack, weighing 170-odd grams, and recharge it nearly completely between runs (can handle 8-10 Amp charge rate).
Under load, each cell drops a little voltage, but deliver a steady 3v until almost completely discharged.