Canon Knowledge Base - Using a USB cable to charge the camera's battery (PowerShot G7 X Mark II)
2x Pack - Canon PowerShot G7X Battery + Charger - Replacement for Canon NB-13L Digital Camera Battery and Charger (1250mAh, 3.6V, Lithium-Ion) - Walmart.com
Canon Powershot G7 X III Review | ePHOTOzine
Amazon.com : Wasabi Power NB-13L Battery (2-Pack) and Charger for Canon PowerShot G1 X Mark III, G5 X, G5 X Mark II, G7 X, G7 X Mark II, G7 X Mark III,