Power bank case suitable for Max 5 piece lithium ion battery of 18650 model no.
You can select battery also if want. Circuit has 3 USB port and one charging port of Type B.
You can use 5, 3000 mah battery to make 15000 mah power bank or 5 pcs 3000 mah battery to make 15000 mah battery. Circuit has indication of 4 led. 1 USB port is 2.1A and other is 1A rated.
Package Include-
1 X power bank case+circuit
Battery not include
6cells 18650 3USB type B Mobile Power Bank casing cabinet
To make the Power Bank You need to solder the battery with the Circuit. All positive terminal of battery connected in a same line and with the circuit positive. Same for negative lines.
Plz go through the video link for full details of how to make the Power Bank.