Unique Toys G-02DX Mania King Vintage Color Version

Hello
,
I have a UT G02DX Mania King, the laser light is no power now
. I unscrew the screw, I attach a photo to you. The yellow part is the battery pack. But how to use the new battery bundled together? I think I need to open the yellow part first. do I need to use that yellow paper make them bundled? or use other something? And the Aluminum Sheet is fixed with battery, if I open it, how to fix together again when make new battery bundled together? Any friends try to change the new battery? Can you tell me more detail ?
Thanks

I have a UT G02DX Mania King, the laser light is no power now


Thanks
