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Put on a pair of gloves. Then, using needle nose pliers grasp the battery and pull it out. If it's too far down to reach with needle nose, or if the corrosion has "welded" it to the inside of the flashlight, find a flat head screwdriver or stiff wire coat hanger or other tool/object that will reach and is stiff enough to pry the offending battery loose. Once it's broken free, turn it upside down and let the battery fall out on its own. The important thing now is, if you plan on using the flashlight again, cleaning out the inside thoroughly of all corrosive residue. This is particularly important on the metal battery/power contacts. A wire brush should suffice for the inside of the flashlight. Sand paper or file will work for the contacts. Attach to the tip of a screwdriver if you need to reach deep to get them clean. Baking soda will neutralize the battery acid. Finally, remember to recycle the offending battery not throw it out with the regular garbage.
If you remove the tail cap (the part that you unscrew to put the batteries in the flashlight) and the head assembly (the part that has the light bulb) you should be able to push the battery out. Wear some of those disposable latex gloves as that chemical that comes out of the batteries is very corrosive. Or at least wash your hands really well before touching anything, especially your eyes. Good luck.
Not sounding good. I have had the problem in the past with Mag lights and though they are good, I always seem to have battery corrosion problems.
What I have done is to get a non-metalic rod, wooden doweling has worked for me, carve a bit of a blade at the end, sort of like a long screw driver and work it into and between the batter and flashlight case. Not so hard as to deform the flashlight, but to try and break the seal between the corroded (I assume) battery and the case. Spray in some WD40 and work the dowel in and around the battery. Stop on occasion and tap the open end of the flashlight on a heavy rag laid atop a piece of wood to try and jar the battery loose.
By repeating this process I have been able to remove corroded batteries, but not necessarily save the flashlight, as some times the on/off switch is corroded as well.
Once you get the batteries out you may be able to clean the inside with some abrasive (steel wool?) to clean out the corrosion, but as I said, you may not be able to save the light.
Best of luck!
If you can remove both ends of the flashlight, find a piece of pipe that is slightly smaller in diameter than the inside of your flashlight, hold the flashlight body in one hand and the pipe in the other. place the pipe on top of the batteries then strike the pipe on a heavy hard surface that you are not worried about damaging. The blows should dislodge the batteries. Clean the corrosion thoroghly before putting new batteries in
Ok, problem is the acid has corroded and caused a white powder residue to form, you will have to spray a solvent into the torch to free the batteries... bad news? the corrosion cannot be fully cleared and the maglite will always be on the blink... sorry but i have tried several times for people and just cannot clear it out fiully
They are probable corroded. Try tapping on solid surface that you will not damage, a piece of 2x4 works well. If still wont come out take off top of mag and see why they are stuck. If corroded clean wil baking soda and water then rinse well and use a hair dryer to dry completely. You may have corrosion on all other parts to.
Corrosion in light caused by acid leakage from Alkaline batteries. Batteries may have exploded in light to remove batteries, I usually use a solution containing dial liquid soap and water. Going heavier with the soap and gently slide the solution into the light, cover it and sit it upwards, wait 24 hours then slide the alkaline batteries out. Not sure if light will still work afterwards but, hey at least you'll get those batteries out. ;)
The best way to fix your problem is to remove the light bulb and every thing with it on the light end of your light then you should be able to push the old batteries through the lights casing.(assuming you have unscrewed the cover off of the light) DO NOT DRILL IT the battery acid is very corrosive and you don't need any more of it out of them than has already leaked. thanks for choosing FIX YA!
If there's a lanyard hole in the cap find something that will fit in that hole for leverage. If not you might have to use some vice grip pliers or two of them. There is a possibility that the batteries have leaked inside the light and has corroded the threads.