????Lipo Battery Volt Tester 1–8S Buzzer Alarm RC Drone Car Boat Li-ion Li-Fe Tool
$2.29
Compatibility : 1–8S Lipo / Li-ion / LiMn / Li-Fe batteries. Ideal for RC hobbyists, drone pilots, and electric vehicle enthusiasts. Audible buzzer + flashing red LED. Alarm Function Alarm threshold: OFF to 2.7–3.8V.