Dell 9yxn1 battery reviews: 29Wh 14.8V Dell 9yxn1 laptop battery power supply laptop models/PN: Dell 9yxn1, ww12p, 9yxn1, ww12p, extended battery life. 29Wh Dell 9yxn1 battery Original Dell 9yxn1 battery 29Wh, spare Dell battery 9yxn1 for business and entertainment. www.dell-laptop-batteries-adapter.co.uk/dell-9yxn1.html