Craftsman Garage door opener Battery

Replacing your Garage Door Battery

01 _BS21136

By Bruce W. Smith

Garage doors with backup batteries are a common site in homes across the country where storms bring frequent power outages.

But the backup battery doesn’t live forever, despite the built-in battery charging systems found in many of the better systems. Long periods without power, or frequent periods of using the standby battery pack before power is restored, eventually takes a toll.

Fortunately, there’s an easy solution: Replace the batteries inside the backup pack. The fix takes less than 20 minutes and costs less than $30.

The batteries in my Sears Diehard garage door opener backup battery system is the same as those found in thousands of others—a pair of 12V / 5Ah units that are common in home security systems’ backup batteries.

I found the replacement batteries at for $30/pair with free shipping—or about 1/3 the price of Sears replacement batteries. (The same battery fits a host of other brand’s garage door backup systems, including Liftmaster and Chamberlain.)

02_BS21141Replacement requires nothing more than removing the four screws that hold the top of the backup battery pack in place, disconnecting each battery’s wire from the circuit board, crimping on spade connectors to the new batteries’ leads, and dropping them in place of the old batteries.

Now if the power goes out, push the garage door control and … open sesame.

This Sears Diehard garage door opener battery backup lasted for 8 years before the internal batteries died.

The plastic top is held in place by four self-threading screws that are easily removed.

The backup battery system consists of two 5Ah rechargeable batteries (Sears #41B822) that plug into the smart circuitry. To remove, unplug the connecting wires from the circuit board.

This UB1250 battery (eCom #4228) is the direct replacement for the Sears 41B822. Street price is about $15.

New batteries come with universal 18-ga. spade terminals. So the wires have to be cut from the old batteries and fitted with spade connectors.

Reinstall the new batteries and plug the connector wires back into the control board.


New batteries are in place. You may have to bend the terminal at the “top” of each battery so it clears the edges. (Original battery wires were built into the battery itself.)

Replace the top. In some instances a little minor trimming on the underside of the top is needed to clear the upper spade terminal on each battery.

View Related

  • By Larry Walton Photos by Mark Walton It may look like home improvement skills come naturally for my brothers and me, but it’s mostly due to a lifetime of lessons strung together. Early on we learned from our dad, a professional carpenter and a prolific remodeler of the house we grew up in. […]
  • Here’s Phase II of a basement Renovation—The Finish Line By Mark Clement
  • By Tom Matthews
  • Lessons from Math Teachers’ Past By Clint Thomas, Photos by Zoe Thomas

Free Newsletter Signup

Enter e-mail address to subscribe and get latest updates and info.

Bonus Sweepstakes

Three winners will be chosen to receive the following prize packages, each will include: 1. Red Angel AC Stop Leak & Conditioner Repairs leak points in condensers, evaporators, connection hoses, gaskets, and o-rings Contains no solid or particulate matter that will clog the A/C system or harm the recovery unit Contains 2.5 ounces of Freon Easy to use, intended for […]

10_BS21161 11_BS21166 Lead MyFixitUpLife_Basement_Remodeling_7508
Mighty Max Battery ML5-12 - 12V 5AH Battery for Craftsman Garage door opener model 53918 - Mighty Max Battery brand product
CE (Mighty Max Battery)
  • ML5-12 SLA is a 12V 5AH Sealed Lead Acid (SLA) rechargeable maintenance free battery
  • Dimensions: 3.54 inches x 2.76 inches x 4.21 inches. Terminal: F1. Listing is for the Battery only. No wire harness or mounting accessories included.
  • SLA / AGM spill proof battery has a characteristic of high discharge rate, wide operating temperatures, long service life and deep discharge recover.
  • Rechargeable battery that can be mounted in any position, resists shocks and vibration. Long lasting high performance in high and low temperatures
  • Backed by a 30 day refund policy and full 1 year warranty
You might also like:
Craftsman garage door opener
Craftsman garage door opener
Craftsman Battery Backup Side Mount garage door opener
Craftsman Battery Backup Side Mount garage door opener ...
BatteryJack inc. 12V 5AH Battery for Craftsman Garage door opener model 53918 3 Year Warranty
CE (BatteryJack inc.)
  • PowerStar® Brand Batteries
  • Sealed AGM design makes batteries leak free
  • Stable Quality & High Reliability
  • 12 volt 5 ah battery - 12v 5ah battery - 12 v 5 amp battery
Chamberlain Chamberlain 4228 Replacement Battery for Garage Access Systems
Home Improvement (Chamberlain)
  • Operates the garage door opener as if the power was still on (all safety and security features still operate)
  • For use with all Chamberlain Garage Door Openers with a Battery Backup System
  • 12 Volt
  • 5 Ah for use in Emergency Lighting
Craftsman Craftsman 3/4 HP DC Belt Drive Garage Door Opener with DieHard Battery Back-Up
Home Improvement (Craftsman)
  • General Warranty:10 years motor, 90 day parts/labor
  • Horsepower:3/4 hp
  • Safety Sensor Type:Non-contact
  • Wall Control Type:Motion detecting wall control
  • Battery Backup Function:Yes
Related Posts