My XR, bought Oct 27 2018, has 92%. I charge with the iPad Pro 10,5 charger exclusively now, previously I charged it with the iPad Air 2 charger. Basically, it's always a wired charge with an iPad charger.
After a full day, the phone is at about 50%, plus/minus a couple of percentage points. If it's a weekend and I don't have calls and generally use the phone less, it lasts noticably more, so standby is good.
As for usage, I always have LTE, location services and Bluetooth on, I use Airpods (haven't used any wired accessory in a long time) and mostly use stock apps (hardly any battery consuming apps). No social media whatsoever.
If I conserved battery or basically paid any mind to how quickly it depletes, I could make this into a two-and-a-half-day phone. I'm very satisfied with battery life and peak capacity after nearly two full years. I reckon it goes strong for another year before I swap out the battery.