Kidde · Smoke & CO alarms
Kidde i1040 battery
Not replaceable
Sealed pack — replace the unit at end-of-life
This alarm uses a sealed long-life pack that is not user-replaceable. Replace the whole unit at end-of-life — do not buy a loose cell.
How to replace it
| How to open | Not user-replaceable. When the sealed pack is exhausted, replace the entire alarm. |
|---|---|
| Orientation | |
| Low battery indicator | End-of-life / replace-alarm chirp after ~10 years |
| Notes | Kidde: sealed-in lithium battery for ~10 years — never change a battery; replace the unit. |
| Access | Not user-replaceable |
Important
- Sealed 10-year pack — do not open the unit or buy a 9V/AA for this model.
- End-of-life means replace the alarm, not the cell.
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
Need to replace the device?
Kidde i1040 is still sold new. Only buy another if a fresh battery and the checks above did not help.