Cheap And Discounts 1S 2S 3S 4S 18650 Lithium Battery Capacity Indicator Module LED Indicator Power Level Display DIY PCB Board Module Li-po Li-ion Wholesale. Buy Directly From Merchant Aideepen ELEC&Lifes Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.