*Housing is not available, must reuse existing. You will receive batteries only. 

This is a Battery Backup Replacement Kit. For use with various LiftMaster® and Chamberlain Garage Door Openers; featuring a battery backup system (BBU). Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility.

• Compatible with Chamberlain garage door opener models: HD800D, WD952KD and WD952LD
• Compatible with LiftMaster garage door opener models: 2500, 3500, 3800, 3800P, 3800PLD and 8500
• Replacement battery for LiftMaster 475LM Evercharge battery back-up system
• Includes: two 12v, 4.5AH rechargeable batteries
• Will operate garage door opener for up to two days of normal use during power outage.
• Usually ships the same day!

⚠WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov