Advantage,
Ultra-thin: could be assembled in credit card.
Flexible sharp: manufacturer doesn’t need to limit to standard sharp, could make different size to fit.
Lightweight: polymer Lithium Battery doesn’t need metal case for out package.
Improve safety factor, more stable in over charge, leakage ratio low down.
Disadvantage,
Compared with lithium ion battery, its cycle life is shorter and production cost higher. It has no standard sharp. Most of them are applicable to high capacity consume market.