Okay, so you first want to grab the battery in the cart first, then grab the battery in the locker. Keep in mind that you can only carry one at once. As soon as you grab the grabpack, shoot your hand straight at the panel-you should have to get it first try. Run towards the door, and complete the puzzle. Once the door's open, head straight to the area with the slides and tables- should be the Day Care. there should be around 2-3 fuses there, which is exactly what you need to open the door. If you have 2, there should be one on your way there- the mommy long legs statue. Open up the gate.