Damn dude. You teach, really, what needs to be known. Even I didn’t know that 18650 is the literal measurement of the battery. And I’ve been using them for years now

Thanks for this basic info. People often forget when learning something new that you need need to start with basics.

I have 16 Orbtronic 18650 (Panasonic cells) protected batteries for my various flashlights, and have been very pleased with them. The oldest among them being over 8 years and still going strong. I label mine A to P with a P-Touch labeler for easy I.D. I cant stress enough the importance of a quality smart charger, especially with auto discharge and ability to give a readout of the cells health/actual mAh capacity. Thanks for your comprehensive video in minimal time..

Clear,concise and educational - a must watch for the novice.

Such an important video for anyone utilizing these cells, I see tons of vapers with zero knowledge of batteries who will continue to run them with rips in the wraps. This is among the many reasons we have venting and explosion horror stories in the media. This should be required viewing.

Thank you for informing us without a long intro, corny jokes and no loud KZfaqr-tone of talking. And no useless sponsor mentioning.

Thanks for taking time to explain very use full for years to come

Very good and well detailed video. Great information. Thank you just what I need

OUTSTANDING commentary and educational. I enjoy your webcast. 🔦🐢🔦🐢🔦🐢

You the man. Thanks for the information as always. Just wanted to say o purchased an olight seeker pro 2 after watching your reviews. I tell people at my job that you are the man when it comes to flashlights

Thanks for this video sir! Made it really easy to follow.

A good introduction, with something for both novices and experienced users. Most of my experience with rechargeable cells comes from the NiCad cell days. I remember learning to "zap" them to vaporize the metal whiskers to which they were prone. Good times!

Excellent video! Thank you for all the info!

great presentation love this guy thanks for all the info

This was SO helpful, thanks!

Thank you Very much for your time making this great Video !!!

Excellent and very helpful video & information. Thanks

I appreciate the video brother, and the recommendations as well. Very good info, thanks.

Really nice and honest review

Great presentation! Thanks!

Did a right-fine job on this video, son. You might want to include the fact that, while rechargeable batteries are a good replacement in most devices, there will be quite a few instances where you really NEED that initial 5.8v-to-6v (4 X 1.5v cell) for the device to work, as a voltage of less than say 5.6v-to-6v (4 X 1.2v = 4.8v) just may not even turn the device on. In the last few years, there HAVE been rechargeable batteries that produce the same voltage as their alkaline counterparts, but for the most part, the voltage of the most popular Ni-Cads or Ni-MH are the 1.2v variety.

Thanks for the tutorial. Awesome information!🙂👍👍👍

Excellent and informative video, thanks for sharing. 👍🏻

Bravo Matt. Great job!

You're definitely a great help for me thank you so much for showing this I bought the mini pro it didn't come with a charger so it looks like I'm going to have to get a charger for it

Super helpful video. Thanks

Great vid. Brilliant advice. Ty.

Very informative! Thanks!

Thanks dude you save me a lot of money and time

Thanks, great video.

Fantastic video man...

Well done! Thanks really helped me.

There is a lithium ion rechargeable AA battery (1.5 volt) which I bought recently. Made by Hixon. The only problem is that because of the protection circuitry, the AM band is not listenable on portable radios. They're rated at 2333 mah. (3500 mwh).

Now that was kinda enlighting. Thx

i subbed and thank you for explaining i wish you made another lesson video it really helps me learn

Your video is very informative thank you...

Thanks for great information. 👍

Nice intro video for someone getting into the hobby.

Good info, thanks!

Thanks Matt! I’m just getting into flashlights and I’m learning about all this battery stuff. Who knew?!?! I just bought my first two REAL flashlights (Thorfire Q8 and an Astrolux FT03) and ordered samsung INR18650-30Q 15A 3000mAh 18650 batteries. I read after purchasing them that they will not be ideal for the Q8, and that a 20A battery will let you get to the flashlights maximum output. Will there be a big noticeable difference between what I bought and the 20a? I also purchased a Nitecore i4 charger. This is a lot to learn! I haven’t received my batteries yet but I will research how to charge and take care of them. For now though I’m curious about the 15a and 20a difference

Helped me a lot thx

This guy knows his shit. Very informative!

ive been using tenergy standard D batteries (the blue ones) since 2007... theyve been overcharged, overheated i dont know how many times, discharged until completely dead over & over, the bottom ends dented in because i dropped my maglite too many times... they still work awesome after about 13 years... they are not low self discharge (they didnt have that for D's then)... so i just got a bunch of tenergy centura D's & so far they are good... i like the LSD NIMH, because you stash the flashlight & when SHTF, they are ready to use a year later, low maintanence

Wow. Good info. Any commentary on Orbtronic batteries?

Great info.

Matt, really enjoying the knowledge drops! Have you used Orbtronic batteries? Thoughts?

I will have to try the immedion

Thanks man good to know :)

Try XTAR VP4 or Dragon Charger is the BOMB!!!

Great video, I also use the Efest and Keeppower, but also use Panasonic, Samsung, and LG. Most of mine are unprotected I'm not a big fan of the protected batteries I have over 70 li-ion batteries and about the same number of flashlights. I get mine from Obtronics, IMR, Gear best, and even some from eBay and Amazon. I checked mine with opus bt 3000 v2.2 charger to verify their authentic. When I first started using these batteries like everyone else I went the cheap route and bought ultrafire 4000 mah when I put those in the charger they show about 300 or 400 mah.

Oh and great vid.

Hey Matt, I love your videos. How can I get in touch with you about modifying a convoy flashlight that I have?

Hey buddy, love your channel. Had a question for you, what does AAA and AAA battery do you recommend? I just got a couple Olight flashlights and a couple other ones and they take either Triple-A or double-a and some of them take cr123 which brand name do you find to be the best in your technical opinion? Let me know when you get this body appreciate it long time since driver take care and be safe

Hi Matt, love your videos and your enthusiasm! Can I replace a16 340 1300 milliamp hour 3.7 volt cheap Chinese battery with a comparable better battery preferably lithium. To be honest I don't know if this thing is lithium or not.

What do you recommend for the Nitecore TM28? Their Nitecore IMR 3100 discharges to fast. I want safe but long reliable 18650s.

Great video, much appreciated. Also your other videos in general. I love flashlights, but noone else around me does. I just purchased a 2000 lumen bulb for my Maglite 5/6 D cell (I have an extension). Which rechargeable Lithium batteries will work for this? Is there any special way to set it all up? I can't find a specific video on your channel about this. Kind regards Thomas from Denmark

Hlo bro my bright light led battery about 6" total size cell missing please tell me how can I find voltage rating of battery for my torch

Lithium battery tortch or li -on battery is good... Pls answer

thank you

question, so when charging a 14500 what rate should it be at? 500 mAh? I know for an 18650 the optimal is 1.5 amp but I don't know what it is for a 14500?

What do you think about the EBL batteries D cell Matt?

hi matt can you use vaping 18650 high drain in torches that are 35A? got some samsung 25R but dont know if they will do the job

Hey Matt, I've got a Thrunite V6 catapult and have had issue's with the batteries going "bad", I think they go into protect mode, when the light gets dropped on its face from a couple feet onto hard surfaces. Happened to me first drop on 2 flashlights now. The 1st one I had Thrunite cover it and got a replacement light. This time it is right at the 1 yr mark so... yeah. I see a lot of different batteries out there that are cheaper than a Thrunite brand one, I haven't had good luck with their batteries, so was looking for something else to use. Was wondering what you would recommend me doing as I know you have far more flashlight knowledge than just about anyone on youtube. Watch your videos all the time. Thrunite can credit you with a V6 sale. Lol. Great light, love it. Battery not so much... thanks for your time.

I have a cheapy menards Guidesman 5w flashlight. I like it because if the flood and spot capabilities. Its bright. I look for addresses for work with the spot. Three questions. Can i get a different battery or two, replacing the 6 aaa batteries it takes? If not is there a better aaa battery than the EBL Nmh 1.2 v 1100 mAh? It seems it doesnt hold the charge all that long. And Last Is there a better slim profile not so long flashlight with spot to flood capabilities? My guidesman is just a bit annoying with putting in my pockets because the bezzel or head of the flashlight is wider and bulky, its a bit uncomfortable when sitting so it comes out of my pocket. Need something less in length (6 inches i belive its at) Thanks.

I have a Acebeam K70 I’m wondering what battery you would run in it?!

I use XTAR Protected 26650's in my 2D mags with the 5000 lumen dropin. Ive also just converted an ML150 to accept a paiur of 26650's rather than the lower voltage LifePO4 pack that comes in it.

Wow! Very informative vid. Thanks. What do you think about "Bangood" as a battery supplier?

Can I use a D size lithium ion battery in a flashlight conversion or do you recommend the 2-Pack (Card) Tenergy Centura NiMH D 1.2V 8000mAh Rechargeable Batteries as you mentioned in the video? Also do you recommend a nice bright LED? If so do you have a recommendation for an old 2 D battery conversion to lithium ion or the NiMH battery you mentioned in the video? Thank you😊

Been wondering what charger I'd need for a 18650, need a battery or 2 and battery but not sure where to buy or what to get

Thank You

What 26650 battery do you recommend for best performance in a cup 90 Thank you!

Where do I buy 14500 batteries for my N1 AA flashlight? And which charger would you recommend? Thanks!

Any 18650 that claims to be more than 3400mah is most likely lying there is a limit to the power to size factor.

So are Panasonic/Sanyo NCR batteries basically ICRs, or similar to that? Can’t seem to figure that out.

Matt, thanks for the video. Do you recommend high amp ratings or low amp ratings for flashlights. lots of videos on vap mods gets a bit confusing. Not sure if it applies to lights. thanks

Looking for Rechargeable CR2 batteries and CR123A batteries for Duty use in a Carbine (Red dot sight) and handgun mounted weapon light. Looking for high mAh, recently bought some Ultrafire brand rechargeable CR2 batteries and CR123A batteries, are these any good? Do you have any recommendations for high mAh rechargeable CR2 and CR123A batteries?

I got a new 2022 flashlight that ce with a 26700 3.7v battery. Can I use a 18650 3.7v battery in it as a backup? Can I charge the 18650 in the new flashlight? Thank you!

Hi Matt, i still have a few Inova flashlights, old but well built and durable, i.e., inova x 5 and x 0. they run on cr123 batteries, expensive and non rechargeable. Is there any battery I can use to replace them? If there is, will they fit in my flashlights?

Should I use nihm batteries of same rating and sizes but different brands, eg 800 gb and energizer

Hi , just bought a pair of Shockli 26650 's . Could you please tell me where and what kind of Charger I should buy ? Thank you , Sir , Much appreciated !!

So if I have a flashlight that takes two CRI 23 batteries I can replace them with two AA batteries ?

Matt, I've got a Rovyvon E700u angel eyes that loses charge over a few days. It uses a 21700 Fenix 5000 mah battery. You have any insight to my problem?

i always use duracel batteries for my maglite flashlights also The d cel maglites

I have to say that in 2014,I purchased a flashlight that came with 2 ultra fires and a charger. I charged them when I received them.Used the flashlight a few times before storing it in my glove compartment..2 months ago.(2020) I remembered the light was in there and KNEW it would be discharged.., Man the thing lit up like the sun and is still working for me with about once a week uses ..Charged in 2014..lol

I have an led torch using a flat topped 26650 battery and it’s went dead. What can I do to revive it? Would it be safe to do the drill battery trick with two forks?

I have a flashlight. It was one of those retail store flashlights, like you might find close to the checkout counter. It came with a battery adapter, that holds four AAA batteries. I suspect that the adapter is a stand-in for some type of lithium battery, but I'm not sure what type the flashlight is really expecting. It's the standard "Tactical" configuration, that seems to be everywhere & sold under countless brand names. I'm tired of getting alkaline replacements for it, and if there is a legitimate rechargeable alternative, I'd like to find it.

I have a flashlight with 6 AA battery what would be a good alternative

Hi i have got samsung 30q 18650 batteries 3.7v batteries and i have been having problems with them the first one i bought stopped being recognised by the charger and now i have one that when fully charged only reads 3.3 volts. They do get left in my torch over the summer unused is this causing the problem do you think?

Hey Matt, we need to know who the reputable battery dealers are. Can you suggest a few?

I bought 2 18650 cells that are supposedly used in e-ciggarettes and they say SE US18650VTC4 C4 G 1440289XE08K

This guy's cool...oh yeah, I've fallen for buying cheap 18650 batteries on ebay. I've never used them. I didn't know better at the time, but now that I do, I'm too nervous to try them.

I was charging 18650 cells with my phone charger and checking voltage often. I had 4 batteries and a roommate had about 100 he borrowed one and brought me a different battery. I started charging 5v 500 ma. Within a few minutes it started heating up so I took it off charging. About 2 minutes later it was shooting fire out the negative end. It flew and hovered spouting flame and gray residue. It lasted for a few seconds and Yoda was trying to get out of the room ( my 16 yr old Chihuahua). I never let anyone bring me a battery even though I was charging it on a homemade rig I never had a problem like that again .

My question is if I get a light that takes 16340 can I use a cr123 instead?

Help!! I have a nicron n7 AA. It is supposed to take a 14500. I bought a klarus 800mah 14gt-80our and it will not work I fully charged it. I put it in a mag light and it popped the old buld immediately.. so its working..just not in the n7???

I recently found that Samsung 18650 are not bad and price is not that high, starting around $45 for 10pcs. Rated capacity is real and produced currents are not little. I also have a couple of UltraFire 18650's and they do not have even a half of capacity written on them (5000mAh): feels like it was multiplied by 5 and they weight much less than Samsung ones i have. Saw a battery test on Project Farm channel, there were some cheap as well as expensive batteries. If you have any real experience with other brands, you're welcome to share, this would be useful for us!

That's ok to use 14500 3.7 800mah lion,and normal 1 AA battery in bushnell flisglit won't damage the battery.or (bushnell 2 AA batteries flashlight.ok to and use in this one one cheese and one EBL 14500 .3.7 lion)thanks

Great review, but i disagree thats its simple - would be nice if the industry standardized it nomenclature. Having the same name for two different batteries makes it tough to remember what it is you have. I got so much tech to mange in my life already. But i have given up on leaky alkalines got tired of destroyed devices that i have forgotten in a draw somewhere LSD cells are my go to (imedions have been working great) . thanks for great info and simplifying it for me a bit . Went to the battery checker site - wow does he have a lot of info - Chargers too !

I got an LED torch and using my LI Ion AAA cells, the LED got really warm, then started to flash (presume that's a safety feature) Yet both say 1.5 volts Why does it get hot?

I have a Sanford SF438SL-2SC torch Just the head I don't know which battery to use The manufacture I found saying 1900 mah 3.6 v ni-cad battery I can't find it or even online buy it Which li-ion battery can replace it

Do you still prefer the batteries mentioned in the video? I need to buy a few dozen 18650s and a few decent chargers.