Extended Durex Play (Vibrating Ring)

I got one of these little vibrating ring doodads and can concur with these reviews that's it's bloody great. There are two problems though. First of all it's €10+ in the Rip-off of Ireland. Compare that with $22 for 6 in the US! And the second is that it's intended to be disposable (20mins of use). The second problem wouldn't be a problem if they were on sale for an American style €2.40 each.

So being the gadgety skinflint that I am, what follows is how to disassemble it and replace the batteries with more powerful ones...

1. Wash it :-)
2. Pop the device out by squeezing it through the switch hole,
   
3. I took a very sharp unserrated steak knife and sliced into one end,
   
4. Then I took a a thicker, sturdier knife and widened the gap,
   
5. I flipped back to the skinny knife and extended the gap gutting it like a fish,
   
6. The skinny knife still in there I brought in the second knife and opened them like scissors popping the device open,
   
   I'd say the device is lightly glued together so there weren't little catches I could pop next time.
7. So here it is: two little batteries, a motor with a semi-circle of metal, and a switch. Who would've thought?
   
8. The battery says G3-A which turns out to be, according to this chart an LR41 aka 192, a 1.5V alkaline button cell. My geeky teenage years and stint working at Maplin put to good use: that battery is the same as a SR41 silver oxide and the SR41 is both higher capacity and higher voltage: more vibrations, and longer!
   
9. Re-assemble. Because the device is sheathed in rubber I'm not worried about insulating it.

Enjoy :-)