If you have a garage door operator with a battery back-up feature, the battery will need to be replaced periodically. This battery is a 12 volt (4.5AH) and is compatible with LiftMaster models 3840, 3850, 8360, and 8550. Also may be used with most Craftsman and Chamberlain models.
*This item is available for local pick-up, or local delivery only. Shipping is not available.