So if you were wondering what's inside a DX 5mW 3xLR44 green laserpointer, wonder no more. This thing draws about 220mA on fresh LR44s (AG13). That kills the batteries in no time.
I opened it by:
1. first unscrewing the rounded top end.
2. I used a small metal rod in my drill press to push the module out from the battery side. I used the drilled/spilt piece of wood to support the tube shoulders when I pressed it out.
3. There was no glue.
The re-assembled pointer
PCB pot side (yes, the pot does work!)
PCB Switch side
The focusing barrel was very loose (which may account for the intermittant output problem for some)
Side view of the crystal
Top View of the crystal
I have a couple of 10180 Li-ion cells coming that I hope will provide better run-time.
The 10180s have arrived! It fits OK and works well. Current was 290mA for a cell at 3.8V and 4.17V (open circuit voltages).
I opened it by:
1. first unscrewing the rounded top end.
2. I used a small metal rod in my drill press to push the module out from the battery side. I used the drilled/spilt piece of wood to support the tube shoulders when I pressed it out.
3. There was no glue.
The re-assembled pointer
PCB pot side (yes, the pot does work!)
PCB Switch side
The focusing barrel was very loose (which may account for the intermittant output problem for some)
Side view of the crystal
Top View of the crystal
I have a couple of 10180 Li-ion cells coming that I hope will provide better run-time.
The 10180s have arrived! It fits OK and works well. Current was 290mA for a cell at 3.8V and 4.17V (open circuit voltages).