3.7v 606090 4000mah lithium polymer battery for power bankPersonalized lipo battery customizationCell thickness:2-9mmCell width:10-60mmCell length ... can offer ideal voltage and capacity and size of Lithium battery pack you need. Scroll down the page and contact ... weightAdvantages1, High energy density2, High working voltage for single battery cells3, Pollution-free4, Long cycle life5, No memory effect6 ...