idea from don chua.. he has got a working one..
i'm doing some enhancements to mine.. ermz.. i mean i WILL be doing some to mine..
see if can allow for 5 AND 6 battery configurations.
1.7mm plug, go sim lim tower.. i walk all the shops, only got 2 shops sell.. ermz.. but i forgot the names, only know which ones.. 3rd floor n basement.
Forgot the polarity.. hmmmm i think (i forgot, must open up see again) the inside shorter part is positive, outside is negative. can always ask the shop pple.. NOTE: Soldering the plug is not easy. involves a bit of skill + relatively steady hands.
Alternatively. I think it's possible if you find one of the old sony discman chargers and cut the wire and use it. saves you the trouble of soldering, but the wire's pretty ugly.
and the plug is bent (L shape) not straight.
*edit*
sony plugs have got this yellow tip. you can't miss it. there's 2 type though.. 1 small and 1 big.
fitting the small one in will feel like it's the 1st time, every time you push it in. the big one will fit just nice. (small one got 3 shops selling $0.70 - $1, but i prefer the big one) It's your personal preference. Me, I like mine to be big.