Flexvolt 6ah Complete Teardown

[@mvrak]

I opened it up and was considering desoldering.. I was like how could it be this complex. Thank you for doing the work and showing me that it really is that crazy. I hacked mine apart for the 18650s also.

[@doctorlefthandthread]

You are welcome this channel is first and foremost to help and hopefully sometimes to entertain

[@aiden2402]

When you said tear down. You weren’t kidding. I’ve seen vandals do a tidier job.

[@doctorlefthandthread]

It's how I roll sir

[@aiden2402]

😜 fair play to you sir!!

[@danielkerry8219]

It’s so easy to say never taking one of these apart lol

[@Tegelane5]

I've found that even completely empty quality cells are chargable, specially if there is some voltage 0,4V etc. I charge them with lab powersupply, one at time, current restricted ca 100...300mA, voltage set to 4,00 V, if voltage raises slowly but steadily then odds are good that cell is OK. It takes time though.

[@hectormendoza4158]

Ese cautin de Milwaukee me encanta 😊

[@doctorlefthandthread]

It's great

[@JesterBandito]

No- but this is insane? Haha what the hell. Fuck me, I really thought this was going to be a simple fix. God- what awful design choices for the battery, but great patience my guy.

[@josh-yy8wx]

Them yellow 6amps are shocking ive had about 2 broken from new, the old orinals in the grey casing i never had problems with them

[@mariusz1977]

the Flexi volt battery is divided into three separate 18V batteries and if one cell in one of the 3 batteries is damaged, the two remaining batteries force the four healthy cells of the damaged battery to have the same voltage in 18V battery mode 3.0 3.0 3.0 3.0 3.0 = 15V 0.00 3.75 3.75 3.75 3.75 = 15V 3.0 3.0 3.0 3.0 3.0 = 15V this effect is due to the fact that we do not have a standard 5s 3p connection but connect three separate batteries in parallel

[@doctorlefthandthread]

Great info thanks

[@mariusz1977]

​@@doctorlefthandthreaddoctorlefthandthread team 👍

[@IMPACT-NATION]

12 out of 15 ain’t bad at all buddy🤘🤘🤘. I remember seeing a video that explained why certain cells in the flexvolt packs, certain specific ones to be exact, always fail if not charged for a period of time. Basically sitting idle in a tool or on a shelf not being used. I’ll see if I can find it and send a link brother. 🫡

[@doctorlefthandthread]

Thanks Brandon that would be cool to see

[@IMPACT-NATION]

@@doctorlefthandthread kzbin.info/www/bejne/kHurfKKlZ9ibeKM

[@garthqueen]

@@doctorlefthandthread No link sent...must have been BS

[@doctorlefthandthread]

@@garthqueen not bs there is a guy called matthias on youtube that's who Brandon is talking about. I watched the video there are 3 banks of 5 18650 2000mah cells in the Flexvolt the Middle cell in each bank is more likely to fail. Brandon is one of the best he is not known for bs.

[@TacticalThib]

Yeah you actually have to use it as a 54v not just 20 or the cells become unbalanced let the world know doc!!! And sorry I've missed a couple vids I've been very busy!!

[@doctorlefthandthread]

Thanks as always for your helpful comment. I appreciate all your comments and support it's not easy to see all the crazy videos I post. I have alot to come so watch this space. Take care Branden

[@jayperez3431]

you can use them in 20v just fine, you just cant be leaving them discharged for long periods due to the 60v design some cells have a tendency to drop way lower than others. always store these babys with at least 50% charge off of a dewalt balance charger. @@doctorlefthandthread

[@James-fr9sq]

😮 You just threw money down the drain ripping it apart like that.. Could have just put new cells in it.. Better ones like Molicel.. 😁

[@FreshCityVentures]

You make a video “putting new cells in” to a FlexVolt battery and I will send you all the cells you need for free. It’s basically impossible, fella. Your time and sanity is worth more than a refurbished battery.

[@emmettturner9452]

You can’t replace the faulty cells without taking off the sides and you can’t take off the sides without taking off every single spot welded nickel strip. You can’t just drill out a single bank of bad cells without risking an explosion.

[@FreshCityVentures]

@@emmettturner9452are you replying to me? Because that’s exactly what I just said.

[@emmettturner9452]

@@FreshCityVentures You told the OP it’s not that simple. I’m telling the OP why it isn’t that simple.

[@paulhitchens532]

If you are just going to destroy the thing a sledgehammer would be faster!

[@doctorlefthandthread]

I wouldn't have got 12 viable cells to build batteries if I had used a sledgehammer . Thanks for your comment

[@jma8352]

thanks, i suspect this is what ill find as i have a bad controller or bad cells. no way to put back together i see lol

[@doctorlefthandthread]

No going back lol

[@hectormendoza4158]

Jhay un error al usar el cautin y es que lo acuestas mucho asta acer corto sircuito deve usarlo minimo a 45 grados para que no pase eso

[@doctorlefthandthread]

Thanks

[@williemobrien]

Bet ya the 3 bad wer the middle cels in each set

[@Quarterpounderspatch]

Would you sell me the bms from that please? You cannot but the bms

[@doctorlefthandthread]

You will need to email your details to me

[@supersoccer88]

Lol that’s a 2020 battery, you literally could have got a brand new battery until end of 2023 from Dewalt. Just got my 9amp replaced.

[@hectormendoza4158]

Triste como una pila tan nueva fallo

[@doctorlefthandthread]

Yes I agree

[@hectormendoza4158]

Al fin usted no la reparo nada 😢

[@doctorlefthandthread]

Not this time

[@thelewisvrfamily2113]

Easy to fix. I repair them as a buissness and sell the refurbed ones 😉 probably heard of me

[@thelewisvrfamily2113]

Also you’re scaring me with how rough your taking apart and what joints your connecting 😂

[@doctorlefthandthread]

I always thought they seemed too much trouble to repair and I don't like the knock off boards that are available. What do you think?

[@doctorlefthandthread]

I know I am a self proclaimed savage but what can you do?

[@thelewisvrfamily2113]

@@doctorlefthandthread and fuses are usually the course of your know what your looking for on the bms it’s pretty easy however you’ve got to take it off in one piece gently and when working on them I would also take the springs out of the 54v slider and make sure it stays in 54v less voltage across the terminals as in for removing the bms otherwise it tends to blow smd fuses and resistors on the ribbon boards

[@thelewisvrfamily2113]

@@doctorlefthandthread I wouldn’t ever buy one of those nock of boards

[@СуперМэн-ъ2н]

идитот