NP-FW50 5V USB battery charger DC Coupler AC Power Supply Adapter AC-PW20 for Sony a7 a33 a37 a3000 a5000 a5000 A5100 a6000 RX10 RX10 II III SLT-A37M Camera Only suitable for (16 ~ 50mm) lens

This does not work as advertised. Whether using a 5V/2A (or greater) USB battery or a wall charger capable of the same output, after a few minutes, the camera shows "Battery exhausted" and shuts down. I've tried it with several USB batteries, all of which should be able to provide enough output as per the listing here and label on this device.

Power on camera is slower more than using battery

Works as advertised. Received in a timely manner and would purchase this again. Nice doing business with for sure. Great product.