Can we use a different battery in the iNew v3?

[elransa84]

Hi all... just got my thl w8 battery. well, i sanded its arse off and the smell is still in my fingers. it fits.
but- i managed to tear the contactsfrom its places in 2/3 pins and so it didnt work at first.
then i thought to myself- im such a smartass why not put tin foil as contacts. (for surface contact replacement) and so it works. i have a feeling its not the best thing to do. what should i do to replace the contacts? any ideas?
also its been an hour 40 and im still onthe same initial 60% it had when i booted wih the battery.
ps
1.0.7 is better power management i had a full day and half of standby and had 30 % more w 2 hrs screen included some gps and some data and call.

so either way im pretty pleased if i stay with the original battery now. though bigger is defo better.
cheers!