Chamberlain · Garage remotes
Chamberlain 940EV keypad battery
1 × 9V alkaline
Chamberlain 940EV keyless entry uses 1× 9V alkaline. Not a CR2032 handheld remote.
How to replace it
| How to open | Insert a flat-head screwdriver into the oval cutout at the top of the battery cover, slide down, replace 9V alkaline, slide cover up until locked. |
|---|---|
| Orientation | Match polarity markings |
| Low battery indicator | App or device low-battery cues where equipped |
| Notes | Chamberlain documents 940EV wireless keyless entry as 9V alkaline (part 10A25 in older sheets). |
| Access | tool_assisted |
Important
- Chamberlain documents 940EV wireless keyless entry as 9V alkaline (part 10A25 in older sheets).
- Not a CR2032 handheld remote answer.
Sources
Helpful for this device
Optional tools for opening, testing or charging — separate from the battery answer.
- Ansmann Energy Check LCD
Quick household cell check (good / low / replace)
- ZTS Mini-MBT Multi-Battery Tester
More informative state-of-charge style checks across common formats
- Battery tester
Quick good / low / dead check for household cells
New battery but still not working?
A fresh 1 × 9V should restore Chamberlain 940EV if the battery was the problem. Work through the checks below before replacing the device.
- Check orientation
Confirm the cell is seated correctly: Match polarity markings
- Check the battery type
This device needs 1 × 9V (alkaline). Rechargeable cells are not supported for this device. Same size does not always mean the same battery.
- Check known model-specific issues
Chamberlain documents 940EV wireless keyless entry as 9V alkaline (part 10A25 in older sheets). Not a CR2032 handheld remote answer.
- Confirm the battery itself
If you have a battery tester or multimeter, check the cell. A low open-circuit voltage often means replace; for rechargeable AA/AAA, a capacity test is more informative than voltage alone.
- 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.
Need to replace the device?
Chamberlain 940EV is still sold new. Only buy another if a fresh battery and the checks above did not help.