7.4V 4000mAh 2S 130C Smart No Prep Drag LiPo Battery (SPMXDRB1)

The Spektrum Smart Pro-Series 7.4V 4000mAh 2S No Prep Drag LiPo Battery is built for 1/10-scale No Prep Drag racing, delivering high, consistent power with a 130C discharge rate and graphene LiPo chemistry. Encased in a rugged, impact‑resistant ABS hardcase that’s thinner and lighter for easier installation, this pack supports rapid charging with up to 5C and leverages Spektrum Smart technology for automatic charging when paired with a Smart charger, along with an auto‑storage feature that discharges the pack to a safe voltage after periods of inactivity to maximize life and performance.

The Pro-Series design includes an integrated microchip that stores essential details such as brand, chemistry, capacity, cell count, temperature, and charging cycles, plus a log of events like over‑heat or over‑charge. When connected to a Smart charger, these parameters are automatically relayed and preset charge, discharge, and storage profiles are applied, making charging quick and reliable while preserving battery health. For best fit, verify the vehicle’s battery tray size to confirm compatibility.