LB1 High Performance Battery for Dell Inspiron 17-3721, 17-3737, 17-5721, Part #: DJ9W6, G35K4, N121Y, V1YJ7, W6XNM, XRDW2 Laptop Notebook [6-Cell 4400mAh 11.1V] LB1 High Performance&reg; battery for Dell Inspiron 17-3721, 17-3737, 17-5721, Part #: DJ9W6, G35K4, N121Y, V1YJ7, W6XNM, XRDW2 are environmentally friendly and certified by RoHS to be free from mercury - lead - cadmium - PBDE and PBBs. LB1 High Performance&reg; Commercial Grade Laptop Batteries for Dell Inspiron 17-3721, 17-3737, 17-5721, Part #: DJ9W6, G35K4, N121Y, V1YJ7, W6XNM, XRDW2 are custom manufactured to be 100% compatible and optimized for your Dell Inspiron 17-3721, 17-3737, 17-5721, Part #: DJ9W6, G35K4, N121Y, V1YJ7, W6XNM, XRDW2 laptop Dell Inspiron 17-3721, 17-3737, 17-5721, Part #: DJ9W6, G35K4, N121Y, V1YJ7, W6XNM, XRDW2 High Performance notebook battery utilizes high quality grade "A" cells for higher performance longer life and more reliability. Dell Inspiron 17-3721, 17-3737, 17-5721, Part #: DJ9W6, G35K4, N121Y, V1YJ7, W6XNM, XRDW2 High Performance meets and/or exceed OEM specification and will not void your original manufacturer warranty. Batteries capacity: 4400 mAh | Chemistry: Li-ion | Cells: 6 | Voltage: 11.1 Volts | wHr: 49. Fast charging. Low power consumption. Built-in protection circuit ensures both safety and stability. 100% Customer Satisfaction.Fast Same-Day Shipping by 18:00 PM PDT.30-Day Money Back Guarantee. 18 Months Warranty. Exclusive $100000 Product Protection Plan! Satisfies Government - School - Health care enterprise and Corporate account purchase order requirements.