The Connect Four Electronic Handheld device uses one AA battery. In order to replace this battery, Unscrew the battery panel located on the back casing using a phillips head screwdriver. Replace the battery and reattach the battery panel.
For further questions regarding the device, consult the Connect Four Electronic Handheld troubleshooting page: [[Connect Four Electronic Handheld Troubleshooting|Connect Four Electronic Handheld Troubleshooting]]