Check the complete electrical chain
Match the transmitter protocol to the receiver and the receiver to the chassis electronics. A branded 2.4 GHz radio is not automatically compatible with every Mini-Z. Check the ESC’s motor type, voltage rating, connector polarity and required servo specification. Brushless KV describes speed per volt under ideal no-load conditions, not a universal measure of usable pace.
Respect battery chemistry
AAA NiMH and LiPo systems need different charging methods. Never substitute LiPo into a chassis designed only for AAA cells. Use the pack maker’s compatible charger, cell count and charge settings; balance-charge where specified. Charge under supervision on a non-combustible surface. Stop using swollen, damaged or unusually hot packs and follow local disposal guidance.
Install with room to move
Disconnect the battery before soldering. Use ventilation, eye protection and an appropriate iron; practise on spare wire first. Insulate connections and inspect for bridges or reversed polarity before reconnecting power. Route wires clear of gears, steering links and suspension travel. Calibrate the ESC as its manual describes, then perform a low-speed functional check.
Compatibility and a clean installation matter more than headline specifications.