Agree with other commenters. Remove the other end cap, remove 4 screws around charging port, remove first cable from charging port and kind of pull the charging port out of the body a little bit to give yourself some room to see the battery behind (be careful because there are two more cables connected). Apply a few drops of oil around the battery and wiggle the battery back and forth a few times. Use the eraser end of a pencil (nothing sharp like a screwdriver, if you pierce the battery it may catch on fire) to push the battery out from the back side, being careful to avoid the ribbon cables. You may have to push pretty hard. Use a paper towel to clean up the oil before installing the new battery.