Amazon.com: 6GTPY Laptop Battery 97Wh for Dell XPS 15 9560 9550 Precision 5510 5520 M5520 Replacement for 5XJ28 i7-7700HQ 5D91C Laptop [Longer Model Not for Laptop with SDD/HDD] : Electronics
Amazon.com: 97Wh 6GTPY Replacement Laptop Battery for Dell XPS 15 9550 9560 9570 Precision 5510 5520 5530 M5510 M5520 Standard Rechargeable Notebook Series Li-ion Battery Fit For Type 451-BBYB GPM03 5D91C 5XJ28 : Electronics
Dell XPS 15 9550 battery
Dell XPS 15 9570 Review: A 6-core Core i7 makes it all worthwhile | PCWorld
Battery Life and Charge Time - The Dell XPS 15 9550 Review: Infinity Edge Lineup Expands