I actually kept my HP Touchpad charging bricks (cylinders?) because they always seemed really solid. They are still useful for all of my Pi stuff as well.
I'm still using mine to power a qi charger. Everything about the HP Touchpad was overbuilt, I got mine during the firesale.
I missed the firesale but my old employer didn’t. They tried using them as POS devices and that never happened. One day they were just like “Get rid of these”. I played with cyanogenmod until all the batteries swelled up and I got rid of them.
Memories! I have 3 of those long cylinders from my old TouchPad too, and a stubby one from the Veer. Solid 5V2A chargers, but boy do they stick out.