recharging several high demand devices at once

For several years now I have been searching for a mains to USB device to recharge at least three devices at once, namely:

Samsung tablet - 5V - 2.4 amps - 12 watts
Samsung keyboard - 5V - 1 amps - 4 watts
Nikon camera - 5V - 1.5 amps - 7.5 watts

Total needs @ 5V = 5A or 25W - plus an allowance for an impulse buy.

Most chargers do limit their total wattage to a lot less than this. Many specs for multi USB port devices hint they met the need, but did not do so in practice.

Another need was to use the device in NZ, EU and UK - this requires three different mains pin-outs. The two needs (at least 5 amps and at least 3 fully rated USB ports) could be met in three ways.

1) Buy a device with NZ mains pins. And purchase two converters: 1.1) NZ to EU mains pins and 1.2) NZ to UK mains pins. These converters tend to be quite heavy and the overall weight would be around 400 gram.

2) Buy a device with interchangeable mains pin faces. These faces tend to be lightweight and the overall weight between 250 and 350 grams.

3) Buy an all-in-one device - the various mains pins are pulled from one face of a cube shaped box. The ones I found had only two USB ports. While rated for 2.4A one port, the Samsung tablet did not recognise them for normal charge. Weight for these devices was typically under 200 grams.

As information was sketchy, I must have purchased about 10 devices over four years to trial. I have now discovered two devices that meet the needs. Following an abortive request for information on this site about 18 months ago, I am keen to share my findings. I do so with the usual declaration that I have no interest in this matter other than as a customer.

A.0 - Orico 4-port USB wall charger - model DSP 4U
A.1 - 4 USB ports 5V @ 2.4A max each port - max output 6.8A or 34W
A.2 - total weight, including interchangeable faces, 240 grams

B.0 - mbeat - Gorilla power 4 port 6.8A 34W USB world travel charger
B.1 - 2 USB ports 5V @ 1A max and 2 USB ports 5V @ 2.4A max
B.2 - total weight, including interchangeable faces, 290 grams

As the Orico is lighter and more compact in shape, and as I don't need to worry which port I connect the tablet to, this is the one for me to pack.

Kia kaha (take care, be strong, get moving)

@Sixwheeler from Bath. I applaud your community spirit.

But were any of the five devices Amp hungry, such as Samsung or Apple tablets?
Or were they standard fare 1 Amp phones?

The focus of the original post was how to satisfy the power hungry beasts.