Prepper Book Festival 8: The New 2000 Hour Flashlight

Avatar Gaye Levy  |  Updated: November 24, 2020
Prepper Book Festival 8: The New 2000 Hour Flashlight

What better way to start off the new “Prepper Book Festival” than with The New 2000 Hour Flashlight?

I say this because, from the get-go, I was part of the feedback team that Ron used to fine tune the technique in the first edition and get it ready for prime time. Although I don’t know for sure, my guess is that thousands of copies of the original “Flashlights” is out there and likewise, scores of prepper’s have used Ron’s technique to build their own survival flashlight with a usable beam and battery life of 2000+ hours.

New 2000 Hour Flashlight - Backdoor Survival

That brings me around to today.

As you may know, Eveready stopped producing the lantern style flashlight used in the original book. So, rather than leaving folks up a creek, Ron completely overhauled the book and rebranded it The NEW 2000-Hour Flashlight and all is good. In doing so, he expanded the type of flashlight that could be MacGyver’d so there are now lots of choices. One goes out of production? No big deal. There are others.

Back on topic, Ron has set aside three copies of the print version of The New 2000 Hour Flashlight for 3 lucky readers. He also told me he has some additional books up for grabs but he is holding me hostage for those until I send him some interview questions. Fair enough.

But I still want to offer you something today and so, with his permission, I share his chapter on batteries to give you a feel for some of the incredibly useful information in his book.

Batteries – An Excerpt from The NEW 2000-Hour Flashlight

The purist might object to the way I use the terms ‘battery’ and ‘cell’ in this manual. Technically speaking, a battery consists of multiple cells. I’m aware of the distinction but I’ve chosen to use the terms as they appear in everyday speech. Picture two kids squabbling on the sofa. Mom intervenes. “Fred! Give him back his flashlight cells.” Would anybody really say that?

D-cell test results

As regards to D-cell longevity, I tested Duracell, Energizer, and Rayovac side by side (all alkaline). The Duracell D-cell outlasted the other two by a fair margin.

NEW 2000 Hour Flashlight - Backdoor Survival

As regards to price, Sam’s Club had Duracell alkaline D-cells in a 10-pak for $12.40 including sales tax (and it was not an ‘on sale’ price). That’s $1.24 each. Less than any other store. Less than any other brand.

Duracell is thus the winner, providing the biggest bang for the buck amongst alkaline D-cells.

A little exposé

Although Duracell won the D-cell contest, when it comes to the big, square 6-volt batteries, different story. Typically, 6-volt batteries contain four F-cells. F-cells are the same diameter as D-cells but are longer.

A reader’s comment (in regard to the first edition of this book) tipped me off. He noted that Duracell 6-volt batteries contained not four F-cells but four D-cells. I couldn’t believe it! In my mind Duracell was the premier brand, $9 at Lowe’s; 50% more than the $6 Rayovac at Wal-Mart.

So I performed some surgery to get to the bottom of things.

NEW 2000 Hour Flashlight - Backdoor Survival

The Rayovac contains four F-cells.

NEW 2000 Hour Flashlight - Backdoor Survival

And here’s a Duracell with four D-cells inside.
Hey! Them cardboard spacers don’t come cheap, lemme tell ya.

A test showed that, whereas the Rayovac 6-volt gave 2000 hours of useful light (in the original 2000-hour flashlight), a Duracell 6-volt gave only 1100 hours.

Note that the 6-volt Duracell pictured above contains three Duracell Coppertops and one Duracell Procell. From my reading, Coppertops and Procells are interchangeable, built to the same spec. (And it would appear, judging by what I found inside the Duracell 6-volt, that they really are interchangeable. Duracell certainly thinks so.) Why does Duracell market two different brands made to the same spec? Dunno. I guess it’s just an example of corporate decision-making in action.

It’s also interesting that Duracell advertises a shelf life of ten years for their D-cells. But take those same D-cells and put them in a 6-volt case and, amazingly, the claimed shelf life shrinks to seven years.

NEW 2000 Hour Flashlight - Backdoor Survival

ABOVE Left: Ten-year shelf life
ABOVE Right: Seven-year shelf life.

But enough scandal mongering. To summarize our test results (in a comparison of Rayovac, Energizer, and Duracell batteries), amongst alkaline D-cells, Duracell is both the longest-lasting and carries the lowest price tag. Amongst alkaline 6-volt batteries, Rayovac is both the longest-lasting and carries the lowest price tag.


The Giveaway

Here is the part you have been waiting for because I know you are going to want to have a copy of the print version of this book. There will be THREE winners.

a Rafflecopter giveaway

The deadline is 6:00 PM Pacific next Tuesday with the winner notified by email and announced on the Rafflecopter in the article. Please note that the winner must claim their book within 48 hours or an alternate will be selected.

The Final Word

Ron and I have been pals for awhile and I both trust and respect his opinion on all things that have to do with emergency lighting, not the least of which is flashlight power. And you know that I have a thing about flashlights! You can never have too many.

Let us pull out all stops on this one and convince Ron we want more of the same! For more about Ron, be sure to visit his page here on Backdoor Survival at Meet Ron Brown.

Enjoy your next adventure through common sense and thoughtful preparation!

If you enjoyed this article, consider voting for Backdoor Survival daily at Top Prepper Websites! In addition, SUBSCRIBE to email updates and receive a free, downloadable copy of my e-book The Emergency Food Buyer’s Guide.

Spotlight: The NEW 2000-Hour Flashlight

The first edition of this book (“The AMAZING 2000-Hour Flashlight”) contained 54 illustrations. This edition (“The NEW 2000-Hour Flashlight”) contains 128 illustrations.

The first edition showed how to modify one flashlight, a specific Eveready model, such that it ran 2000 hours on one battery. Unfortunately, Eveready has replaced that particular light with newer models. This edition shows how to obtain extended run times using other brands – one of which runs 2200 hours, better than the original. (Incidentally, 2200 hours equates to three months of continuous running, night and day.) In general, the modifications or “hacks” are accomplished by adding a resistor (30 cents) to a flashlight.

Simplicity is the watchword. Wire glue (a glue containing carbon that conducts electricity) can be used in place of solder. Wire glue eliminates soldering and reduces the task from a techie project to Junior High School level.

What with floods, hurricanes, tornadoes, tsunamis, typhoons, earthquakes, blizzards, and downed power lines, there’s always a blackout somewhere. If people in general knew the information in this book, life would be a lot easier for a lot of folks.

Plus: The Preppers Guide to Food Storage

No list of books would be complete without my own book, The Prepper’s Guide to Food Storage. The eBook print version is available.

Help support Backdoor Survival. Purchases earn a small commission and for that I thank you!


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71 Responses to “Prepper Book Festival 8: The New 2000 Hour Flashlight”

  1. going to send this to my husband who has a battery obsession. Wonder if there is a technical or medical name for this.

  2. I have several Maglights, large police type and small. I also have a headlamp for
    hiking and walking. Two plug in emergency lights in different areas of the house
    for power outages.
    Can’t wait to make one of these flashlights!

  3. I have several manufactures of flashlights. My most recent purchase is one made by GoVolt. Purchased four, one for my wife to carry every day, one in each of my children’s school backpacks and one for my self. Over the last number of years the LED flashlights have improved to an amazing degree. The only ones I’ll buy now.

  4. I worked in the electronics store of a major chain and the only batteries that actually lasted in our demos were the Duracells, and those are the ones I’ve always used at home.

  5. I have a wide variety of flashlights that I’ve collected over the years. I do have a Faraday light but it’s a pain to keep moving it in order to continue to have a beam of light. I like the LED lanterns and lights, but fortunately I haven’t had to use them that often, so I’m still not sure of durability. As far as batteries are concerned, I use what’s on sale. Every now and then, Walgreens drug stores offers their store-brand batteries at buy-one, get-one pricing. I stock up then. I live in Florida, so I have learned the hard way to keep them in their original packaging until use! Otherwise they corrode.

  6. I prefer Maglights, but have more of a Harbor Freight, free with coupon budget! As long as they work and aren’t terribly cheap, I’m good. I really like the lantern types, especially for power outages to light a room.

  7. I want that book-Please! The luck of the Rafflecopter please be with me.
    As you said flashlights are so important. You get that sinking feeling when
    the power goes out and your fumbling about look for your light.

  8. In the interest of fair play (based on the excerpt that Gaye used here), it appears that neither Rayovac nor Energizer are babes in the wood when it comes to D-cell-6-volt games. I discovered this (of course) immediately AFTER pushing the “publish” button for “The NEW 2000-Hour Flashlight.” Ain’t that always the way?

    The Rayovac No. 808 6-volt battery uses four F-cells. The Rayovac No. 806 uses four D-cells. The batteries look identical. The only difference is the tiny model number on the side of the case. If you Google for Rayovac 806 and press “images,” you can find a couple of examples.

    For its part, Energizer makes the “4LR25” with four F-cells and the “4LR20” with four D-cells. At least this is what I read on the internet. I have not been able to get my hands on either a Rayovac 806 or an Energizer 4LR20 so that I can testify from first-hand knowledge. The 806 and the 4LR20 are reportedly sold in Canada, the UK, and Australia (outside the USA).

    The moral is, if you really want to survive, don’t put blind faith in anyone or anything. As they say in the world of stocks and bonds (and now flashlight batteries), DYODD. Do Your Own Due Diligence.

  9. We have mostly MagLight brand. Like the weight and durability. A few other brands and two hand crank styles. We have one in every single room including outbuildings and cars. I have found its best to have one always within easy reach.

  10. I don’t have a favorite flashight. I keep buying them and I’m not sure what DaHubs does with ’em but after awhile they stop working Yes even after I’ve put fresh batteries in them. I keep going back to the rechargable stick light I got him one Christmas, MMMM,I guess that makes it my favorite one after all lol. That one stays on top the fridge(OR ELSE). I have tons of those key chain lights(given away at home shows, etc) I hope I win that book, I would love to see if I can get my light to last a looong time 🙂

  11. Thanks for the battery information. A possible third alternative is NIMH rechargeable D cell in a carrier for 6 volt lantern use. Reuse the Duracell end caps or spend a couple of $ for a purpose built carrier.

  12. I too favor maglites for their durability but they do go through batteries. I am investing in a couple of the block lites for 9 volt and am looking for other LED types of lights.
    I have 2 of the 6volt batteries and 1 lantern/flashlight and would really like to learn about how to extend the battery life in it so if I don’t win one of the books I guess I will just have to buy one.

  13. Mag Lights for sure. I bought 5 or so of the led ones from Prepared Essentials that go for $20 when they were on sale, love them.

  14. I’ve run tests on alkaline batteries and also found the copper top lasts the longest. I also have the alkaline recharger that Gaye spoke about here some time ago and the copper tops all keep coming back to usable power and the bunny and others just poop out.

    I have the original book and the updated one would be a good addition to the collection.

    On the MagLite, I have a large 5-D-cell – copper tops of course in there – and got the LED conversion for it. Hit the neighbor a quarter mile away across the ranch land and about blinded him.

  15. I have always liked crank powered flashlights since they don’t have batteries that need to be regularly replaced.

  16. We have a maglight that we use around the farm. I have a tiny little LED flashlight that fits into my coat pocket.

  17. I have flashlights and a spot light from Dorcy Direct that I trust. That said, I am amazed how nice my shakeable (no batteries) flashlight has worked the last few years. It was only a few dollars at Walgreens!

  18. The flashlight that’s currently my favorite is the solar rechargable types. But it depends on the situation, I also use an led headlight that uses 3 AA cells for when I go outside at night.

  19. I have all kinds of flashlights and don’t have a favorite. I use rechargeable batteries exclusively so I can use my solar battery recharger and never run out.

  20. This looks like something that could give a person a peace of mind. The flashlight I have right now you have to use too much energy because it requires you to shake it forever!!!!

  21. The flashlight that I like the best is a solar powered flashlight, We’ve had some for 5 years now. They have a battery but it is holding strong.I also like the 2ooo hr. light.

  22. Thanks for the opportunity to win the book. I have a small task light that fits in a secret compartment in my purse. It takes 1 AA and lasts a long time. I also have a solar battery charger and rechargeable batteries. I also have a larger flashlight that is still small by most standards. It clips to my BOB. It also takes AA batteries. I have tried to standardize on a couple battery sizes to simplify stocking and recharging batteries. I think my Kaito radio also takes AA if I wanted to put batteries in it instead of cranking or solar charging.

  23. My husband has the flashlight addiction and he would say his favorite is a maglight. I like those inexpensive mini cree lights. They are light, small and bright.

  24. Would love this little book! Always dealing with dead flashlights. Have also found Duracells to be the best (get on sale at Costco), but wonder if the author checked out Costco’s Kirland batteries which are priced well… Wonder who makes them for Costco and if they are as good as Duracells….

  25. Maglite for weight and reliability. Have backups plus batteries and solar charger in our makeshift Faraday cage.

  26. I do not have a favorite, but I do have a flashlight obsession/addiction! I don’t think you can have too many flashlights or too many different kinds.

  27. I had to go check – I have an Energizer flashlight. I like to read and when the electricity has gone out, I have resorted to flashlight. Battery life can be a real problem. 🙁

  28. my favorite is unequivocally the crank up kind. my kids are bonkers about flashlights and look for any excuse to ‘need’ to use one and I got so sick of burning through batteries and constantly harping at them to shut them off. not the brightest for sure but I don’t care.

  29. ok need to clarify….my previous comment about not being the brightest was referring to the flashlight….not myself or my kids LOL!

  30. I’m learning something every day. I like the set up for the 2000 hour flash-light. Going to make life easier.

  31. I don’t have a favorite brand. I have a wide variety of cheap and good flashlights and always put the really good ones on my Christmas list for my family to buy for me. I have been very interested in the 2000-hour flashlight so this is a great giveaway!

  32. I also have no favorite brand of flashlight but my favorite type has to be LED flashlights. Granted, they are much smaller than regular flashlights and do not present a very workable modification area to turn them into the 2000 hour giants, their size and light quality are what draws me to them. Now, show me an affordable 6 volt monster in LED format that a similar modification will work on and I will be one of your happiest salespersons!

  33. Some wonderful lady put me onto a little block light that fits on the end of a 9 volt battery. These are my light of choice. They are just like reading glasses, I have them scattered all over the house.

  34. It has been my experience that the Ray O Vac batteries will tend to leak before they even go bad. Have had several flashlights ruined before I stopped using them.

  35. Can’t tell you exactly how many flashlights we have…been collecting them most of my adult life…I probably have 5 or six just in the pickup truck! And as long as I don’t let the batteries leak into them, they keep lighting up our life.

    Must say…I’m a little miffed about the 6V battery comparison…please take your brightest light and shine it on that 4-D-cell vs. 4-F-cell scandal! And thanks for the heads-up!

    Thanks for all you do.

  36. Since I have salvaged and modified so many flashlights it can be daunting to pick a favorite, but I must say the most used daily is the “Pal-light Safe light” and when more power is needed the “Duracell Daylite”. Both are led, the Pal-light requires a 9 volt battery, and the Duracell requires 2 cr123 batteries. I have rechargeable batteries for both with various moods of recharging.

  37. No favorite flashlight, but for the last year or so I’ve been carrying a AA powered pocket clip light with me everywhere. My wife harassed me at first for doing it, but I’ve since had need for it a few times, and so has she. I don’t leave home without it!

  38. I do not have a favorite type of flashlight or battery, because I have always assumed they are all the same. Now that I have seen some proof that they are not, I will have to do a little investigating of my own.

  39. My GF RustH won this book for me. The book is not very thick which is misleading, because the information inside is pretty cool, easy to understand, AND the mods are easy! After reading the book I chose the Dorcy lantern because of its ‘brightness’, and installed the suggested LED bulb. I have not modified the Dorcy lantern as of yet, and I may not. Instead I purchased 2 of the Rayovac adapters and modified those. I like the fact I can use a modified adapter in just about any 6V lantern. The hack on these adapters was easy thanks to the instructions and the illustrations contained in the book. The ‘hack’ works as advertised! Thanks for writing this book and giving folks some very cool prepping info! 🙂

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