Broadcom started shipping new 802.11g and 802.11a/g chips that it says consume less battery life on notebooks then Centrino chips: A notebook can last 20 minutes longer with its modules, says Broadcom. The product will help Broadcom cement its relationship with laptop makers who are using its gear as a built-to-order option (Dell) or as a default (Emachines) instead of the Centrino module.