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I changed the batteries in my 3d defiant flashlight , put the end cap on, it only lights up when cap is just barely on. Been looking for the company for info but can't find defiant anywhere.

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If the batteries fit into a holder, you may have installed it upside down.

Posted on Dec 18, 2016


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1 Answer

How do you change the batteries in a 3D cell Great Lite flashlight

You just unscrew the cap at the end of the flashlight. You will also find a spare bulb in the cap.

Surprised you would buy one of these when LED flashlights are 5 times brighter and the LED lasts forever. Take a look at this one.


Sep 13, 2016 | Electrical Supplies

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Replace batteries

Marcia Boal... hello,

If our battery has corroded it may be impossible to get the end (opposite the light) cap to come off. The light is designed to be moisture resistant... Likewise even penetrating oil cannot get in...

To guarantee long reliable service it is best to put a tiny dot of grease on the threads on assembly.

Maglite Solitaire makes a wonderful little flashlight...
(all metal construction... single AAA battery)...
((Mini = 2 AAA batteries... opens the same)).

Basic colors included black, red, silver & blue
but this particular light was also quite popular for commercialization... often displaying many BIG NAME

The initial closure of the end cap can be quite loose to be effective because of it's O-ring design... however some folks put the end cap on too tight...


It might take some serious force to get it open again.

Consider using a piece of leather in a pair of pliers to avoid marring the case. Reassemble without over-tightening.

Hope this helps!

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Aug 19, 2016 | Camping, Backpacking & Hiking

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Not sure which bit to unscrew when trying change battery in onyx50

The flashlight uses 1 AA battery. My guess, you should only have to unscrew the end cap. If you finds it very hard to unscrew the end cap off, it could be from the battery has explode and swollen. MAYBE - I see this happen in my daughters MAG flashlight. DO not keep your flashlight in the car with the batteries installed. The amount of heat in the cars can ruin the batteries in the flashlight.

Apr 06, 2016 | Gerber 22-80144 Onyx 50 Flashlight

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How do you open a Coleman flashlight

You need to specify the model of the flashlight. However, for most of them you simply unscrew the bulb head or the battery end cap, empty the old batteries and insert the new ones with the positive end of the batteries always pointing toward the bulb end and the negative end of the batteries toward the spring in the end cap.. Be sure to discard the batteries properly. Contact your local trash disposal company to determine where and how to dispose of them.

Jan 02, 2015 | Camping, Backpacking & Hiking

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Model 7000 slide not working

I have a Defiant 7000 flashlight and took a look. When the light is closed, the top of the battery door (1) is right at the lip (2) that keeps the light from over extending. I couldn't get mine to close with the cover loose, but if you did you could carefully drill a hole (3) in the outer casing to see and push the battery door back into place. You could also remove the two philips screws under the rotating magnets on the base and maybe push hard enough to force the top out?

Feb 22, 2014 | Defiant Camping, Backpacking & Hiking

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Defiant headlamp; where's the tab to be removed?

If you are talking about a shipping tab that prevents the batteries from discharging during shipping, look inside the battery compartment.

There should be a plastic, or cardboard tab, that prevents one of the battery ends from make contact with the flashlight. Just pull the tab to remove it.

Mar 24, 2013 | Defiant Headlamps, Lanterns & Spotlights:...

1 Answer

What is the alignment of the batteries in a 3d cell?

put the first one in positive side toward the light,, and the rest go in the same way, make sure the spring is attached to the base and screw it on, the positive side of the battery is the side with the bump on the end,, if it doesn't work after that ,, in the end cap of the flashlight you should have a extra bulb,, replace that and try it ,, be sure to put the spring back on the end cap

Aug 26, 2011 | MagLite Mag Instrument Mag Lite 2 "D"...

1 Answer

How do I change the batteries in a AA maglite?

Remove the end cap by turning counter-clockwise and pulling cap off. It may be a pretty tight fit so you can wrap a rag around base cap and use pliers to loosen. Use rag or duct tape to protect finish on your light end cap. The threads are very fine so after you have removed end cap and replaced batteries be careful not to cross thread when reinstalling end cap. I hope this helps you. Thanks.

Dec 17, 2010 | MagLite Mag-Lite& Flashlight

2 Answers

Removal of end cap

Most likley cause is that the batteries in the flashlight have leaked and has caused the threads on the end cap and flashlight to become fused. If at all possible, try to stand the end of the flashlight in a small plastic container with some PB Blaster, or other decent penetraiting oil, (WD-40 doesn't do very well in this situation).

After letting it soak overnight a good 24 hours, put the body of the flashlight into a vice, preferably with rubber or plastic jaws/protectors to keep from galling up the body of the light. Use a good sized pipe wrench to lossen the end cap and spray some penetrating oil onto the threads as you expose more, until loose. You will mark up the end cap, but you'll get it off. Once off, remove the batteries and use some baking soda to neutralize the battery acid. Rinse with water to clean and let dry. Remove any obstructions inside the battery tube with a wooden chopstick, or end of a wooden spoon (so as not to gouge or damage the aluminum tube) Get as much of this crude out and wipe dry.

You should be able to freely insert and remove the batteries, if not, keep cleaning the crude until the batteries go in and out easily.

Last ditch approach is to return the light to Maglight for them to repair and service. They'll return the light to you just like new, but there will be a charge for their service. Just check their web site for repair details.

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