There is a light indicator on the left hand side of Mamba2012.
During you plug the cable or put on dock for charging, if the single LED blinking, then the mouse battery is not charging.
So, you need to undock/remove cable and remove the battery and put it back.
If it's charging, the LED will move from bottom to the top. There is 3LEDs indicator.

If your mouse behave like normal, no such problem, please proceed to RMA this mouse.
Since, probably you get a defective battery/mouse.

P.S. : I'm using mamba2012 for more than a year.. Just from experience.
Those double-click can be easily fixed by replace the mouse switches or you RMA it.
Just don't complain only this brand got such keypad, you buy yet you complain.

See the picture, if fully charged, the LED will have 3 bars. The 3LEDs will just stay there without moving.

It takes very long time for fully charged. By cables, took lesser time compared to dock.
Above 5 hours in my current situation, and the battery life is shorter compared to last time.

Blinking wheel is not a choice to select in synapse...
The blinking wheel may indicate charging, but you still need to see the LED on the left side to confirm it.
Last time, I thought I did charge because I saw it blinking wheel without seeing the LED on left, so I left it overnight. During morning, actually still no battery.

Honestly, this mouse mamba 2012 do have some bugs regarding the charging.
Most of the time, you unplug the cable and battery and put it back will solve it.

Since the battery life become shorter, now I plugged in the cable to mouse and use it.
Still it's a good mouse even in wired version.

Ya, charging from the Razer cable itself is the fastest.

Your samsung plug able to fit the mamba2012?

I tested with other similar usb like above picture (ps3 usb, other usb) are not able to fit the mamba2012 because the plastic housing of the usb is big.
You can try yours and see whether can plug in or not.
So, I just use the dedicated cable of mamba2012 since other cables not able to fit.

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 ).

just wondering, if ur desktop to b shut down how the USB port goin to get electricity?

Okay , bought a razer mamba and that mouse keep making my mbp to crash , anyone had experience on it ?
Currently using blackwidow + deathadder(MLG version) and nothing goes wrong , just that Razer Mamba causing it .

Razer Mamba user here. Been using it for a good long time already. My sidegrips however, are starting to fall apart.    Unsurprisingly there is no replacement part for this. Probably have to find some kind of adhesive to stick it too (tried double-sided sticker) but it just pops out the grip even more. Any other ideas? I was thinking super-glue...   

Kinda sucks that the mouse is fairly steep in price yet something as simple as sidegrips can fall apart. For sure wear and tear, but I am not much of a 'mouse gamer' but a game controller person.

Hello. Can I have opinions on Razer Adaro in ear headphone? Thinking of buying it but considering the price heard that I can get way better than this. Please,noob here.

Just 1 LED or what?