Extended Life [5200mAh 11.1V 6cells] Laptop Battery for Dell Studio 17 1735 1737 Series, fits KM973 KM974 KM978 MT335 MT342 PW823 PW824 PW835 RM791 RM868 RM870 312-0711 312-0712 312-0708 High quality laptop battery for Dell Studio 17 1735 1737 Series. Pls study the product desription below to make sure your original battery and laptop meet the compatibility of both the part # and models We are direct from manufacturer and all batteries are made of A grade cells. Shipping from OHIO, USA, 2 to 6 days delivery guarantee. High capacity battery certified by CE and RoHS. 100% OEM compatible! Warranty: 30-day money back & 1-year guarantee!