Battery charge Indicator. Directly connect this circuit board to you battery , positive to battery + and negative to battery - . It will show battery charge left. If 4 led glows then its 100% charge, if 3 led then 75%, if 2 led then 50%, if 1 led then 25%. And if no led then battery drain out and need to charge again.This module is for only 3.7v 1S lithium Ion or lithium Polymer Battery. not for lead acid B
1s 3.7v Lithium ion Lipo Battery Capacity Indicator
Product Dimension-
L X W X H - 22 x 8 x 44mm
Weight - 7grms
Country Of Origin : China