I had the same problem with my Rabbit and the 5200 LiIon that came with the engine (don't know the brand but it was NOT a Duralite ???)
Anyway, I bought a
Duralite Lithium Manganese 2s2p pack which has a much higher discarge rate. Engine now starts great! Did hate having to shell out and extra 100+ to replace the factory pack. [
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