Battery advice for a 350 W motor (with graph)

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May 20, 2019
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My Firefly wheelchair attachment uses a 350 W ebike-type motor and it's time for a new battery. https://www.youtube.com/watch?v=CLyTHZHAFZM The current one is randomly cutting out after about 5000 km or 100-200 cycles (10S4P DT-Thunder style rated at 36V, 11.6 Ah). Obviously, more capacity sounds good, but this thread did a good of explaining how high-capacity cells aren't always best because of sag. https://endless-sphere.com/forums/viewtopic.php?t=42646

Absolute peak battery current is 22 A with 4-7A more common and below is a histogram of discharge currents during normal operation (gathered via customized VESC). Any advice on cell type would be appreciated! TIA :D
discharge.png
 
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