ITEM NAME:Dual USB 5V 1/2.1A Mobile Power Bank 18650 Battery Charger PCB Module Board DIY.Batteries Type: liquid lithium-ion batteries (18650). USB Output: 5V 2.1A / 5V 1A(Dual USB interface). Micro USB input: 5V 1A. Note that the insulation between the battery and the circuit board, battery lead not to touch the circuit board,so as not to cause a short circuit.
