iFixit - Active Questions With Device "Flashlight"

Flashlight: Tactical flashlight won't work with new batteries. Emitter, driver?

Tue, 03 Feb 2026 13:13:15 -0700

I have four Pro-4 tactical flashlights (two large, two small) that worked well for at least five years. Now they're dead and new batteries aren't the fix. Interiorly, in each, it's clear the emitter is (securely) wired to a driver. How do I determine what component has failed? Are the components replaceable? These flashlight are heavy, milled aluminum worth much more than their original ticket...it seems unthinkable to toss them.

I might add that, sadly, the small emitters weren't designed for easy replacement as they appear to be a permanent part of of a design-specific aluminum ring.

How might I proceed? Happy to provide flashlight ID, disassembly, and repair pics when/if pertinent. I can do basic soldering and my fixit persistence is a local legend.

I found the Pro-4 flashlights at Sam's back in the day. One can find them used on eBay, but it appears they're no longer manufactured. The original promotional copy included:

The Pro-4 Tactical Flashlight with COB Lantern is up to 40 times brighter than ordinary flashlights. It features, aircraft-grade aluminum construction, zoom-in and zoom-out functionality, and five light modes. It provides bright, reliable light in nearly any situation. Use for home, work, outdoors, and emergencies. The Pro-4 Tactical Flashlight with COB Lantern is one of the most powerful flashlights of its size on the market.

Manufacturer SKU:4974

Runnings SKU:70310076

Up to 200 Lumens
Bulb: T6
Batteries: 3 AAA Alkaline Batteries (included)
5 Modes – High, Low, Strobe, Lantern, Red Flashing
Zoom Function: Spot to Flood
Retractable Wrist Strap
Aluminum Construction
Built-In COB Lantern
Magnetic Base
Weight: 129 grams (without batteries)
Size: 7.1” L Open; 6.6” L Closed x 1.42” Top D x 1.2” Bottom D
Water/Shock Resistant
1 Year – No Questions Asked Warranty

⟐ Commented February 03, 2026 at 13:13 MST

Mini Maglite AA: How do I remove corroded batteries?

Thu, 11 Dec 2025 22:47:01 -0700

The batteries are very corroded. So much that I have not been able to unscrew the end piece at the led end of the body.

⟐ Answer accepted December 11, 2025 at 22:47 MST

Maglite Solitaire: Trouble opening ro replace battery

Mon, 13 Oct 2025 14:27:24 -0700

I am trying to open the bottom to replace the battery but it won't budge. Any suggestions?

⟐ Commented October 13, 2025 at 14:27 MST

Flashlight: How to get at an end button switch

Sat, 25 Jan 2025 16:54:46 -0700

Some time ago I got a Qbeam 3 C-cell flashlight to keep in our Explorer. It was very rarely used, but the other day I noticed it was on just sitting in its spot in the rear pocket of the driver's seat. It looked like low beam, but the batteries were down only a little. On unscrewing the base I found corrosion just inside the tube and around the base's edge threads, and an apparent thin copper foil boot over the base's spring wasn't green but was in pieces. I cleaned out the corrosion and will treat the corroded areas with DeOxit, but in testing continuity on the base, I find that no matter the switch button position there is continuity between the spring and the base's aluminum threads. With fresh batteries the light will not switch off, and apppears to be stuck on low beam.

Any idea how to disassemble the base to see if it's repairable? There is a plastic plug in the base, surrounding the spring, with two holes in it such as some devices you can unscrew with snap ring pliers, but I can't get that plug to budge. I’ve tried PB Blaster penetrating fluid around the edges of the plug… assuming it does screw into the base, and drilled the two holes deeper to accept plier prongs better, but the plastic plug still won’t turn.

It was an expensive flashlight, seems well built, and was once sold mainly by Home Depot I think, but the manufacturer may not exist anymore. Apparently the inner aluminum threads have swollen enough from corrosion to make the plug immovable?

⟐ Answer edited January 25, 2025 at 16:54 MST

Maglite Solitaire: Is it possible to repair the twist-switch on the Maglite Solitaire?

Wed, 02 Oct 2024 02:40:59 -0700

Even when it is the 'twist-on' position, the flashlight keeps flickering and switching off by itself. Is there a way to repair this?

⟐ Commented October 02, 2024 at 2:40 MST

Flashlight: How to remove dead batteries from flashlights?

Sun, 29 Sep 2024 04:15:50 -0700

Does anyone know how to get dead batteries out of flashlights when the batteries have swollen up and wont slide out on their own?

⟐ Answered September 29, 2024 at 4:15 MST

Mini Maglite LED AA: My torch light is not on when we on the botten

Thu, 15 Aug 2024 16:04:12 -0700

My torch light is not on when we on botten

⟐ Answered August 15, 2024 at 16:04 MST

HexBright FLEX LED Flashlight: What is the problem in start

Tue, 30 Apr 2024 10:58:11 -0700

Head light problem solution for excavator

⟐ Answer accepted April 30, 2024 at 10:58 MST

Flashlight: when adding batteries to flashlight doesn't work why?

Thu, 11 Jan 2024 03:44:43 -0700

when adding new batteries to my flash light it doesn't work at all how can i fix this problem ?

⟐ Commented January 11, 2024 at 3:44 MST

Wiha 41286 Flashlight: DOA, cannot open the chassis of the flashlight

Tue, 19 Sep 2023 20:01:45 -0700

I would like to know if someone can guide me through the opening open the flashlight's main body. I think that something came loose during transportation and cannot ship it back because it part of larger set. The flashlight's body seems as whole, dye cast, pressurized to assemply, alluminium. I really don't want to cast aside a $100 flashlight. If someone had a similar issue and could eventually fix it please post the know how.

⟐ Commented September 19, 2023 at 20:01 MST

Maglite Solitaire: Can the bulb be replaced with a new one

Fri, 01 Sep 2023 14:04:17 -0700

Is it possible to replace the bulb, my one still works but it is not very bright even with a new battery

⟐ Answer edited September 01, 2023 at 14:04 MST

Flashlight: My on/off 3 mode switch broke off inside my rayovac metal rechargeabl

Thu, 05 Jan 2023 16:46:08 -0700

My on/off 3 mode rechargeable metal flashlight switch broke off inside the flashlight. I need a replacement switch.

⟐ Commented January 05, 2023 at 16:46 MST

Flashlight: How is the wire connected to this rechargeable battery?

Tue, 27 Sep 2022 04:41:30 -0700

Can anyone please let me know if the wire is soldered to the battery in the pictures attached below. If it is not soldered then how is it connected? I would like to know how to remove and replace this 3.7v 1200mah rechargeable battery of my flashlight.

Thank you very much!

⟐ Answer edited September 27, 2022 at 4:41 MST

Flashlight: Where can I get a new bulb

Thu, 02 Jun 2022 17:33:11 -0700

i have a ledlenser f1 torch the bulb on it has been broken where can i get a new one?

⟐ Answer edited June 02, 2022 at 17:33 MST

Flashlight: Bushnell flash 1000 ma light power port is bad

Thu, 21 Oct 2021 23:54:13 -0700

My Bushnell flash 1000 ma light power port is bad does anybody know if it is fixable?

⟐ Edited by author October 21, 2021 at 23:54 MST

Flashlight: Is it possible to fix a Core Equipment 1250 multi color flashlight?

Sun, 01 Aug 2021 12:17:33 -0700

I have a Core Equipment 1250 Lumen Multi-Color Flashlight. It takes 9 batteries (which I changed, just to rule that out). It will stay lit, but only if you continue to hold the button on the side. I can cycle through each mode, with the same results. The only end that unscrews (that I have this far found) is the end to install the batteries. The remaining body of the flashlight appears to be a single piece (aside from the button). Help!

Mini Maglite LED AA: Why does my light go bright then dim and Bright then dim?

Sat, 03 Apr 2021 06:44:57 -0700

I want my to stop flickering bright ,dim ,bright, why? I just want it to work right.

⟐ Commented April 03, 2021 at 6:44 MST

Flashlight: How to fix the worklight part of the Nebo SLYDE Z?

Mon, 04 Mar 2024 11:58:46 -0700

The old SLYDE Z has a worklight that comes on when you slide out that portion. Mine used to come on if I hit it hard in a perfect place, but now it doesnt, I have a request in to Nebo now, it is 6 to 9 years old.

⟐ Edited March 04, 2024 at 11:58 MST

HexBright FLEX LED Flashlight: Do you fix Eveready flashlights?

Sun, 06 Dec 2020 14:53:03 -0700

Do you fix Eveready flashlights?

Mini Maglite AA: batterey replacement fir my Mini Maglite AA

Wed, 16 Sep 2020 06:08:53 -0700

I did what you said but when I removed the disc there is another

black plastic device that looks like it has to come out the other end because there is a lip holding it in place

⟐ Answered September 16, 2020 at 6:08 MST