Best flashlights for a car emergency kit

Keep a Streamlight PolyTac in the car. It runs on two CR123A lithium primaries that Energizer rates for storage and operation from -40 C to 60 C, it publishes a runtime for all three of its modes, and it is rated IPX7 with a 3 m impact figure - so it is the pick for the one job a car light has, which is working at the roadside two years after you forgot about it. If you would rather have your hands free to change a wheel, add a Petzl Tikkina headlamp for about twenty dollars.

We have not tested any of these lights. We own none of them and have no laboratory. What follows is the makers' own published figures, the cell manufacturers' own datasheets, and the arithmetic those allow - see our methodology.

How we judged this

Nothing on this page is ranked on brightness. A glovebox light spends years doing nothing and then has to work once, in the dark, possibly in a January night or an August afternoon, held by someone who is already having a bad day. That gives a specific and unusual order of criteria:

1. Shelf life of the power source. The cell has to hold its charge for years, unattended, with nobody topping it up.
2. Published temperature range. A car is the harshest place a household stores a battery. It goes below freezing and it sits in the sun.
3. A runtime figure you can plan with. Not a headline maximum - a number per mode, so you know what you have.
4. Weather and impact rating. Roadside work happens in rain, on gravel, next to traffic.
5. Enough spill to work by, and ideally the ability to put it down or wear it. Reach is the least useful property here.

Cell chemistry, from the cell makers' own datasheets

Flashlight manufacturers publish what their lights do. Only the battery manufacturers publish what the battery does at temperature or after a decade in a drawer, and those figures are the whole argument of this page. All three of the sheets below are Energizer's own, read on October 17, 2026.

Read the alkaline row against the two lithium rows and the case makes itself. A lithium AA is rated 22 degrees Celsius colder at the bottom of its range, five degrees hotter at the top, holds its charge for two and a half times as long, and weighs a third less. Those are the printed specification lines on Energizer's own sheets, not our inference.

One honest gap: the CR123A sheet we read states the operating and storage range but no shelf-life figure, so we do not quote one for it. The widely repeated ten-year number for CR123A is not on the document we are citing, and we are not going to assert it on Energizer's behalf.

The other thing worth knowing is what alkalines do when they fail, which is leak. Over several years in a warm place the cells vent potassium hydroxide, and the leak usually destroys the light around them. If you are putting alkalines in a car light, store them beside it rather than inside it. Cell formats explained covers the rest of the chemistry.

Why the PolyTac wins on arithmetic as well as chemistry

Two of the picks here run on the same pair of CR123A cells, and because Energizer publishes the cell's capacity and both makers publish per-mode runtimes, it is possible to work out which light does more with the same energy.

That is the shape of this whole category: the figures that decide it are published by three different companies and have to be put on the same axis before they say anything. How runtime is defined sets out the FL 1 rules the hours above are measured under.

What each pick is for

[Streamlight PolyTac](/tactical-flashlights/streamlight-polytac-review) - best for the one light that has to work. 600 lumens, 11,500 candela and 214 m, with 2.75 h / 5.5 h / 34 h published across three modes, 119 g with its cells in, IPX7 and a 3 m impact rating. The two CR123A primaries come in the box. The published candela and the published distance reconcile with each other in every mode, which almost nothing else in this price range manages. Its honest downside is that a polymer duty light is a plain object with no magnet, no clip worth the name and no low mode under 35 lumens.

[Petzl Tikkina](/headlamps/petzl-tikkina-review) - best for actually fixing something. Changing a wheel or looking for a fuse with a torch in your teeth is the argument for a headlamp, and this is the cheapest one we would put in a car. Petzl publishes the complete ANSI FL 1 table: 300 lm over 65 m for 2 h 30 min, 100 lm over 40 m for 10 h, and 7 lm for 100 h, on three AAA cells. Swap the alkalines for lithium AAA and the datasheet range goes to -40 C for 7.6 g a cell. Downsides: no red mode at all, IPX4 rain resistance only, and nothing rechargeable in the box.

[Acebeam Pokelit AA](/edc-flashlights/acebeam-pokelit-aa-review) - best for seeing what you are looking at. Fluid colors and wire colors are the two things you most need to read correctly at a roadside, and this is one of only two lights on this site whose maker publishes a color rendering figure: CRI 90 or better from a Nichia 219F. It also publishes 1,849 candela, 86 m, three per-mode runtimes, 54.6 g and IP68 immersion. Note what comes in the box, though: a 14500 lithium-ion cell, which is a rechargeable and therefore exactly the thing this page warns about. Buy it for the car and run it on a plain AA - Acebeam publishes no separate figures for that cell, which is the gap on an otherwise exemplary sheet.

[Maglite Mini LED 2-Cell AA](/edc-flashlights/mini-maglite-led-review) - best for the cheapest honest answer. 127 lumens, 6,093 candela and 156 m, with 11 h on high and 25 h on low, on two AA cells, from the maker with the most complete spec sheet in the category. At 48 candela per lumen it reaches further than anything else here, which matters if you ever have to look at a road sign or walk a shoulder. Downsides: 127 lumens is genuinely dim by modern standards, it is IPX4, and 118 g of aluminum is heavy for the light you get.

[SureFire G2X Pro](/tactical-flashlights/surefire-g2x-pro-review) - best for buy-it-once. Two modes, no strobe, 600 lumens and 8,700 candela over 187 m on high, and 15 lumens for a published 52 hours on low - which is the single most useful figure on this page for an emergency, because 52 hours of usable light is more than any other pick here commits to. 125 g, IPX7, two CR123A cells. Downsides: it costs several times the Maglite, the high mode lasts 1 h 30 min, and SureFire publishes no impact rating for it.

What we would not put in a car, and why

Anything with a sealed rechargeable cell and no battery fallback. This rules out several lights we rate highly elsewhere on the site. A rechargeable work light is the right tool when you use it weekly and charge it; it is the wrong tool for a glovebox, and the reason is self-discharge rather than quality.

A thrower. 1,000 m of reach is useless at arm's length inside an engine bay, and the head diameter that buys the reach will not fit a door pocket. Best flashlight throwers covers them for the open-country job they are actually for.

A lantern. We like the Streamlight Siege a great deal for a house in an outage, and it is a poor choice in a vehicle - it is a light you place on a surface, and a roadside has no surface. Flashlight versus lantern sets out which is which.

The kit, if you want the whole answer

One light is a compromise. If you are assembling a kit rather than buying a single object, the arrangement we would defend is a handheld on lithium primaries in the glovebox, a headlamp in the door pocket, and spare cells in a sealed bag rather than loose. The power-outage lighting kit page applies the same logic to a house, and the reasoning transfers directly.

What we will not tell you is how hot your particular car gets, because we have not measured it and nobody publishes a figure for your parking space. What we can tell you is the published number on the other side of that question: 60 C, or 140 F, is the top of the stated storage range for all three lithium chemistries above, and 55 C for the alkaline. Decide against that rather than against a guess of ours.