BATTERY REPLACEMENT INSTRUCTIONS
Replace the Battery
1. Disconnect power to opener.
2. Using a Phillips head screwdriver, remove the battery
cover on the motor unit.
3. Remove old battery and discard.
4. Partially insert new battery into motor unit with
terminals facing out.
5. Connect red (+) and black (-) wires from motor unit to
corresponding terminals on battery.
6. Replace battery cover.
7. Reconnect power.
To reduce the risk of FIRE or INJURY to persons:
• Disconnect ALL electric and battery power BEFORE
performing ANY service or maintenance.
• Use ONLY Chamberlain part # 4228 and 41A6357-1 for
replacement battery.
• Do NOT dispose of battery in fire. Battery may explode.
Check with local codes for disposal instructions.
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