9V battery to Rechargeable 14500 Li-ion battery hack: Never buy 9V battery again

9V batteries are hands down the most expensive batteries out there. Replace it with 14500 Li-ion batteries and you'll never have to buy 9V batteries again.

[@JohnClulow]

Does the 14500 mod you described have any significant advantages over the rechargeable Li-ion 9VDC batteries offered on Amazon in a std 9V case?

[@vuaeco]

Definitely a yes. The 14500 mod is cheaper, has much more capacity, and doesn't have a BMS which is an advantage (or disadvantage depending on how you look at it-but for me it is an advantage). This is a great question. I will probably make a separate video about this.

[@JohnClulow]

​@@vuaecothank you, sir!

[@garrettgiuffre7298]

Capacity I would guess more ma

[@JohnClulow]

Typical alkaline 9V is around 500 - 600 mAh and the rechargeable Li on Amazon are rated at 1200 mAh. And the 14500's seem to also be around 1100 - 1200 mAh. So I'll be interested in seeing vuaeco's follow-up video.

[@himeccms893]

Wow! In all the time that I dealt with almost every form of consumer batteries, Ihave never realised that the AA is the same length as a 9V

[@tims8603]

I have an indoor/outdoor thermometer that eats batteries really fast. It takes 2 AA cells in series. It won't work well with rechargeable AA cells because the voltage is too low with those. I put a 3 cell parallel 18650 battery holder on the bottom. Made some dummy cells out of wood dowels with sheet brass terminals placed into the battery compartment and soldered the wires from the battery holder to those brass terminals. It lasts for months now. The nice thing about it is that I can swap the cells out at any time.

[@xXDannySilvaXx]

Ive been doing this to alot of my electronics. In fact I just did this to my multimeter because I didnt have any 9v batteries. Lithium batteries are so cheap and so useful.

[@christophernalbone6299]

I use 2032 coin size batteries stacked in seires. 3 volts times 3 equals 9 volts. Then use a 9 volt battery conector with leads. At the end of the leads solder on ring connectors and place the connector on the batteries. Red to the top and black to the bottom. Slide a piece on heat shink tubing over it and shink it tightly. Now you have a battery that will fit in any compartment. You just have a lower capacity.

[@adus123]

Disposable E-cigarette batteries are good for that sort of thing. Sometimes you find them in the street. There actually lithium ion batteries inside

[@maukaman]

Yeah I love those little mini pouch cells for stuff like this. Nice and compact, and I have a whole collection of them that were completely free!

[@simonilett998]

Most of them use lithium polymer cells, but same, same. Over the last few months I have picked up over 40+ of them off the side of the road, just keeping my eyes open when I'm out in my car. I picked up 2 more today near the end of my street, and one is recharging right now. Out of all the ones I've picked up, only 3 or 4 were no good, they'd been driven over by cars😁 Here's all the good one's I have collected so far: 33× 18450 - 5.18Wh. 5× 18500 - 5.92Wh. 1× 18250 - 2.22Wh. 1× 16350 - 2.405Wh. 1× 13350 - 1.85Wh. All 3 small one's each had a built-in recharging board with a type C connector included👍 I've already used 3 of the 18450's in 2 separate projects, and been thinking of making a couple of portable powerbanks of different voltages, so far I've bought a 6S balance charge board to build a 22.2V pack for my TS101 portable soldering iron. This video gives me a few more ideas of what the hell I can use some of the rest for🤣

[@garrettgiuffre7298]

If you go to the smoke shops you'll more than likely be able to find a ton in the trash they don't mind you talking lol not like they recycle them like the law states

[@adus123]

@@garrettgiuffre7298So people take them back to the shop to be Recycled and they just put them in the bin. That's insane

[@maukaman]

@@garrettgiuffre7298 definitely going to try that today, good tip

[@crumblenaut9776]

Excellent! Thanks for showing different devices, and ways of connecting them.

[@mati211p]

5:00 Worst problem is that positive terminal can be shorted with negative terminal by magnet and caused fire (that magnet which is in positive terminal because all battery case is negative terminal

[@maukaman]

You probably know this already but you can charge multiple series connected cells with more than one TP4056 if you power them from separate usb supplies. I use this trick for balancing and restoring power tool packs all the time, now I have a whole bunch of working 18v Milwaukee packs and I didn’t buy a single one of them! 😁 🤙

[@williammchugh4361]

I've retroed a few different devices with various Lithium cells and often just solder in a universal power connector I use which matches an Imax B6 hobby charger. The only disadvantage I see is that without a BMS, it is very possible to over-discharge the cells if you are not careful -which can damage the cells. It happened to me on a pet's toy. After that I try to use a BMS if only to protect the cells from being totally discharged (unknowledgeable people often use what we build). Again, enjoyed your work Vuaeco. BTW: The price of D Cells are totally outrageous.

[@TrevorSachko]

3.7v, chuckles. Use a 9v rechargeable...

[@mwint1982]

What about low voltage issue? Draining it below X volts is bad, no?

[@vuaeco]

There's no BMS so you will need to check it from time to time to make sure it doesn't get below 2.8V/cell (5.6V total). But with almost all 9V devices, they all shut down way before the battery reaches 5.6V.

[@jeremiahbullfrog9288]

This is brilliant! i never heard of these cells, thanks for the info

[@gg-gn3re]

18650, 14500, abundant cells. been around decades

[@jeremiahbullfrog9288]

@@gg-gn3re yes i use 18650 all the time i never saw the smaller ones but thanks

[@gg-gn3re]

@@jeremiahbullfrog9288There are also 10440, 18700, 20700, 21700, 22650, 25550 and 26650 lot of sizes! Also some others I think

[@omarsegura2847]

Great video! Thank you sir!

[@mathewrtaylor]

Thanks for this video, super helpful! This and your previous video on the 14500's are great, and I just ordered a batch because of your last video. I watched a video of yours talking about recovering batteries from battery packs. The limited ones I have done (both laptop) have all been 18650's. Are there known packs to you can consistently recover 14500's?

[@yv6eda]

Great tricks on your videos! Thanks

[@Edmorbus]

Thanks for sharing

[@alizawwad]

I enjoy watching your videos :), thanks and keep up the good work, quick question though, why don't you just buy rechargeable 9V batteries, it is available on the market and charged using micro USB cable, you may mount a port on the side of the cases so you don't have to open them every time you need you need to charge them!

[@vuaeco]

Very good question. Someone asked me the same question. Please see the answer on top pin comment.

[@jasonnguyen5842]

WOW! That's a great idea. I couldn't come up with that :)

[@daveb7999]

This is excellent information, thank you. I would like to make an 8.4V battery with Balance BMS. Could you please recommend which BMS would be appropriate for charging both of the 14500 cells at once? Thank you for any info you can provide. Love your channel!!

[@xerejuneseve6333]

2 li-ion batteries from e-cigarette will be cheaper because they are for free.

[@khoahatake2017]

Where do you buy the cables for balancing from?

[@jimthesoundman8641]

They are available on amazon, ebay, aliexpress, or temu. Just make sure you get the right size to fit your charger, some are smaller in real life than they look in the pictures.

[@garrettgiuffre7298]

Thag magnetic ideas great. I can't believe I never knew about that. So using it

[@gg-gn3re]

Yep, I realized this 15 years ago and never went back. Just convert everything with a pack on the bottom from old phone batteries and now 18650s 9v, AA and AAA total junk batteries

[@Resist_JWO_1984]

What can three C batteries be replaced with?

[@christopherleubner6633]

Multi testers make more sense to use the disposables, if you got something that drains them quick then rechargible is better.

[@KetansaCreatesArt]

What is "Found another Staad"?

[@robertwise7148]

I have a question un related, i built a 100w 4 wheel drive cart it is 48v When tested on a stand it rotates motors to full speed, when i put it on the ground and accelerate the power disconnects and i must unplug battery from controllers to reset Is there to much draw for the battery i built its 10000mAh with a 13s bms

[@andyfumo8931]

100w is nothing...how much does your motor draw??

[@ScottyK612]

@vuaeco looking to do a Honda Motocompacto upgrade, please let me know if you’d be interested thanks

[@jimthesoundman8641]

Are you from the Philippines?

[@garrettgiuffre7298]

I despise 9v. I love vape batteries come in all sizes. Grt a few to make 9v with the right sizes and boom rechargeable 9v

[@PinskiYT]

I see all these alkaline batteries that people put in their devices and I get frustrated because I tell them that is a waste of money why not just get something rechargeable

[@taoyen1579]

where can we buy these affordably?

[@vuaeco]

Plenty on the internet: Ebay/amazon...

[@chrismitchell6441]

Speaking of batteries, charge that phone

[@vuaeco]

That phone belongs to the 1% club. Watch this video if you want an answer: kzbin.info/www/bejne/fnbUgmyJZZmen5o

[@brucepugh1536]

2 x 3.7-volt rechargeable batteries in series at best is 7.4 volts starting off fully charged. This will look like a very weak battery to your devices. You say 8.4 volts in your video. I doubt this at load. Not sure how you come up with this number.

[@robertparisot944]

When the cell is fully charged, (depending on the charger), the voltage will be 4.1 to 4.2 volts.