Mag Instrument (Maglite) · Flashlights
Maglite Solitaire LED battery
1 × 1.5V alkaline cell
Short answer: one AAA alkaline cell. Unscrew the tail cap, replace the cell with the positive (+) end toward the lamp, and tighten. Maglite’s ANSI data assumes alkaline; NiMH may run with lower output. Not the Mini Maglite AAA (two cells) or Mini Maglite AA.
How to replace it
| Compartment | Tail cap |
|---|---|
| How to open | Unscrew the tail cap counterclockwise; remove and replace the single AAA cell; reinstall and tighten for contact. |
| Orientation | Positive (+) end toward the lamp/head (Mag Mini Maglite / Solitaire family practice) |
| Access | Tool-free |
| Notes | Confirm LED Solitaire vs older incandescent Solitaire — both use 1× AAA per Maglite size family FAQs. |
Important
- Do not confuse with Mini Maglite AAA (2× AAA) or Mini Maglite AA (2× AA).
- Maglite published ANSI performance assumes alkaline cells.
- Keep button/cylindrical cells away from children.
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
- Digital multimeter
Measure open-circuit voltage and general electronics checks
New battery but still not working?
A fresh 1 × AAA should restore Mag Instrument (Maglite) Solitaire LED if the battery was the problem. Work through the checks below before replacing the device.
- Check orientation
Confirm the cell is seated correctly: Positive (+) end toward the lamp/head (Mag Mini Maglite / Solitaire family practice)
- Check the battery type
This device needs 1 × AAA (alkaline). Same size does not always mean the same battery.
3 more checks
- Check known model-specific issues
Do not confuse with Mini Maglite AAA (2× AAA) or Mini Maglite AA (2× AA). Maglite published ANSI performance assumes alkaline cells. Keep button/cylindrical cells away from children.
- 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.