EasyBuy Tech 90W AC Power Adapter/Battery Charger for Dell Studio XPS 13 16 1640 1645 1647 XPS 1340 L401x L501x M1210 M1310 M1318 M140 M1530 PP11

hi this is Sarah Dubois with laptop battery Express this nine cell dell battery is rated at 7800 milliamp hours or 87 watt hours and will give you about three to five hours of runtime depending on your energy use the mah or milliamp hour and the W HR or watt hour indicates how long a battery will run on a charge the higher the milliamp hour and watt hour number the longer the battery will run all of our batteries are brand new with Samsung Power Cells a Texas Instruments computer chip and are never used or refurbished if you're finding less expensive batteries on line please be aware that it's because they use cheap quality power cells inside the cartridge that can easily wear out in six months our batteries typically have a service life of three to five years all batteries from laptop battery Express come with a 30 day money back gaurantee and a full 12 month warranty all of our batter