Question: how much does it cost to make a power bank?
Answer: For imported cells, a 2600mAh 18650 cell costs at least US$1.90, while cells with 3000mAh capacity can cost between US$2.40 to US$3.30. Cells with 3200mAh to 3400mAh will be priced between US$3 to around US$4.50. Li-poly cells with same capacities cost 20 percent to 30 percent more than conventional 18650 Li-ion cells.