20pcs 4S Single 3.7V 18650 Lithium Battery Capacity Indicator Module Percent Power Level Tester LED Display Board

Features 1 Intelligent power display panel tap the trigger switch to display display automatically closed after 3 seconds Note if you need to keep the light direct short circuit switch 2 Static power consumption 2 3 mA Its negligible3 Power indication The color of the lamp is green U6 6V25 led indicator is litU7V50 led indicator is litU7 5V75 led indicator is litU8V100 led indicator is lit Package Included 20 x 4S Single 3 7V 18650 Lithium Battery Capacity Indicator Module