Battery for a Chamberlain Garage Door Opener
The Chamberlain 4228 is a 12V, 4.5 Ah rechargeable backup battery for Chamberlain garage door openers that have a battery backup system. It keeps the opener working during a power outage, and you can swap it with a Phillips screwdriver.
This page contains affiliate links. We may earn a commission if you buy through them, at no extra cost to you.
Will This Battery Work in Your Opener?
The 4228 is a replacement battery for Chamberlain systems that already have a battery backup. It does not add backup power to an opener that lacks it. Run this quick check before you buy.
Matching brand or voltage alone does not confirm a fit. Chamberlain’s replacement instructions say to use only its designated parts, 4228 and 41A6357-1. Always check the parts list for your exact opener model.
Chamberlain 4228 Specifications
| Property | Detail |
|---|---|
| Brand / model | Chamberlain 4228 (also listed as G4228) |
| Type | Replacement backup battery for garage door openers |
| Chemistry | Rechargeable, lead-acid |
| Nominal voltage | 12 V |
| Nominal capacity | 4.5 Ah (per Chamberlain support) |
| Standby time | Up to 24 hours when fully charged, at room temperature |
| Backup cycles | Up to 20 full open-and-close cycles in that period |
| Charging | Charges from the opener on mains power; about 24 hours for a full charge |
| Connections | Red lead to positive (+), black lead to negative (−) |
| Expected service life | About 1–2 years with normal use (Chamberlain support FAQ) |
| Warranty | 1 year from purchase (Chamberlain support) |
| Older part numbers | 041A6357-1 (discontinued); labels 132B2511, -1, -2, -3 |
| Tool needed | Phillips screwdriver |
| Pack contents | 1 battery |
Backup time and cycle count are Chamberlain figures for a fully charged battery in a compatible opener. They change with the opener model, door balance, temperature and battery age. Some retail listings show 5 Ah; this page uses Chamberlain’s 4.5 Ah figure. Dimensions, weight and terminal type are not shown because listings disagree and no official figure was confirmed.
Chamberlain Battery Replacement Difficulty
Most owners will find this an easy job. The hands-on work is a screwdriver and two wire leads. The harder parts are confirming the right battery and reaching the compartment on a ceiling-mounted opener. Tap a slice to highlight it.
- 25% Reaching the compartment
- 20% Connecting the leads
- 35% Choosing the correct battery
- 20% Charging & testing
Difficulty score and effort split are an editorial estimate based on Chamberlain’s replacement procedure, not an official rating. Full charging takes about 24 hours, but that is waiting time, not hands-on work.
How to Replace Your Opener Battery
Tap each step to tick it off as you go. You need a Phillips screwdriver, protective gloves and eye protection.
- 1Disconnect powerDisconnect mains power to the opener. Put on gloves and eye protection.
- 2Remove the battery coverUse a Phillips screwdriver to take off the battery cover on the motor unit. On some models you open the light lens first, so follow your manual.
- 3Disconnect the old batteryDisconnect the leads, lift out the old battery and set it aside for recycling.
- 4Insert the new 4228Partially insert the new battery with its terminals facing outward.
- 5Connect the leadsAttach the red lead to the positive (+) terminal and the black lead to the negative (−) terminal. Keep the wires in their channel and check the cover does not pinch them.
- 6Refit the cover and restore powerPut the cover back on and reconnect mains power. The battery light flashes green while charging. A full charge takes about 24 hours.
Once the green light flashes, unplug the opener and run the door with your remote or wall control. Plug it back in and check the battery light shows charging. Chamberlain’s replacement steps include no reprogramming.
A beep about every 2 seconds with a solid orange light means the opener is running on battery power. A beep about every 30 seconds with a flashing orange light means low battery. A solid red light means the battery is dead and cannot recharge.
What the 4228 Fits, and What It Does Not
Chamberlain’s own model pages list the 4228 or G4228 for the openers below. This is a sample, not a full list. Confirm your exact model in its parts list or manual.
- B2215TUltra-Quiet Wi-Fi opener
- B2211TUltra-Quiet Wi-Fi opener
- B2210TUltra-Quiet Wi-Fi opener
- B6713TCorner to Corner Lighting
- C2212TChain drive Wi-Fi opener
- B4613TCWi-Fi battery backup opener
- WD1000WFBattery backup, discontinued
- RJO70Wall mount, discontinued
- 041A6357-1Discontinued part number
- 132B2511Old label, use 4228
- 132B2511-1, -2, -3Old labels, use 4228
- Remote controlsUse a coin cell such as CR2032
- myQ door sensorUses a CR2450 battery
- LiftMaster openersUse the part in your manual (485LM)
Safety & Disposal
The 4228 is a lead battery. Chamberlain warns never to dispose of it in a fire, as it may explode. Check your local codes for disposal.
- Disconnect all electric and battery power before any service.
- Wear protective gloves and eye protection.
- Use only Chamberlain’s designated replacement parts.
- Recycle the old battery and follow local disposal codes.
Chamberlain Opener Battery: FAQ
What battery does a Chamberlain garage door opener use for backup?
Compatible Chamberlain openers with battery backup use a 12V, 4.5 Ah rechargeable backup battery sold as the 4228 (also listed as G4228). Remotes and door sensors use different batteries.
Is the Chamberlain 4228 rechargeable?
Yes. The opener charges the battery while it is connected to mains power. Chamberlain’s manual says a full charge takes about 24 hours.
How long does the backup battery last in a power outage?
Chamberlain says a fully charged battery provides 24 hours of standby time, during which the opener can run up to 20 full cycles at room temperature. It is not 24 hours of continuous motor use.
How often should I replace the battery?
Chamberlain’s support FAQ estimates about 1 to 2 years with normal use. Replace it sooner if the battery light stays solid red, or if it does not return to flashing green once mains power is confirmed.
Will the 4228 fit any Chamberlain opener?
No. It is for compatible openers that already have a battery backup system. Check your model’s parts list before you buy.
Can I use any 12V battery instead?
Chamberlain’s replacement instructions say to use only its designated parts, 4228 and 41A6357-1. A matching voltage alone does not confirm compatibility.
Do I need to reprogram the opener after changing the battery?
Chamberlain’s battery replacement procedure has no programming or reset step.
Why is my opener beeping?
A beep about every 2 seconds with a solid orange light means the opener is running on battery power. A beep about every 30 seconds with a flashing orange light means the battery is low, and with a solid red light it means the battery is dead and cannot recharge.
Will the opener work normally on battery power?
Not always. In the Chamberlain WD962KEV manual, the opener lights do not turn on in battery backup mode, and the opener may run slower if the battery is not fully charged. Check your own model’s manual.
How should I dispose of the old battery?
Recycle it and check your local codes for disposal. Never put it in a fire, as the battery may explode.
