For 5.2" Lg Google Nexus 5x Back Battery Cover Rear Door Housing Case Replacement Parts For Google Nexus 5x Battery Cover - Mobile Phone Housings & Frames - AliExpress
Turns out the G2 battery mod works with the 5X too, and it fits a lot better : r/nexus5x
Google Huawei Nexus 6P Replacement Battery with Free Tools Set, HB416683ECW, 3450mAh - Newegg.com
Disassembled Google's "Nexus 6P" apart, not only looks but also contents inside - GIGAZINE
Huawei Google Nexus 6p Battery Replacement - DIY - YouTube