Running small batteries (1000mah or less), or batteries with small gauge wire have proven to increase this issue as they cannot properly absorb the voltage spikes from the esc as they're supposed to.

• Connectors are about 2 inches long. 

• These are not needed if running voltage under 4s

• These are not needed for any normal surface esc's such as Castle, Tekin, Furitek, Spektrum, Hobbywing, Traxxas, Axial, or other esc's that are originally designed for surface vehicles.