For the first time, the Black Shark 3 Pro uses an integrated physical-mechanical button. We expect to see similar features with the upcoming Black Shark 4. The battery size on both devices measures in at 4,500mAh and comes with frankly insane 120W fast charging support out of the box. To put that into context, you can charge the Black Shark 4 in under 15 minutes. Overnight charging is simply no longer necessary to get a day of gaming out of…