Hi Isaac,

To answer your question.....

Yes, a little of both!

I did remove one of the batteries (as it uses 2 AA cells in parallel and=20
it feels noticeably heavier than I'd prefer with both batteries in place).

The battery life is part of the issue, but the pressure of needing to=20
remember to turn it off and on every time I start or shut down my=20
computer is the root cause of my efforts to reduce the battery power.=20
It's inconvenient as HELL and I keep forgetting.

If I could figure out how to significantly reduce the power consumption,=20
I'd gladly give the info to Logitech. I'm sure I could reduce the power=20
consumption significantly, but I'd rather not hack a solution.

It appears to me that Logitechs approach to reduce power consumption=20
makes the mouse sluggish because they slow down the the scanning rate. I=20
think they should reduce the scanning rate from 1000 frames per second=20
to 100 frames per second when the mouse isn't moving. BUT, that they=20
should only scan a single data point, which they can do by pulsing the=20
laser and reading only one pixel from the photodiode array at 100 hz.=20
This would require them to pulse the laser, but since they design their=20
own mouse chips, it seems like a no brainer to me.

I think that a minimum of a 500X reduction in battery power is=20
achievable without any noticeable lag or sluggish response that the=20
mouse currently suffers from. And, all the current power management=20
firmware and battery saving measures they currently use wouldn't be=20
needed at all.

If they changed to a VCSEL laser, they could reduce power by another=20
factor of 2 or 3X.

If the user was willing to use a mirrored mousepad with a random=20
greyscale pattern printed on it, it's possible that another 3X power=20
reduction could be made.

Wouldn't it be great to run that puppy on a watch battery instead of AA=20
cells? Or, maybe just to run it for 10 years on a single AAA cell? They=20
could call it the FOREVER MOUSE:)

Anyway, I can't do all the stuff that needs to be done to make the power=20
consumption really low, I just don't have enough knowledge of their=20
hardware and firmware to do the job correctly. But, I'd like to make it=20
low enough so that the power switch can just be left on forever or=20
replaced with a zero ohm resistor:)

AG



  On 10/01/2015 06:57 PM, Isaac Marino Bavaresco wrote:
> Is the OP trying to overcome a real problem (that is, his mouse's
> battery doesn't last a reasonable length of time) or is he trying to
> improve it just as proof of concept?

--=20
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