The best flashlights to keep in a car
The argument is not that a flashlight is better than your phone. It is that your phone is the thing you call for help with, and pointing it at a wheel nut for twenty minutes is the wrong use of a finite battery.
By Sawyer V. · Published · How we research
We have not tested any of this. Everything below is compiled from published manufacturer specifications, and the arithmetic is printed so you can check it. This page carries affiliate links: if you buy through one we earn a commission at no extra cost to you, and it does not change the order of the picks. Full disclosure.
The short answer
Buy the Anker Bolder LC90. It publishes all three numbers that matter and almost nobody in this category publishes even two: 900 lumens, up to 6 hours of runtime, and an IPX5 ingress rating — which is rain resistance, and a breakdown happens in the rain often enough for that to be the point. It is rechargeable with an 18650 cell included, so there is no scramble for AAs, and it has SOS and strobe modes, which are exactly the modes a roadside light needs.
| # | Pick | Install | Score | Price |
|---|---|---|---|---|
| 1 | Anker Bolder LC90 Flashlight A light that is not your phone | Drops in | 8.8/10 | Check price on Amazon |
| 2 | AstroAI Heavy Duty Tire Gauge (230 PSI) The tighter calibration grade | Drops in | 8.6/10 | Check price on Amazon |
| 3 | NOCO Boost Plus GB40 Not needing anybody else's car | Plugs in | 8.0/10 | Check price on Amazon |
No live price is currently verified, so every button here reads Check price rather than a number we cannot stand behind. Why we do it that way.
Why not just use your phone
You can, and for thirty seconds it is fine. The problem is the situations where you actually need light in a car:
- You are broken down at night. Your phone is how you call for recovery, how you tell someone where you are, and how you wait. Its battery is the resource you are protecting, not spending.
- You need both hands. Changing a wheel, checking under the hood, reconnecting a battery. A phone has to be propped somewhere and it always points at the wrong thing.
- It is raining. Your phone is probably rated for it and you are still not going to want it out in it.
- You need to be seen. A phone torch cannot strobe usefully. Being visible on a shoulder at night is a genuine safety function.
The three numbers, and why runtime is the honest one
| Specification | What it tells you | Anker LC90 |
|---|---|---|
| Lumens | Brightness at the source | 900 |
| Runtime | How long before it is useless | Up to 6 hours |
| Ingress rating | Whether rain kills it | IPX5 |
| Beam distance | Reach in a straight line | Stated over 660 ft |
Lumens is the headline and it is the least useful of the three on its own. A very bright light with a 40-minute runtime is worse for this job than a moderate one that lasts, and brightness modes trade directly against duration — 900 lumens on high and 6 hours of runtime are not the same setting.
What IPX5 actually means
The IP scale has two digits: solids then liquids. An X means the maker did not test that one. So IPX5 is “dust ingress not rated, water jets from any direction do not cause harmful effects”.
In practice that is rain and splashes, which covers the roadside case. It is explicitly not submersion — dropping it in a puddle is a different rating, and IPX5 does not promise it survives.
Almost nothing else in the car-flashlight aisle publishes an IP rating at all, and a light that has not been rated for water is a light nobody has checked.
Rechargeable or disposable
Rechargeable wins on cost and on not discovering the AAs corroded in the battery compartment. It loses on the self-discharge problem above.
The genuine argument for disposable cells in a car is that lithium primary batteries (not the rechargeable kind) hold charge for years and tolerate heat and cold better than almost anything else. If you are the sort of person who will genuinely never charge anything, a light taking lithium AAs is the more honest purchase.
For everyone else: rechargeable, plus the twice-a-year reminder.
You may already own a light
Two things in a well-stocked trunk have a light built in, and it is worth knowing before buying a third:
- The jump starter. NOCO publishes a 100-lumen light on the GB40. That is not a work light, and it is enough to see terminals and clamps — which is precisely when you need it.
- The tire gauge. The heavy-duty AstroAI publishes a built-in flashlight, which sounds like a gimmick until you are checking a valve stem in the dark, which is when you always check valve stems.
If your needs are “see a valve stem” and “see a battery terminal”, those two cover it. A dedicated light is for changing a wheel, working under the hood, and being visible.
Where to keep it
In the cabin, not the trunk — glovebox or door pocket. The trunk is the wrong place for the thing you need in order to safely get to the trunk at night on a shoulder.
Everything else roadside lives in the trunk, ideally in an organizer so it is not distributed across the floor. The emergency kit page covers the full list and what actually belongs in it.
Every pick, with the working
Each entry lists the specifications the maker publishes, the axis scores those specifications produce, and what you give up. Rows that read “Not published” are not omissions on our side: they are things the maker will not commit to in writing, and they cost the product points on the transparency axis. Specifications compiled September 4, 2026.
Our pickA light that is not your phone
Anker Bolder LC90 Flashlight
900 lumens from a CREE LED, a published 6-hour runtime, IPX5 water resistance and five modes including strobe and SOS, on a rechargeable 18650. Using a phone as a flashlight at the roadside drains the one device you need to call for help, which is the entire argument for keeping a real one in the car.
- Output
- 900 lumens, CREE LED
- Runtime
- Up to 6 hours
- Ingress rating
- IPX5
- Modes
- High, medium, low, strobe, SOS
- Beam
- Zoomable
- Battery
- Rechargeable 18650, included
- Stated beam distance
- Over 660 ft
- Operating range
- Not published
What it gets right
- Published lumens (900), runtime (6 h) and ingress rating (IPX5) — all three, which is rare at this price
- Rechargeable 18650 included, so there is no scramble for AAs
- Zoomable from flood to spot, which covers both 'find the dropped bolt' and 'signal from the shoulder'
- SOS and strobe modes, which are exactly the modes a roadside light needs
Flaws
- IPX5 is rain resistance, not submersion. Fine for a breakdown, not for dropping in a puddle
- A lithium cell in a hot trunk self-discharges, so it needs charging on a schedule like the jump starter does
- 900 lumens on high for 6 hours is not the same as 900 lumens for 6 hours; brightness steps down between modes
The working behind the 8.8
- Heat headroom: not scored (weight 22%)
- The maker publishes no operating-temperature ceiling, so this axis is dropped and the other weights are re-normalized.
- Install effort: 10.0 (weight 24%)
- Drops in and sits there. No fixing of any kind, and it comes out again when you sell the car.
- Price against the ceiling: not scored (weight 24%)
- No published list price we could cite on the compile date, so this axis is dropped and the other weights are re-normalized.
- Written commitment: 7.0 (weight 15%)
- 18-month warranty. This is the only promise in the entire listing that a court would read, which is why it is scored and the marketing copy is not.
- Spec transparency: 8.8 (weight 15%)
- 7 of the 8 specifications we went looking for are published by the maker (88%). A blank row is never a guess here: it prints “Not published” and it costs the product points, because a figure nobody will commit to in writing is a figure you cannot check.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled September 4, 2026 from Anker Bolder LC90 published specifications.
2The tighter calibration grade
AstroAI Heavy Duty Tire Gauge (230 PSI)
Skip this one. It has a flashlight in it and it is a tire gauge. It is on this page as the honest note that several tools you may already own include a small light, and if all you need is enough to see a valve stem, you may not need a dedicated torch at all.
0 to 230 PSI in a stainless body, calibrated to ANSI B40.7 Grade 2A — which is a stated 0.5 percent accuracy rather than a flat plus-or-minus figure, and is the tightest calibration claim in this ledger. It also has a flashlight in it, which sounds like a gimmick until the first time you check pressures at night.
- Range
- 0-230 PSI / 0-16 Bar / 0-16 Kg/cm2 / 0-1585 kPa
- Calibration standard
- ANSI B40.7 Grade 2A (0.5%)
- Body
- Stainless steel
- Display
- Backlit LCD with flashlight
- Units
- PSI, Bar, Kgf/cm2, kPa
- Resolution
- Not published
- List price
- Not published
- Warranty
- Not published
What it gets right
- ANSI B40.7 Grade 2A, published — 0.5% accuracy is a genuinely tighter claim than plus or minus 1 PSI
- Stainless steel body rather than plastic, which survives a glovebox
- Built-in flashlight and backlit LCD, and tire valves are always in the dark
- Covers truck and RV pressures as well, so one gauge does every vehicle you own
Flaws
- 230 PSI on a car that runs at 35 means you are using the bottom seventh of the scale
- Bigger and heavier than the compact gauge for accuracy most drivers will never need
- Still a battery device that will be flat when you need it if you never check
The working behind the 8.6
- Heat headroom: not scored (weight 22%)
- The maker publishes no operating-temperature ceiling, so this axis is dropped and the other weights are re-normalized.
- Install effort: 10.0 (weight 24%)
- Drops in and sits there. No fixing of any kind, and it comes out again when you sell the car.
- Price against the ceiling: not scored (weight 24%)
- No published list price we could cite on the compile date, so this axis is dropped and the other weights are re-normalized.
- Written commitment: not scored (weight 15%)
- No warranty term published, so this axis is dropped and the other weights are re-normalized.
- Spec transparency: 6.3 (weight 15%)
- 5 of the 8 specifications we went looking for are published by the maker (63%). A blank row is never a guess here: it prints “Not published” and it costs the product points, because a figure nobody will commit to in writing is a figure you cannot check.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled September 4, 2026 from AstroAI 230 PSI heavy duty gauge published specifications.
3Not needing anybody else's car
NOCO Boost Plus GB40
1,000 peak amps out of a 24 watt-hour lithium pack that weighs 2.4 pounds, rated for petrol engines to 6.0 liters and diesel to 3.0, with spark-proof clamps and reverse-polarity protection. It is the single accessory here that changes what happens on the worst morning of your year, and it fits in a glovebox.
- Peak amps
- 1,000 A
- Battery
- 24 Wh lithium-ion
- Engine ceiling
- Gasoline to 6.0 L, diesel to 3.0 L
- Starts per charge
- Up to 20
- Dimensions
- 7.7 x 3.2 x 1.7 in
- Weight
- 2.4 lb with clamps
- Light
- 100 lumens
- Safety
- Spark proof, reverse polarity protected
- Operating range
- Not published
List price $99.95 per NOCO's listed price, captured on the compile date below. Not a live price and not what you will pay — the button is where the real number is.
What it gets right
- 1,000 peak amps and up to 20 starts on one charge, both published
- Spark-proof and reverse-polarity protected, which matters when you are doing this in the dark
- 2.4 lb and 7.7 inches long — it genuinely lives in the car rather than the garage
- USB port and a 100-lumen light, so it is also the thing you reach for in a power cut
Flaws
- Lithium, so it self-discharges and needs topping up every few months or it is a brick when you need it
- 6.0 L petrol and 3.0 L diesel is the published ceiling — a big diesel needs the bigger model
- $99.95 for something you hope never to use
The working behind the 8.0
- Heat headroom: not scored (weight 22%)
- The maker publishes no operating-temperature ceiling, so this axis is dropped and the other weights are re-normalized.
- Install effort: 10.0 (weight 24%)
- Plugs into a 12V socket or a USB port. Nothing to mount, nothing to route, reversible in a second.
- Price against the ceiling: 7.0 (weight 24%)
- Listed at $99.95 on the compile date. This site's buyer has a practical ceiling around $150 for a single upgrade, so the scale rewards everything under $100 and falls away sharply past $150. The live price is very often different, and that is what the button is for.
- Written commitment: 5.5 (weight 15%)
- 12-month warranty. This is the only promise in the entire listing that a court would read, which is why it is scored and the marketing copy is not.
- Spec transparency: 8.9 (weight 15%)
- 8 of the 9 specifications we went looking for are published by the maker (89%). A blank row is never a guess here: it prints “Not published” and it costs the product points, because a figure nobody will commit to in writing is a figure you cannot check.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled September 4, 2026 from NOCO Boost Plus GB40 published specifications.
No live price is currently verified, so every button here reads Check price rather than a number we cannot stand behind. Why we do it that way.
Questions people actually ask
Why not just use my phone as a flashlight?
Because your phone is how you call for help and tell someone where you are. Spending its battery on lighting a wheel change is the wrong use of a finite resource, and a phone cannot strobe to make you visible.
How many lumens do I need?
Fewer than the marketing suggests. Runtime and water rating matter more — a very bright light with a 40-minute runtime is worse for this job than a moderate one that lasts. 900 lumens with 6 hours published is a good balance.
What does IPX5 mean?
Water jets from any direction cause no harmful effect — so rain and splashes are fine. The X means dust ingress was not tested. It explicitly does not cover submersion.
Where should I keep it in the car?
The glovebox or a door pocket, not the trunk. The trunk is the wrong place for the tool you need in order to safely get to the trunk at night.