I see. The mod battery doesn't fall off as fast as the 901 battery. That's probably the reason.
If all you need is the atty connector, I'd recommend that you go to Radio Shack and get the dc jack. Its only $3 and is stronger, more secure and easier to solder to than a 901 connector from a battery.
Jeez, I must be a .....! I have the AA battery box and the Ultrafire 14500 but it will not fit in the box. It comes close but it won't fit in without almost busting the plastic. Should I be taking the last spring off where the neg contact is on the batttery? That would probably make it fit but I didn't see where it said to.
I have a question. Would my 401 battery charger be compatible (after a slight modification) and or supply enough power to charge the protected 14500?
4.2v at 100ma. I can fit the charger from my 401 inside my nicostick and was thinking about taking off the usb cable end and adding a small female mini. Hence it could of been a rechargeable nicostick.