Moto Z Play and Mophie Battery Mod

This is one of the best phones I've had in awhile. The build feels solid and it has a good weight too it. I especially like the little extra weight that the battery mod adds. I didn't get a chance to fully charge the device last night and put it on the charger real fast before I took off. I left the house with the battery mod at 85% and the phone at 92%. I've streamed roughly 8 hours of music, and have used GPS apps (Runtastic and Ingress) for about 6 hours. I have also performed web surfing and minor games. I have the the battery mod set to efficiency. The batteries are currently 35% for the mod and 80% for the phone. I would have normally have put my phone on the charger at least once today. I would like to try this same test without the mod. The phone without the mod was lasting the entire day with moderate web use. I would hypothesize it could have made it today without the mod.