Lithium-polymer is slowly replacing lithium-ion in the smartphone industry due to its superior safety, form factor versatility, and weight attributes in high-end and mid-tier devices. Although more affordable designs and handsets with very large cell capacities will likely stick with lithium-ion battery technology for a while longer.
Li-poly is safer, by comparison, which is particularly important in these days of super-fast charging technology. These batteries also have a very low self-discharge level, so won’t go flat when you’re not using them. However, this comes with a higher price tag, a shorter life-span, and a lower capacity density. Although, the lightweight nature of lithium-polymer batteries results in an overall better energy density per kg.
All the powerbanks and chargers offered at FITIT world are only Li-polymer batteries