There are a total of 67 Batteries to collect. There are none in Level 1 so you won't have to worry about these until you reach Level 2. You'll find most of them as you complete challenges and kill the Spiders required to progress forward but if you need any help, their locations are all listed below. In Level 9, there is an upgrade you can pick up that will show these on your Arachno-Scanner. When you're close to a battery, the box with the "?" inside of it will blink, letting you know it's close by. You can replay any level via the chapter select menu should you miss any. Once you pick one up, you'll have it forever and it'll disappear from any future playthroughs of any level you do. Once you've collected all 67, the trophy will unlock.
Level 2 - Close Encounters (7)
- Inside the bedroom, in the middle drawer of the nightstand closest to the door. It has a picture frame on top of it.
- Inside the top right drawer of the dresser in the boy’s room. This room unlocks when you’ve killed 10 Spiders.
- When you gain access to the Study - on the floor on the left side of the desk are two batteries.
- See above.
- When you gain access to the Study - In the trash can/bin on the right side of the desk.
- In the Study - Underneath the yellow pillow on the green chair, just next to the door.
- Inside the Secret Room in the Study (pull the blue and yellow book). On the bottom shelf, just next to the Tracker Upgrade.
Level 3 - Domestic Duties (8)
- In the bottom right drawer of the sideboard (dresser).
- In the bottom cupboard to the right of the stove is a large soup pot. Inside the pot is the battery. Careful when taking it out as the battery has a tendency to go flying. If it does, you need to go find where it landed.
- On the chair at the end of the table, by the pizza.
- Inside the Microwave.
- Inside the laundry room (6 Kills), on the floor to the right of the dryer.
- Inside the laundry room, inside the washer. You need to jump to be able to see it.
- Inside the toolbox sitting on the workbench, below where you need to place the tools on the wall, are two batteries. One of the screwdrivers you need to place on the wall is in the Toolbox as well.
- See above.
Level 4 - Major Inconvenience (9)
- Inside the trash bin just to the right of the front door to the store.
- Behind the counter in the store, it’s on the bottom shelf inside the white cupboard on the right.
- Out in the back, inside the left dumpster (you need to jump to be able to see it)
- On the far side of the lot back behind the store is a wire spool with a garbage bag behind it. On the ground next to the garbage bag is the battery.
- Out in the back, underneath the front tire on the far side of the truck.
- Out in the back, kill 10 Spiders to unlock the red container. Go through the container and on the other side is a tent. Inside the tent is the battery.
- Out in the front, behind the leftmost port-o-potty.
- Out in the front of the store, if you’re facing the gas pumps from the front door, there is a drain on the left side with a battery inside of it (it’s right before the ambulance).
- Just by the ambulance in front of the Gas Station. It’s sitting on the wheelchair.
Level 5 - Garden of Evil (8)
- At the very start, there will be a lantern-like object on the ground on the right. Behind this is the battery.
- In the first area, there are 3 braziers you need to light up to complete a challenge. Behind the one closest to the starting point are two batteries.
- See above.
- Behind the second challenge flag (just after you pick up the Trimmer), on the ground is the battery.
- In the area with the 3 large Bonsai trees, on the ground behind the first one on the right.
- Just before you reach the second door, you’ll pass another small lantern-like object on the right. The battery is behind it.
- On the ground behind a rock, just to the left of the 3rd Challenge flag.
- In the final area, go up the stairs towards the shrine and around to the back of it. On a railing will be the battery.
Level 6 - Barnstormer (9)
- Underneath some grain bags in the small huts.
- To the left of the Greenhouse, on the ground between two hay bales
- On the ground just to the right of the entrance to the greenhouse
- In the back left of the Greenhouse, on the ground, behind where the Pumpkins are
- Inside the Garage, on a low shelf on the left side of the table. It’s inside a tray.
- On the other side of the white picket fence, when you first go enter the narrow path, there is a table on the left with a bunch of flower pots on it. Behind one of the big pots underneath the table is the battery.
- In the area to the right of the Garage, underneath all the hay bales in the back.
- Inside the left port-a-potty, behind the toilet lid.
- Inside the barn. It’s behind the hay bales on the right wall, down towards the exit.
Level 7 - Paper Trail (8)
- Inside the top left drawer of the desk in the room you start in
- In the room you start in, on the table in the corner between the white couch and the white chair.
- When you enter the second area with the cubicles (requires 2 Spider kills), immediately turn right and on one of the shelves, behind a stack of papers, is the battery
- In the 4th cubicle on the left (just past the printer), it’s on the desk by the window (move the monitor out of the way).
- In the office you unlock by killing 5 Spiders (the server room), this battery is on a shelf between a picture and a plant.
- Inside the Microwave in the Break Room.
- In the Men’s Bathroom in the leftmost urinal.
- In the office with the radioactive Spiders and Zombie Spiders. It’s next to the laptop on the table.
Level 8 - Contingency Omega (9)
- In the top left drawer of the desk in the room you start in
- When you go through the first door (it requires 1 Spider kill), you’ll be in a bathroom. The battery is in the trash bin.
- In the long corridor after opening up the secret room, it’s on the ground on the far side of the small fridge on the left.
- When you reach the large room with the control panel in the middle, look on the ground behind the console. It’s just next to a large yellow wire.
- Through the room that requires 8 Spider kills to open, you’ll find yourself locked out of an armory cage. The key to unlock it is inside the orange case just outside the door. When you can, go inside the cage and there will be 3 batteries on the table in front of you.
- See above.
- See above #5.
- In the room with the orange key, there is a desk immediately to the right of the entrance. Underneath the left monitor is the battery.
- In the room with the red key (10 Spider kills), just below the table it’s sitting on.
Level 9 - Consequences (9)
- In your partner’s old office, there are 2 batteries on the table.
- See above
- On the floor just outside of your partner’s old office (easier to see as you're leaving the office).
- At the top of the stairs (before you go down them), in the bottom drawer of the small dresser stand.
- When you get outside, there are two batteries on the sidewalk on the far side of the “Kill It With Fire Pest Control, Inc” van
- See above
- When you're outside, it’s on the table in the middle, next to the red button
- When you're outside, immediately turn left and there will be a white door blocked by a pallet. Remove the pallet and open the door. Inside, on a shelf to the left, are two batteries
- See above.