Here is a USB charger that can charge up to 100 devices with 1A or 50 devices with 2A, so you can use it to charge all your tablets and smartphones at the same time. This 100-port USB Charger comes with overvoltage, overcurrent, leakage, and short-circuit protection.
This charging station has an aluminum shell for better heat dissipation. You can get one of these for under $260 at this time.[where to find it]