Dell laptop Battery for inspiron 300M series

Dell laptop Battery for Vostro 1720
Dell 6-Cell Lithium-Ion Battery for Dell Vostro 1710/ 1720 Laptops
vos 1720     Technology   6-Cell lithium ion
  Capacity   56Wh
  Warranty
  1 year
Dell 8-Cell Lithium-Ion Primary Battery For Dell Vostro 1710/ 1720 Laptops
vos 1720 1     Technology   8-Cell lithium ion
  Capacity   77Wh
  Warranty
  1 Year