|Item Weight||15.4 ounces|
|Product Dimensions||6 x 5 x 4 inches|
|Item model number||RNF4AA-B|
|Item Package Quantity||1|
|Type of Bulb||LED|
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Rayovac RoughNeck 120 Lumen 4AA LED Focus Control Flashlight with Batteries (RNF4AA-B)
|Price:||$14.99 & FREE Shipping on orders over $25. Details|
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- High performance Cree LED lasts 100,000 hours and never needs replacing; 120 lumens
- Adjustable spot to flood focus beam with easy to use thumb switch; magnifier lens provides long range beam
- Features an ABS body, comfort rubber grip, and handy hanging ring for easy storage
- Runs on 4 AA alkaline batteries (included); run time 4 hours
- Withstands a 5 foot drop test; water resistant
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True to its name, Rayovac Roughneck lights are tough and durable. When you need a light that works as hard as you, the Roughneck line will get the job done. With high performance LEDs and standard lifetime warranties, we’ve got the professional level lights for the work you do. Rayovac is a trusted brand of Spectrum Brands Holdings, Inc., a top manufacturer of consumer batteries in the United States and Latin America.
True to its name, Rayovac Roughneck lights are tough and durable. When you need a light that works as hard as you, the Roughneck line gets the job done with high performance LEDs. And you'll know you can rely on it for years to come thanks to its standard lifetime warranty. This Rayovac RNT3AAA metal flashlight features a high-performance Cree LED light that produces up to 120 lumens on its single lighting mode.
The flashlight's durable ABS body with comfort rubber grip can withstand up to a 5-foot. drop. The light beam is adjustable--switch from spot to flood mode--to suit any need, and its magnifier lens provides long-range beam. It also features an easy-to-use thumb switch and a hang ring for easy storage. This flashlight is water resistant. Backed by a limited lifetime warranty.
The Power of LEDs
A perfect light source for modern headlamps, LEDS are virtually unbreakable, and they contain no filament or mercury. Lasting a lifetime, they never need to be replaced. And they use battery power much more efficiently, greatly reducing the number of batteries needed over the life of the light.
The energy efficient Cree LED bulb is powered by four AA batteries (included) for up to 4 hours of continuous use.
What's in the Box
Rayovac RNF4AA-B Roughneck flashlight; four AA batteries
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Top customer reviews
First, the good points...
Let me just say this flashlight is extremely bright. At night, if you focus the beam to infinity and point it 500 feet away, you're going to see the beam in the air all the way to the target. It's intense. It's almost as bright as a high beam light on a car. So it's excellent in that regard.
The other really nice thing about this product is the beam focus control. I use this feature all the time when walking my dogs. When I point it down at the ground near the dog, I want it to be dispersed and wide. But when I'm pointing it off in the distance to see if there are any deer or other animals around, I use the focused beam instead. That lets me see everything.
Because the focus control is located right near the on/off button, I can use it real easily with my thumb. I don't have to use two hands to operate it. I carry the dog leash and the flashlight in one hand, which frees up my other hand to add or remove slack on the leash or use a poop bag. If I had to use two hands to operate the flashlight, it would be much more annoying.
So they got the design of the focus control right.
I have a few other LED based lights and some old incandescent flashlights (Maglite). This product beats them all in terms of brightness, including the giant Maglite I have. It's also much lighter than a Maglite or other traditional flashlights, and the batteries last much longer.
One other thing I really like about this is that it uses AA batteries instead of AAA like a lot of other LED flashlights use. Yes, AAA is lighter, but AA batteries are cheaper, more plentiful, and last longer. I have other LED flashlights that use AAA batteries, and they're pretty wimpy and don't last as long.
Okay, now for the down-sides and why I'm giving this 3 stars instead of 5...
While I think this is still my favorite flashlight of all the flashlights I have, it's only because I don't have another one that's as bright as this one, yet. The problem I've been seeing with it since day one has been the fact that the power seems to cut out frequently, causing the light to flicker or even turn off completely. I have to physically shake it every 5 to 10 seconds to get a solid beam sometimes. This problem seems to get worse as the batteries get worn down. When the batteries are fresh and new, it seems solid and consistent. After a total of one hour of battery use, the problem starts and gets worse and worse.
What's so confusing to me as an electrical engineer is why physically shaking the device would improve things. This would seem to indicate a battery connection problem. But if it's just a battery connection problem, I would expect the problem to exist from the beginning, even with fresh batteries. But it doesn't. So it's strange to me, and I haven't put any effort into figuring out why this happens.
When I look at how the batteries connect up, I do see some design issues. The physical connectors are not typical. It uses two spring-like connectors on the cap piece. This would imply that the negative terminals of the batteries are supposed to be facing the cap. But instead, both negative AND positive terminals are touching these springs. Uh-oh! That's not generally good design practice. I suspect that's the cause of the problem I'm seeing. Doing it that way explains why it seems very sensitive to vibration.
As for battery life, I do see that it lasts a lot longer than my traditional incandescent Maglite flashlight lasts, even though the Maglite uses D sized batteries. But this is not a total win, because for some reason I expected the brightness of the LED to stay the same even when the batteries were running down. A decent power regulator circuit might make that work. But it looks like that wasn't done for this device. Its brightness decreases steadily over time, until you replace the batteries once again. I think I get about 6-8 hours of use with name brand alkaline batteries before it's at 50% of its original brightness. I haven't measured it, though. And maybe I have unrealistic expectations in this regards, because I've not seen a flashlight that stays the same brightness throughout its battery life.
As for the focus of the light, some people have mentioned that it looks more like a ring than a disc of light if you point it on the ground. They are correct. The outer ring of the light beam is definitely brighter than its interior. But this is not a big deal to me. I do think I'd prefer an evenly distributed light beam, but to me it's not worth taking off even a single star from the rating.
So in conclusion: This would be a great flashlight if it weren't for the frequent flickering and spontaneous shutoffs I mentioned. If this is not the typical experience, then maybe I just got a defective unit. In which case, I'd highly recommend taking a risk and buying this. But I suspect it's a fundamental design flaw instead, and so I can not recommend it to others at this time. I was originally going to take three stars off because of this problem but added a star for the wonderful focus control knob design. So, three stars it is.
Hope that helps.
- When compared against the MAGLITE XL50 3xAAA LED flashlight (rated at 104 lumen), the beam produced by the Roughneck is slightly dimmer
- When compared against the MAGLITE Mini 2xAA LED flashlight (rated 69 lumen), the Roughneck is significantly brighter.
(See my photos in 'Customer Images' section for beam shot comparisons)
The above suggests that the light output of Roughneck is closer to 100 lumen, instead of 200 as advertised. But of course, comparison of brightness is not a reliable measurement of the total flux output, because perceived brightness depends on how 'concentrated' is the flux (note that Brightness = Luminosity / Area )
I went to the source to find out the luminosity rating of the CREE XR-E LED used in the Roughneck. Based on official spec sheet by CREE, the LED with the highest flux output (Group R2, cool white) in this series can only produce 114 lumen of flux. So how can this Rayovac flashlight claim '200 lumen'?
In short: the Roughneck has zero power regulation. That means the CREE LED is driven directly by three AAA batteries. The LED current (hence power) is completely at the mercy of the battery voltage and internal resistance. When powered by three fresh Alkaline cells initially, the LED consumes over 1.5A current (or 6W power) - even though the CREE LED is only rated up to 1A maximum! Maybe this is how Rayovac can justify claim of '200 lumen', because the LED is being over-driven. The problem is that battery power is drained at an alarming rate, and the LED brightness drops immediately as the battery voltage starts falling. So the claim of '200 lumen' is completely meaningless.
In contrast, the MagLite 3-D Cell LED Flashlight maintains a constant power of 2W as long as the battery voltage is above 3.5V. This ensures a consistent light output and prolongs battery life. See my uploaded "LED Power vs. Battery Voltage" chart in Customer Images section for details.
The Roughneck has an electronic switch that operates in three modes:
- When the switch is pressed for the first time, the LED starts in Low power mode. In this mode, a 0.5 ohm resistor is inserted in series to the LED to limit its current and hence brightness.
- Second press brings the flashlight to High power mode, where the LED is connected directly to the batteries.
- Third press makes the LED blink rapidly.
- Forth press turns the flashlight off.
The problem is that there is no easy way to immediately turn on/off the LED. Having to cycle through High power and then blinking mode before off becomes tedious quickly. There is a trick (press down the button for over 2 sec) to skip the Blinking mode, but the LED needs to jump to High before off, so it is still annoying.
Don't believe the marketing hype that this Rayovac Roughneck is a '200 lumen' LED flashlight. It is still an acceptable unit - assuming you can get it for lower price than a Maglite XL50. Otherwise, just get the Maglite instead.
It comes in blister packaging that has to be destroyed to get to the flashlight so I will not be returning it. I have bought far better LED flashlights at a third the price for this one.
Most recent customer reviews
I won't but any more of these ever.
U seless out of box.
N ot working.
K icked it to the trash.