ok went to my local game store today for a 2nd wireless pad and thought i best buy a Battery Pack also so picked up one of these http://www.game.co.uk/Xbox360/Hardware/Acc...attery-Pack/?s=

1st thing i noticed was how tight the battery was i know some can be tight at 1st even the ms ones but the amount of stress this thing puts on the controler is stupid it doesnt even line up with the pad right! anyway after just 10mins of use the battery poped out on my floor and when i looked down to my horror saw broken plasic from control the clip that holds the battery inplace had snaped off the pad with the stress

GAME told me its like buying a cheap pair of trainers they wont fit aswell as nike.. funny how they talk about a product they make so i said yh but they wont snap ur feet off

ive fixed the pads clip with some supper glue now all working with a real microsoft battery

i bought some nyko ones a while back, and they were a bit to big also. not only were they intermitently working but i started to get hairline fractures in the same spot as you on the controller. they went in the trash. now i just use the MS ones.