Yes. TSA allows flashlights in both carry-on and checked bags, with no size limit listed. Spare lithium batteries for the flashlight must go in your carry-on.
Allowed; TSA lists no size limit. As with any item, the officer has the final say if it looks like it could be used as a weapon.
Allowed. If it runs on lithium batteries, make sure it can't switch on in the bag (lock it out or reverse/remove the battery) and keep spare lithium cells in your carry-on.
Checked against official TSA, FAA and government pages on . These are US rules unless we say otherwise; the TSA officer at the checkpoint makes the final call.
The rules in numbers
- TSA lists no size limit for flashlights
- Spare lithium cells (e.g. 18650, CR123A): carry-on only; lithium-ion max 100 Wh, lithium-metal max 2 g
- Alkaline/NiMH spares: allowed in either bag if protected
Packing tips
- Bright flashlights can turn on in a packed bag and get very hot; use the lockout mode or unscrew the tailcap slightly.
- Loose 18650 cells need individual cases or taped terminals.
Questions people ask
Is there a size limit for flashlights in carry-on?
TSA lists flashlights as allowed in carry-on and checked bags without a size limit, though officers have final say on any item.
Can I bring a rechargeable flashlight on a plane?
Yes. It can go in either bag; if checked, make sure it can't turn on, and keep spare lithium batteries in your carry-on.