Erm, I myself won't recommend anything higher than the specifications provided by manufacturer, yes it will charge your mice quicker but it may also shorten the battery life quicker as well.
If you want to be sure, you can check the label at both the Razer and Samsung adapter, Power input rating: 5V 2.1A for example belong to Samsung flagship phone's adapter due to their increase in size of their battery pack thus require higher current to charge faster, normal devices usually sticks with 0.5A (PC USB2.0 current), 0.9A (USB3 current) or 1.0A (most devices current).
Anything higher may also damage the IC components inside the docking or even the mice itself, cause the docking of the mice may be using a lower current rating components (to save cost ).

Well, the effect the over-current charging is not that great for Nickel, however Li-ion will have much noticeable if it's used (over-current) every time.
http://batteryuniversity.com/learn/article...based_batteries
Each batteries technology has its own pro and con, perhaps which is why some product uses Nickel instead of the much common Li-ion.
Conclusion, if the battery is replace-able, and one does not care much about the charge cycle, why not? Just charge it anyway, dead just buy new one...

The basic and most important part in Sales & Marketing.
That what's making Razer so successful, don't you all think so?
p/s: Anyway I didn't watch those videos, but I can guess what's the concept behind them.

It doesn't convert, it just dampen the bottom-up sound, that's where the keycap hit the plate or the keycap hit the switches.
The switches clicky sound (MX Blue/Green) still present but only the clicky sound is much sharper (noticeable?) due to the dampening of keycap hitting the plate/switch sound.

This post has been edited by wildwestgoh: May 5 2014, 07:39 AM