what you need to know first is find the two gens the blue and green than go put it in the place were you need them which then a door opens. when it opens go in it and walk straight then when you come across the blue door some zombies come out if this doen't happen then keep going straight then you come across two ways you can go to the left or to the right but you should go to the left go trough the door and kill the zombies then make your way to the other door and kill the other zombies or dogs after clim the boxes and you see the trailor go in and then a cinema would play. after doing this you'll go all that way to the entres of the city hall but when you pass the blue door some zombies would break the door down kill them all and go inside the door to the other side there you'll find the mayors statue and take the broze book and get out of there then go all the way back pass the save room and turn left go out that door too and once outside the door walk straight and you came across a fountain thing there you'll put the bronze book then go take the object in the left then you will not get electricuted then after that backtrack to were you find the mayors statue and put the object there then the statue will turn around and the battery would be reveal............hope you understand what i'm trying to say...............Good Luck!!!!!!!!!