Made from this dirt cheap "pill shaped keychain"
DealExtreme: $2.61 Aluminium Alloy Pill Shaped Keychain
Uses one protected 18500 3.7v 1600 mAh batt.
No wires or solder. Basicly two springs and a plunger/button with atty connector.
Pic posting attempt. The pill thing before and after and a 510 in there for scale.
Somewhat exploded view of parts (next pic). I apologise for crappy cellphone pics.
Bottom row from left to right.
1: Battery (atty) connector with bottom shell part cut off so as to make contact with the positive button on the batt.
2: Positive end spring with a bit of foam around it to center it (could not find the right spring locally).
3: Negative end spring bent more conical to miss washer on next item.
4: On off button/plunger made from the cut off part where the keychain attaches to (don't waste anything!).Tapped with a #6-32 1/2" long bolt,washer and nut attached to stop it from falling out and adjustment.
Next pic is a feeble attempt at a close up of the button and batt/atty connector.
I did this with a cordless drill, a dremel and a tap ($4). So anyone can do it, it's almost free and it's shiny.
My first battery mod so cut me some slack.
More info if anyone cares.
DealExtreme: $2.61 Aluminium Alloy Pill Shaped Keychain
Uses one protected 18500 3.7v 1600 mAh batt.
No wires or solder. Basicly two springs and a plunger/button with atty connector.
Pic posting attempt. The pill thing before and after and a 510 in there for scale.
Somewhat exploded view of parts (next pic). I apologise for crappy cellphone pics.
Bottom row from left to right.
1: Battery (atty) connector with bottom shell part cut off so as to make contact with the positive button on the batt.
2: Positive end spring with a bit of foam around it to center it (could not find the right spring locally).
3: Negative end spring bent more conical to miss washer on next item.
4: On off button/plunger made from the cut off part where the keychain attaches to (don't waste anything!).Tapped with a #6-32 1/2" long bolt,washer and nut attached to stop it from falling out and adjustment.
Next pic is a feeble attempt at a close up of the button and batt/atty connector.
I did this with a cordless drill, a dremel and a tap ($4). So anyone can do it, it's almost free and it's shiny.
My first battery mod so cut me some slack.
More info if anyone cares.