Should I hack my wireless mouse recharging dock from AC adapter to USB power?

If you think about what you are doing, I think you will agree it is much better to recharge the mouse off the outlet then a laptop's battery. Assuming, because you want to swap out the wall wart for a USB plug, your are re-charging your mouse from your laptop's battery. If that's true... Well, there is no such thing as a perfect power supply/converter.

They all lose some energy to heat. And no matter how careful you are you will always lose energy as heat when recharging LION batteries. (The closer LIONs get to full charge the more the extra energy turns to heat.

That's actually how some LION chargers tell when they are done. ) What am I saying? If you top off the charge on your mouse from your laptop's battery, your laptop's battery will not only be lowered by the transfer of energy to the mouse but also by the all the heat the process generates.

Instead, if you topped off both batteries from an outlet, your laptop will last longer between charges and extend the laptop's battery's overall life. --- Other things to know about LION: They don't like high temperatures and they don't like to be stored at a 100% charge. If you are not going to use a LION cell for a long time, store them at a partial discharge (see link below).

--- Yo, I just back traced where your image came from. This mouse is suppose to go... "3 Weeks Between Charges" ...that's way longer than any laptop.

If so, and if you're willing to go inside the case; there's plenty of regulated power inside that case. Find an appropriate source, regulate it down to 5.4V and mount some sort of connector to the exterior of the case.

Quoting Wikipedia here, "Some devices like high-speed external disk drives may require more than 500 mA of current and therefore cannot be powered from one USB 2.0 port. Such devices usually come with Y-shaped cable that has two USB connectors to be inserted into a computer. With such a cable a device can draw power from two USB ports simultaneously."

It is unlikely that you will be able to successfully power the dock on one USB port, but looking into creating a two-port Y cable, and wiring them in parallel to split the drain between the two is an option. You won't have an issue with sourcing too much current, if you're worried about that. The voltage is *probably* okay, the best thing to do would be to try it.2 NiMH AAs supply 2.4V nominally, so it's not like you'll be having trouble overcoming the batteries' voltage.

Sorry I couldn't be more helpful, good luck!

The answer is definitively yes. NiMH as NiCd accumulators are recharged with a current 1/10th of their capacity in mA/h (at ideal case) and if necessary at least at their nominal voltage of 1.2V. That means, for actual AA cells - worst case aka top quality and capacity cells - say 2800mA/h, a charging current of 280mA is drawn lasting for 10 hours to have them completely charged.

Due to poor quality of the low cost oriental recharger circuit, we'll add 100mA to the theoretic charge current and have the cell recharged in a significant shorter time at the expense of the cell's life and the risk to have it explode. Yes, you're reading it right! Anyway, to answer you in facts.

The voltage and current you exposed are maximum ratings of the power supply. Any load connected to it lowers the voltage depending from the current it drains. The 5.46V are dropped by the charger's circuit from time to time to the necessary voltage to obtain the said recharging current of nominal 280mA (or chinese 380mA).

This means you can, no doubt, connect your docking station to the USB plug and you have, in the worst case, already more than 100mA free for other use. BTW I'm using the same mouse connected as you describe and it works fine.

Should be possible, worst case you could use a buck-boost converter to boost it to the 5.4V, which can usually be sampled for free from ti. Com - also I have drawn more them 500ma from most usb ports as I have a hdd that draws 650 and it works on one port, so I think 500ma is just a guideline not a rule.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.