RAD POWER BIKES RADRUNNER / RADROVER / RADCITY (SEMI-INTEGRATED BATTERY) Power Battery Fuse Replacement Blown

10 Amp ATM Mini Blade Fuse

The charging circuit is highly susceptible to transient short circuits caused by the proximity of the positive and negative terminals within the charge port. A common mechanical failure occurs when the metal battery key or other conductive debris bridges these terminals, causing an instantaneous current spike that exceeds the 10A thermal threshold of the fuse.

40 Amp ATM Mini Blade Fuse

The discharge circuit fuse fails when the electromechanical demand from the hub motor exceeds safety parameters. This is often triggered by high-load scenarios like steep inclines or when a pinched wire in the downtube harness creates a short to the frame, causing the fuse to sacrifice itself to protect the lithium-ion cells from a rapid discharge event.

Main Wiring Harness

Persistent fuse blowing after replacement typically indicates a hard short in the wiring harness. Mechanical abrasion or 'pinching' of the cables near the folding mechanism or downtube entry points compromises the insulation, allowing the high-voltage supply line to contact the bicycle frame or ground wire.