What's the charging voltage for an Mx Revolution Mouse?
December 15, 2010 7:42 PM Subscribe
I've lost the charging dock and AC adapter for the Logitech MX Revolution mouse. There's no way to charge this mouse without the dock. I think I can pretty easily build a new dock on my own, I'm just looking for owners of this mouse to answer a technical question to help with construction.
posted by anonymous to Technology (9 answers total)
First off I'm posting this anonymously because it's meant as an xmas gift for another Metafilter member, and if they see that I've posted an AskMefi about it, it'll ruin the surprise.
What I need to determine is the correct volatage/amperage to send into the two contacts on the bottom of the mouse. Here's where I'm confused:
On the bottom of the mouse the power rating is 4.1V/800mA.
I know that the (non-removeable) internal battery is 3.7V.
Pretty much every 3.7V battery uses 4.2V to charge, so the 4.1V/800mA rating makes sense.
But the AC adapter for the dock is rated at 8V/500mA.
So somewhere the power is being converted from 8V/500mA to 4.1V/800mA. I need to know if this is happening inside the dock, or inside the mouse.
If it's happening in the dock I need a 4.1V AC Adapter, if it's happening in the mouse I need an 8V AC Adapter.
Essentially I need to know if there's anything inside the dock more complicated than two wires running from the AC input, to the two pins that contact the mouse.
I'm also aware I can find replacement dock/AC units on ebay, but the $30+ that will cost compared to $5-10 in materials just isn't worth it.
Thanks for any help you can provide!