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Types Of Power Banks:
Most of the power banks available in the market consist of two types. One consists of Lithium-ions cells, while the other contains Lithium-Polymer cells.
Lithium-ion cell power banks have a higher energy density and are cheaper than the other. However, power banks containing Lithium-ion cells lose their charging capacity over the duration they are used and are bulkier.
On the other hand, power banks with Lithium-Polymer are expensive, but they are safer, and unlike Lithium-ion, they don’t lose their actual charging capacity with time. They also take less time to charge.