We usually don't like barriers between us and battery replacements, but we might make an exception for this modular charging port. That'll be a painless replacement!

Since we got this far without heat, we stay cool and attack the battery glue with some drops of magic. Wait just a tick—then, opening pick.

As smartphone batteries go, this one's a heavyweight—4,000 mAh at 3.82V, or 15.28 Wh.

That beats the Samsung Galaxy S9+ (13.48 Wh) and the iPhone X (10.35 Wh) by far and is on par with its kinsman the Mate 10 Pro. To be fair software has a big effect on power efficiency.