NP-FW50 Replacement Battery 2 Pack and Charger for Sony A6000, A6500, A6300, A6400, A7, A7II, A7RII, A7SII, A7S, A7S2, A7R, A7R2, A55, A5100, RX10

SKU: KF28.0004

A
No it doesn't, it seems like none of the batteries have a date code 
A
Micro and Type-C are input ports, they charge the battery. USB-A is the output port, which discharges the battery. 
A
I guess that means they are safe to use the camera. 
A
You can charge one or two batteries 
A
You can charge 1 battery individually or 2 batteries at once if desired. 
A
I've tried both, and it's pretty fast either way. 
A
Compatible, it uses the included USB Type A to USB Type C cable, so you can plug it into a travel adapter with a USB port. 
A
I can't give you an exact time to charge the battery - too many variables, how discharged the battery is, how old the battery is, etc. But I can tell you that what you plug in makes a huge difference. I use a small adapter that plugs into a 110V outlet instead of using a computer's USB port, and in particular a 5V 2A fast charger for my phone works best.