i run a 120 amp esc in my cat with a 8xl on 4s with a s215 which is close to a x640 so dont think the amp draw was to high imo
but i only run for around 2 min,if your running for a whole pack and have 5000+ mah then that could cause damage
but i only run for around 2 min,if your running for a whole pack and have 5000+ mah then that could cause damage
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