... 3.size can be customised 4. light ultra thin lithium battery 3.7V 20mAh with 4*22*55mm Company Information: Apollo ... format, light weight , large area, and flexibility in design.2.Easy customized,Energy density,High capacity.3.super slim ... design,Ultra-thin Cell, or Thin Cell, as thin ... Production line thin lithium battery 3.7V 20mAh with 4*22*55mm