LiPo for class F1E.
Batteries have the highest possible impact on today truthful 60C (not invented 100-200-300S).
Pack voltage: 11.1V 3S1P
Pack capacity: 2600 mAh.
Maximum continuous operating current: 156A
Pack Weight: 199 gr.
Pack Dimensions: 20×39×122 mm.
Internal resistance of one cell: 2-2.5 milliohms.
From experience I can say that the Chinese leadership in this class, set to block their boats from six to seven such batteries.
KV motors while, at about 3200/volt.
Motors size: type 1540.