Let's make unlimited times and quickly chargeable Supercapacitor battery for mouse.
What we need:
- Supercapacitor (I use 5.5v 1F but bigger is better)
- Wires & stuff
- Voltage regulator (In my case 1.5v 1A because my mouse work on one AAA battery)
- Power supply 5.5v (I use this adjustable from ebay)
Step 1: Schematic. Difference Between Capacitor and Battery
As You can see in diagram ordinary battery don't have so big voltage drop during discharging as capacitor have. Because of that 5.5v ultracapacitor will work until it drops from 5.5v to about 1.5v so voltage limiter will supply to mouse about 1.1 volt.
Step 2: Build & Charge & Go...
Step 3: After Word
At the end it turn out that it of course is not keeping charge as long as ordinary battery. Also Capacitor have quite quick self discharge.
May be in near future I will add some resistor for limiting current going to mouse. Probably adding diodes between charger<->capacitor and capacitor<->voltage regulator would be nice idea as well.
P.S. Mouse warranty is voided.