Step 1: Turn on your computer.
Step 2: Plug in your EFA-Linker.
Step 3: Sleep for 8 hours.
Step 4: Play games with EFA-Linker.
Step 5: Save.
Step 6: Find some activity to take up 8 hours.
Step 7: If the save is still there, then the battery just needed to be charged, so it's fixed now.
Step 9...