Princeton Tec Fuel 4 Headlamp

Priced: $20.99 - $29.99 Rated:   - 3 stars out of 5 by 43 reviews.
Princeton Tec Fuel 4 Headlamp
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Princeton Tec Fuel 4 Headlamp -
Princeton Tec Fuel 4 Headlamp Features.

Princeton Tec Fuel 4 Headlamp.
Keeping it's promise to keep up with technology and making life easier, The Princeton Tec Fuel 4 Headlamp is very small and simple to use. The headlamp is very lightweight and robust. It is a kind of smart design. The headlamp has 70 lumens of brightness and 146 hours of burn time. It also features an asymmetrical single arm bracket that makes directing the light effortlessly and steadfast . The headlamps push button switch is very easy to find. It has easy access battery door that protects the 3 AAA Alkaline batteries from any damage. You can depend on it as it is very tough. The headlamp offered in 4 different color choices. Thus grab the Princeton Tec Fuel 4 Headlamp for enhanced outdoor experience.

Key Features.
Warranty Information.

This product has a limited lifetime warranty.
(609) 298-9331


  • Smart technology Promises of actually making our lives easier.
  • A large, easy to find push button switch and a virtually bulletproof, easy access battery door that protects the 3AAA s
  • Easy to open battery door with a positive snap closure.
  • Technology should be simple
  • With all of the touch points of the product being considered
  • Ultrabright, now with 4 LEDs for powerful flood light and long burn times.
  • Designed to meet the widest range of applications while remaining small, lightweight and robust. Yea, thats pretty much it
  • Weighs only 3 oz. (78 g) with batteries with 43 lumens of brightness and 146 hours of burn time
  • Four ultrabright LEDs, ideal for close to mid-range tasks
  • Asymmetrical single arm bracket that makes directing the light effortless and reliable.
  • Limited lifetime warranty
  • 3 AAA Energizer batteries included
  • Large , easy to find push button switch designed to be compatible with gloves.
  • Water resistance to splashing and quick dunkings
  • 4-mode switch includes 3 brightness mode and a strobe mode
Paragon Sports
The Princeton Tec Fuel 4 Headlamp: When applied well, technology should be simple. Such is the case with the innovative Fuel headlamp – designed to meet the widest range of applications while remaining small, lightweight and robust. With all of the touch points of the product being considered, the Fuel’s smart design fulfills technology’s promise of actually making lives easier. What could be better than a light that weighs only 78g with 43 lumens of brightness and 146 hours of burn time? A light that also has an asymmetrical single arm bracket that makes directing the light effortless and reliable; a large, easy to find push button switch and a virtually bulletproof, easy access battery door that protects the 3AAAs and its electronics.

Weighing only 2.7 ounces with 70 lumens of brightness and 5 hours of burn time on high, 146 hours on low. The Fuel 4 packs a powerful punch in a lightweight, compact package. Fuel gives you a wide pattern of light that will shine up to 85' in high mode. An asymmetrical pivoting head makes directing the light effortless and reliable, and the durable ultralight strap provides plenty of adjustment for the perfect fit.


Eastern Mountain Sports (EMS)
Designed with three brightness modes to meet the widest range of use, the Princeton Tec Fuel 4 LED is lightweight (3 oz.) and compact.
Jenson USA

The Fuel emits 70 lumens of bright light, with a run time of 146 hours. This impressive light also weighs in at an impressive 78 grams. Perfect for a light hike or run, rummaging through your pack during the dead of night, or taking out the trash barrels in the dark.

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Average Price History: Price History
Review RatingNumber of Reviews
4 Modes:High
Adjustable Focus:No
Batteries:3AAA Alkaline (included)
Brightness Modes:3
Bulb Type:LED
Bulbs:4 LEDs
Flash:96 Hours
Low:13 Lumens / 146 Hours / 28 Meters
Maximum Battery Life:146 hr.
Maximum Range:39 m
Med:25 Lumens / 90 Hours / 37 Meters
Strobe Mode:Yes
Water Resistant:Yes
Weight:78g / 2.75 oz.
Weight W/ Batteries:2.75 oz.
Compare specifications to related products.

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Subcategories of Lights & Headlamps:

Princeton Tec Fuel 4 Headlamp Reviews:

Positive Reviews:

Good value for the performance.

I've only had this product a few days, so I can't speak to any long-term testing, but in the couple of times I've used for night running I've been pleased.

It's lightweight and doesn't bounce, which is great when I'm running. The brightness modes are nice, but let's face it, you'll rarely switch from the brightest mode unless you're out in the backcountry and trying to conserve battery life. The watertightness is great for me as I sweat a fair amount during a run and haven't had any issues yet.

The only bad thing I can come up with is that it's a bit uncomfortable after any extended wearing. I wish they would've put a small amount of foam or rubber behind the bracket that rests against your forehead. It's not unbearable, just annoying.
Are_Emm89 at Eastern Mountain Sports (EMS) on 12/12/2009

Fatal Flaw

I bought this two years ago for a weekend camping trip and was glad I had it during Hurricane Sandy. I also found if very useful for fixing things around the house in dim locations. BUT, like many others, I was disappointed when I noticed the battery door latch had cracked. I had only changed the batteries three times before and had always used the tool on the headband to open the latch. Yet, it cracked and while it still works, I know it won't survive another battery change or two. I really would like replace it with another P-Tec product, but this has made me wary. It's a shame because other than the latch, this is a very nice headlight.
David at Eastern Mountain Sports (EMS) on 03/03/2013

More than I expected.

I have other lights with Luxeon/maxbright LEDs and expected the fuel to be dim with only 4 conventional LEDs.
I was wrong.
This thing is plenty bright for night hiking and seeing what essentials are in front of you. Plus, it's sturdily made while being simple.
I wouldn't go mountainbiking in the dead of night with this alone, but it will definitely get you out of the woods.
Wbure at Eastern Mountain Sports (EMS) on 12/12/2010

Just what I wanted

I bought this light so that I could continue snowshoeing and hiking without having to worry about getting out of the woods by sundown. It fits very securely on my hat and the beam is incredibly bright. I find that I use the light whenever I go out at night, be it to the car, or walking the dog, or just digging around in a dark closet, it does the trick!
Sam at Eastern Mountain Sports (EMS) on 01/01/2010

Love it...but

I really like this headlamp. Unfortunately, the plastic broke on the clip of the battery door. I have to use duck tape and rubber bands to keep the battery compartment closed to use it.

That said, I really like it and will likely replace it with a new one.

If you are from Princeton Tec feel free to contact me to replace it for free :-)
Holdenadventure at Eastern Mountain Sports (EMS) on 06/06/2013

Good solid quality light

Great sturdy light with a solid construction. The beam adjustment is nice and holds itself inplace nicely. The only thing that I was hoping with this light is that it would have more distance instead of being such a broad beam. I can't say there are any cons to this light, it's of great quality and I highly recommend it.
Gary the casual hiker at Eastern Mountain Sports (EMS) on 01/01/2010

great AAA LED headlamp

Great as a back-up headlamp for caving. I've tried a few similar lights. Cheaper than comparable lamps and the design seems more robust. Could've done better for caving though, since there are unnecessary rough edges and even recesses mud can (will) get stuck in. Princeton Tec, as usual, makes a solid lighting product for the price and purpose.
JB at Eastern Mountain Sports (EMS) on 01/01/2010

Basic headlamp that delivers

I got the pink fuel headlamp for my wife and after my headlamp broke, I "borrowed" it on several occasions. Now I got the OD version for myself. If you need light for general nocturnal backpacking chores, this one is great. Lightweight and easy to control. I keep it by my bed for power outages as well.
Meyer-Pflug at Campmor on 07/07/2010

Works great!

Works great! And it's PINK so my husband won't take it. But that's what I said about my pink coffee press mug, and that disappeared... oh well. Great headlamp - sturdy, reliable, plenty bright. Keep it hanging from the rear view mirror so it's always handy.
HappyCamperToo at Campmor on 11/11/2010

Very Useful for camping

I used it only once so far for car camping. Very bright and very useful for handsfree usage. I wish it would be a little dimmer on the dim setting. Reading at night at the campsite provided an attraction for bugs. But very happy overall.
Ty at Eastern Mountain Sports (EMS) on 10/10/2010

Negative Reviews:

Two time loser

I bought two of these, for myself and for my son. Mine worked well enough last hunting season until I went to replace the battery when the latch that keeps the battery compartment shut broke off. I didn't think much of it until this past month when son returned from Alaska. Due to it being light about 21 hours a day, he never used it but when he unpacked his pack...the latch on the battery compartment was broken. The only problem piece of equipment in 2 weeks of backpacking. I give kudos to the Dulles store manager who didn't hesitate to give a full credit which I immediately applied to a Petzl.
Not in the dark at Eastern Mountain Sports (EMS) on 07/07/2012

Great light but bad battery door design.

I bought this light for backpacking, canoe camping, hunting, hiking... everything! It has a great combination of power, ease of use, light weight, and long battery life.

Unfortunately, the flimsy battery door latch makes the light unreliable. Mine just broke a few minutes ago as I was putting in new batteries for a canoe camping trip that starts tomorrow. I have only used the light twice since I bought it. Good thing I own other headlamps!

The Princeton Tec website describes the FUEL's simple battery door and latch "bulletproof." Funny. Read other reviews to see how many of the bulletproof latches have broken.
desmobob at Campmor on 10/10/2013

Not durable

As others have mentioned, this would be a great headlamp, EXCEPT for the remarkably weak battery door design. The door hinges, and has springs to push the batteries against the contacts inside. This means that the latch of the battery door is under some pressure. The problem is that the thin piece of plastic that latches the door is SO thin that it breaks VERY easily.

Really, really poor design. I used mine for a single one-week camping trip before the flimsy plastic latch failed. Until they fix this, I would stay away from this headlamp.
Sicon at Campmor on 07/07/2013

Issues With Batery Door

I purchased a few of these for family after hurricane Sandy. I returned them because the battery door latch was difficult to open. It required something to pry it open. In the cold and darkness of an extended power outage, I don't see this as being desirable. The latch itself seemed brittle and possibly prone to breaking from using a screwdriver or butterknife to pry it open. This is a great company but a bad design. I returned all 4 and got Petzl Tikkas instead. The latch opens much easier with a finger while remaining water resistant.
echardcore at Eastern Mountain Sports (EMS) on 12/12/2012

poorly designed battery compartment

Needed a good headlamp to run outdoors in the dark evenings. Saw other reviews about the battery compartment. Thought that I would have better results. Upon receipt I followed the instructions using the tab on the head band strap to open up the unit and insert the supplied batteries - the battery door broke! Obvious design, quality flaw. A deal breaker for what would otherwise be a good product. When will Princeton Tec address this? If it was a car it would be subject to the lemon law!
Marathon Man at Campmor on 01/01/2012

Broke within an hour

I bought two of these for my sons. One works pretty well. It's comfortable and bright. One big complaint we have with that one is that it's hard to push the button to adjust the brightness while it's on your head.
The other one I bought promptly broke. The plastic guide for the head band snapped off rendering it useless. I was very unimpressed with the quality.
Little Mountain Climber at Eastern Mountain Sports (EMS) on 04/04/2012

Not Durable

I got this as a gift and i took it on maybe 2 camping trips and the batter compartment popped open. i thought no big deal, so i fixed it with a little bit of duct tape and it worked for maybe 8 days until the other side of the battery compartment popped open.
Henry the Scout at Campmor on 06/06/2012

Battery Door Breaks Easily

I bought this for my wife after owning the Princeton Tec Quad Headlamp... just wanted to try a different model. The battery door broke shortly after owning it. I like the performance of the light otherwise. Until they can ameliorate this problem I will be going back to the Quad Headlamp model.
Kurt Yurt at Campmor on 02/02/2012

Durability(battery door) an issue

I have had 3 of these lights, I do love the light itself, but the battery door has broken on all 3 of my lamps. I replaced on at the local store, but having to ship the others back is too much hassle. I wish they would just re-engineer the battery compartment!
Lou at Campmor on 12/12/2010


Very bright,nice product except I dropped mine once and like other reviewers the battery compartment door broke. No way to jury rig so its now useless. If they can fix the problems with the door I would buy another, until they do I'll use another brand left in the dark.
davidV at Campmor on 04/04/2012

Neutral Reviews:

Good light, Cheap plastic

The light works fine, just be aware that the "latch" for the battery compartment is very thin, and not very durable plastic. My son was given one and we are now on our third one, the previous 2 have cracked in the same spot, and not from misuse.
I would not recommend this to someone who has this as their only source of light and might need to change the battery during a trip.
HappyinNH at Eastern Mountain Sports (EMS) on 11/11/2011

Lot's of good, lot's of bad.

The best headlamps(4)I ever owned BUT !!!! Flimsy quality, 2 hinges, 2 latches, and one endcap have cracked on me under normal light duty, BBQing, around the house work, etc. OK every one was replaced and Mfg. and WM CS was great but still what a pain !!!
G-man at on 10/10/2011

worked at Philmont

light was great. Outperformed most others. Durability is an issue as the hinged cover broke after the 1st or 2nd time the battery was removed.
chop at Campmor on 11/11/2010