Product Description: Compatible P/N.: NP03XL HSTNN-LB6L 760944-421 TPN-Q146 TPN-Q147 TPN-Q148 TPN-Q149 Fit for Laptop Models: HP Pavilion X360 X360 11-K047Tu 11-K048Tu 11-K049Tu 11-K050Tu 11-K051Tu 11-K052Tu 13-a000 13-A010DX 13-b116tu(J8C75PA) Envy 15-U010DX 15-U337CL 15-U050CA Before use: For the new battery , we suggest that all of our customer should full charge it by AC power adapter, because takes a long period, the capacity was strain out by inner PCB circuit, in order to protect your battery life, you can full charge to 100% and drain to 1% 2 times,then the capacity will recover.Charge the battery regularly, at least once a month. Store: full of electricity long-term preservation can bring security hidden danger, the most ideal preservation Approach is to build the power usage to 40% and then stored in a cool, dry place, big About 20 degrees Celsius is the ideal temperature. Buy with confidence! 12-Month Warranty (full refund in 3 month+free exchange in 12months) Ship next business day 24 x 7 Email Support 8-hr x 5-weekday Call Support