A:AnswerNo.
It inputs 120v AC (mains power), and outputs 120v AC (max 10A) via one (normal, mains) receptacle, and via 2 USB-A receptacles (running at 5v DC) a combined max of 2.4A.
HTH!
A:AnswerNo, it's not waterproof.
The only weather resistant power banks I know of just have protective covers over the ports. The ports still cannot be wet on those units.
A:Answer5 x's 2.4 = 12 watts / 2 ports = 6 watts per outlet. Times probably about a 65% efficiency factor = about 3.9 watts per outlet if the manufacturer isn't telling any fibs.
Retired EE.
Yes chargers are rated in watts.