LiftMaster · Garage remotes
LiftMaster 891LM battery
1 × 3V lithium coin cell
How to replace it
| How to open | Pry open the case first in the middle with the visor clip, then at each side. Remove old cell. Insert CR2032 positive side up. Replace cover. |
|---|---|
| Tools | Visor clip used as pry tool (per instruction sheet) |
| Orientation | Positive (+) side up |
| Low battery indicator | LED does not flash when button is pressed |
| Access | tool_assisted |
Important
- Identify by remote model (891LM) on the transmitter.
Sources
Helpful for this device
Optional tools for opening, testing or charging — separate from the battery answer.
- Fluke 101 Digital Multimeter
Accurate open-circuit voltage and basic electrical checks
- Klein Tools MM400 Multimeter
General DC voltage checks including battery terminals
- Digital multimeter
Measure open-circuit voltage and general electronics checks
New battery but still not working?
A fresh 1 × CR2032 should restore LiftMaster 891LM if the battery was the problem. Work through the checks below before replacing the device.
- Check orientation
Confirm the cell is seated correctly: Positive (+) side up
- Check the battery type
This device needs 1 × CR2032 (lithium). Rechargeable cells are not supported for this device. Same size does not always mean the same battery.
- Check known model-specific issues
Identify by remote model (891LM) on the transmitter.
- Confirm the battery itself
For most coin cells, fitting a known-good fresh cell of the correct code is simpler than capacity testing.
- Still not responding?
If a correct, fresh battery installed properly does not restore the device, the fault may be elsewhere — the device may need service or replacement.