3.7V-29.4V 18650 Li-ion Lipo Lithium 12V Battery Level Indicator Tester Capacity Tester Meter 1S 2S 3S 4S 5S 6S 7S 10S 13S 17S 20S

Feature: Durability:High-quality materials ensure long-lasting performance Ultra-Thin 5-LED Display:Clear visual power indication (20% increments) with sleek modern design Foolproof Installation:Built-in reverse connection protection prevents damage from wrong wiring Wide Compatibility:Lithium/LiFePO4/Lead-Acid batteries,various instruments, portable devices, power banks, electric vehicles, balance bikes, unicycles, etc Specification: Working current:15mA Allowable error:2%; 4-stage power:25% 50% 75% 100% Working temperature:-10~65 Material:Plastic Color:White Lead length:15cm/5.91inch Size:4cm*1.5cm*0.25cm Package Included: 1 x Battery Display NO Retail Box. Packed Safely in Bubble Bag.