Hi, I congratulate you on the splendid restoration work! I am an electronic engineer and I have the answer to the question you asked yourself at the end of the video: NiCd batteries have a nominal voltage of 1.2V and when fully charged they reach up to 1.3V. The old battery pack contained 12, which corresponds to a nominal battery voltage of 14.4V and a maximum of 15.6V at full charge. Instead the new battery is composed of 4 NMC lithium cells which have a nominal voltage of 3.7V but when fully charged they reach up to 4.2V and overall correspond to 16.8V at full charge. The charger of the old battery is built to charge up to a voltage of 15.6V so if you use it to charge the new lithium cells you will not damage them at all, but rather you will always charge them up to about 80% and it is an optimal condition for the life of lithium batteries. Obviously you will not exploit their potential to the maximum but if this is enough for you, this is fine! Hope I've been of help, congratulations again!

@gear_show

3 жыл бұрын

Very well explanation, I do appreciate with your information. Now I got it.

@torukojinnn6331

3 жыл бұрын

Dear Marco Zeni Master, I have dyson V6 when the battery pack is full it shows 24,6 v and when i used it is empty it shows 1V .and i have been using that battery pack for the last 5 years. Does it mean battery life is finished. By the way when it was new running time was 15 mn ,now it is 8 mn. Thanks in advance

@redteamla

3 жыл бұрын

So it is safe to charge these homemade battery backs with the original NiCd charger? The BMS can handle that? Can you safely keep the battery in the charger for days?

@herik63

3 жыл бұрын

I made similar modification, but the drill was a older blue model, 9.6V, I removed all the electronics inside the charger leaving only the transformer, the idea was using a simple constant current/constant voltage regulator, I had only issues with the voltage, after rectify was 16 and more volts, noto suitable for my application, I had to use a single wave rectifier to give less to the regulator, everything went fine, and my old bosch is still alive and kicking, I bought it when I graduated from school in 1984 ;) I used very nice and powerful Sony VTC-5.

@advancedelectronics5333

3 жыл бұрын

DO YOU USE A 2S BMS ? USING 16 VOLTS NO PROBLEM THE BMS WILL LINIT THE CHARGING CURRENT TO 500 mA per cell and the voltage to 8.4 volts on the cells

This dude does the most thorough restorations on power tools and he still apologizes for any mess ups along the way, then caps it off with well wishes to people dealing with COVID-19. What a champ.

@LegoMan-cz4mn

4 жыл бұрын

Spot on!

@gear_show

4 жыл бұрын

Mistakes always happen, even my writing...

@LegoMan-cz4mn

4 жыл бұрын

@@gear_show no worries about that, you are human after all 🙂

@mannyvazquez6835

4 ай бұрын

GGG Yrddy😅thbxv Vejbhxhd fun? We?

Thanks to you i rebuild the batterries from my old Bosch PSR12 with lithium 18650 and now it works perfectly! Thank you very much one more for your videos my friend!

This video gave me some good ideas. Thank you. Samos island, Greece 🇬🇷

@alisaglam1918

3 жыл бұрын

Bu matkabı satarmısın samsun

@octaviouselec

3 жыл бұрын

Γειά σου πατρίδα. Από Αθήνα.

@GOTZI9

3 жыл бұрын

Πολλοί Σαμιώτες βλέπουμε το κανάλι του τελικά

Cant have enough of your videos man:D keep up the good work

@gear_show

4 жыл бұрын

You still need videos like this more?

@itsmiggy3446

3 жыл бұрын

@@gear_show yes i will answered yess

Great job ! An old drill back to service !!

I did exactly the same thing with an old Ryobi 12 volt drill. The NiCad batteries never really held a charge, so I put 3 lithiums in each, and I can use the drill for days before switching batteries. New life for an old drill, and a 3S BMS is a lot cheaper than a new drill. (I had perfectly good cells in a few old laptops that I took apart for parts.)

Very professional job!

Bosch drill ;Made in Malaysia. Thanks for your using Malaysian product

@gear_show

4 жыл бұрын

My pleasure!

Genial tu trabajo y video. Muy interesante y explicado en imágenes. Saludos cordiales desde Lebu Chile

Two Words : Simply Excellent! 👏👏👏

@gear_show

3 жыл бұрын

Thank you so much 😀

I have done this exact thing to this exact drill 2 years ago, still works 100% fine!

@nz9552

3 жыл бұрын

Hi bro, What type of battery is used? I try to diy, used battery 18650 , 30A?

@ionutanghel2849

3 жыл бұрын

@@nz9552 i used some used laptop cells... i don’t know the amps... but IT’s not more than 2000mAh... the bms used was a 25A bms Off eBay

I always like to watch these kind of videos, nice and give some experience to do what you didn't know what to

@joaquingrande1674

3 жыл бұрын

Yeah?

C’est excellent merci beaucoup pour l’exercice

Very good professional work...keep going

me encantan tud videos de reparaciones. un saludo desde murcia－spain

Bravo, excellent travail. Bon courage

These are my MOST favorite videos, I just love when someone restores something that is destined for the scrapper to fully working order! Also I love when you clean up the things SO much that they're identical to brand new I do have a few salvaged cells from laptops... Maybe I'll try this?

@kristianrussell9803

3 жыл бұрын

For anyone wanting an amazing tool I would highly recommend GenScrew's electric screwdriver kit. It is an actual godsend: genscrew.com/kit

@vane5736

2 жыл бұрын

dont use laptop cells most tools require special high drain 18650s.

@efdawahfan

2 жыл бұрын

you need at least 10A drain 18650 for these maybe even more differs with the tool you using.

Man i just did this thing to the same drill model, same bms type and cell number, i wasn't sure if i can use the same charger until i saw this video, thank you very much for this ! I had subscribed!

@nautilus265

3 жыл бұрын

Any issues thenafter ? I am thinking to make the same experiment with 18650 batteries + BMS + original charger Ni-Cd but I am worried if this is safe

Excellent job!!!

Thank you for teaching me this.

Great.. I'm going to do the same thing with some older cordless drills...

very good job.well done!!!!

Excellent! Completely clear instructions. Exactly what I need to do for my Bosch PSR - thank you!

@gear_show

4 жыл бұрын

I'm glad it helped!

Nice ....Wow that old model but looks original..love Bosch

I honestly love these drill videos! The time and effort they take to fix is crazy! Keep up The good work!

@gear_show

4 жыл бұрын

Thank you so much :)

@abdelkrimsabouri1927

4 жыл бұрын

Jg

Memorável 🤩 tenho pesquisado o assunto e vi diversos vídeos até chegar ao seu; alguns em minha língua natal e outros em vários idiomas e todos foram muito instrutivos, no entanto o seu vídeo me chamou a atenção pelas interações dos participantes que, generosamente, ofertam informações complementares respondendo aos questões de outros que como eu buscam respostas para o uso do "carregador original" sem necessidade de descarte. Infelizmente, como dito em alguns comentários, o seu uso pode ser perigoso caso entregue mais de 16v...o que faria a aquisição de um novo carregador dedicado as baterias de litio mais seguro para esse projeto. Aqui no Brasil há divergência de opinião quanto ao uso do carregador original, mas nenhum vídeo sobre "uma adaptação" para usá-lo o que seria ótimo. Sou grata pelo vídeo e, por gostar do seu estilo respeitoso e gentil, fiz inscrição no canal para acompanhar o seu trabalho. Sou agradecida também aos seus colaboradores que nos comentários ofereceram informação valiosa e também gentil com palavras de incentivo. Saudações do Brasil- setembro de 2022.

@gear_show

Жыл бұрын

Fico muito feliz em saber disso, muito obrigado por compartilhar!

Very instructif video ...I love it ....thankyou

Cheap and amazing restoration congratulations

@gear_show

4 жыл бұрын

Thank you!

Excellent work👍👍👍. Thanks for sharing.

@gear_show

4 жыл бұрын

You're welcome! thank you!

Thanks for your video, it’s very helpful . Good job

You are very clever. Thank you for sharing this great idea.

Well done!

OLÁ , EXCELOENTE VIDEO, BEM ESPLICADO .OBRIGADO .

Very good technical job .

Excellent work!!! Great!!!!!

@gear_show

4 жыл бұрын

Thanks a lot!

Schönes Video. Und sehr saubere Arbeit. Schöne Grüße aus Germany Berlin

NICE AND CLEAN JOB.

very clear tutorial

Excelente y limpio trabajo, el mejor que he visto. Profesional. Thank you.!

buen trabajo, ¿podrias convertir el cargador de Nicd/Nimh a uno de Litio usando la misma carcasa? gracias por tu respuesta, saludos desde Peru

Good restoration work

Muy buen video !!!

TOP DEMAIS VALEU A DICA...

Dobra robota 👍

Çok iyi bir çalışma ve sürükleyici bir Video... PSR 14.4 BOSH matkabım İyi bir restorasyon ile hayata döndü. Paylaşımlarınız için Teşekkürler. Türkiye'den selamlar...

Thank you very much.

Nice job! Thanks.

@gear_show

4 жыл бұрын

Thanks for watching!

I really liked yr vid a lot, since I have been revamping that old stuff myself recently - all into 18650 LiIons.This transformation is at the cost of the device to charge this battery pack, however, which needs to be either a balanced charger (then you would have to provide leads to a balancer) or a fully regulated (laboratory) power supply. I have both, so I do not bother, but be warned that your former battery charger goes directly into trash, unfortunately as BMSes come in two flavours, so beware!. Hope you'll be happy with the retrofit, anyway, as I am!

주의할점 한가지! 배터리 직렬 연결시에는 셀간 절연필수. 셀간 공간을(약1mm) 두거나,절연지&절연링 넣고 고정하세요.시간지나면 외부충격으로 배터리 비닐 마모로 인하여 short로 화재 위험이 있음. 영상 잘보았습니다 ♡

@gear_show

10 ай бұрын

공유해 주셔서 감사합니다!

excelente!genio total mejor que el original saludo de chaco kapo.

very good. thank. very nice job

awesome bro

MAGNIFIC.

Another great job. I love your videos. I really like to see that recicle place. Big huge from Argentina

@gear_show

4 жыл бұрын

Thank you so much for welcome me to Argentina!

Awesome! I want to do this to my old set, too! Model: Bosch BAT025's

@gear_show

4 жыл бұрын

That is good time to try, you can do it!

@Luzeon

4 жыл бұрын

@@gear_show I need that bms and figure out a diy tack welder. But thx. I may rewatch this video many times. Be safe, and keep making great videos.

Fantástico meu irmão!

Muito bom o teu vídeo ! Tenho uma Makita 14,4 v ! Vou tentar restaurar ela !!

Nice job 👍

Thank you dada 👍💐

Very good job👌👍

Beleza de trabalho vc eo cara

Dear Mr"Gear Show" . I can assure you, that Ni-MH charger can't be used with Li-Po cells. Spend 3$ and buy DC/DC step down module with voltage and current control. Take down charging unit from charger, and put new module after diode bridge (put into module appx 18V DC). Output contacts mount straight to charger output. And job is done. If you will use NI-MH charger it will destroy Your cells. You should read about Charging VAC (Volt-Amper Characteristics) of Nicel and Lithium battery cells. Forgive me saying, but I'm an electronics and telecommunication engineer. I know what I'm saying. Best regards.

@andreykldjian

4 жыл бұрын

Even with the correct BMS in place? By the way, he's using the wrong BMS for the job.

@E-hab

4 жыл бұрын

@@andreykldjian What is the correct one?

@sghr220

4 жыл бұрын

​@@E-hab He is using the correct BMS (4S 40A). Which is designed for, as the name suggests, a 4 cells in series. 40A is the maximum continuous discharge current and 20A is the maximum continuous charging current. Those numbers assume very good cooling so they're to be considered an upper limit. One thing to note about the connections (soldering) is that the inner connections between the 4 cells and the BMS don't need to be heavy gauge. They won't be carrying any serious current as they're for sensing. As far as i can see and keep in mind that i am a bit old. That's an AL 60 DV Bosch charger for the 14.4v Ni-Cd battery. The old battery got 12 cells each with 1.2v nominal to make the total of 14.4v. The charger output voltage is around 15.83v which was just fine for the old Ni-Cd at 1.32v per cell but a bit low for the 18650. The new 18650s can take up to 4.2v per cell or 16.8 for the battery as he says at 17:12 in the video. Long story short, the charger output is a bit lower than what the BMS can work with if you want 4.2v per cell. I think that BMS needs something like 18.1v input to be able to charge the new cells fully. So you can either gut the charger, keep the shell and the contacts and install a small 18v SMPS board inside which is kind of a crappy solution because it won't supply the current for fast charging. Or you can hack whatever board Bosch put in there to get the 18 volts you need. Some of those charger revisions work with PICs, Max232s or the TL494.

@cedley1969

4 жыл бұрын

I did exactly this modification over a year ago using a similar chinese BMS and charging on the original Bosch nicad charger. I have had no issues whatsoever other than the BMS overcurrent cuts in if you pull the trigger too fast initially.

@user-id6mj8uw9b

4 жыл бұрын

@@cedley1969 Looks like you have a weak cells. When you pull the trigger to fast voltage goes down and BMS shuts down power. Use a capacitor 16-25V 10.000mF connected on BMS output contacts.

👏 Excellent job, keep going. Where you live? I have 2 drills need to be repaired. You might help me to repair them.

Good job!😎

Terima kasih atas berbagi ilmu cara mengatasi kelistrikan pada cordless.

@gear_show

4 жыл бұрын

Sama-sama, saya senang video saya membantu Anda.

@muhamadhamami3811

4 жыл бұрын

Good lock always to you my brother.

Fantastic! Congrats for post your video.

@gear_show

4 жыл бұрын

Thank you very much!

Great job worth watching

@gear_show

4 жыл бұрын

Glad you enjoyed it!

I envy your skill. I will try it. Thank you.

@gear_show

3 жыл бұрын

You can do it!

Good work Done 👍 Thumbs up 👍 👏 👏

@gear_show

4 жыл бұрын

Thank you 👍

عمل رائع شكرا لك اخي Thanks

Job well done

Good job

is a good👍🏾👍🏾👍🏾👍🏾salaam from borneo

Good works

Fantástico!

Look good than before...

i love your video sir. btw im from malaysia 😍

@gear_show

4 жыл бұрын

Thank you 😍

@thebeast7690

4 жыл бұрын

my pleasure 😂💛

Good job bro

nice work

Nice. I hadn't thought of putting the cells in L shape. I refurbished my METABO (12V, NiCd) in a similar way, you can fit 2 packs of 4 18650 cells in a 2x2 setup in there (as 4s2p). But you definitely have to sharpen your drill bits :-)

@gear_show

4 жыл бұрын

Yes it is, I drill it touched the screws inside the wooden. Anyway thank you for sharing.

Excelente.

good job

harika olmuş elinize sağlık.

Good!

super awesome!

@gear_show

4 жыл бұрын

Thanks!!

Quedó perfecto

Genial.!!!

Good job 👍

@gear_show

4 жыл бұрын

Thank you!

No problem charging the 4s li-ion cells with the old ni-mh charger. Max current from the charger i ok, the cells balancing will be done by the BMS, as overdischarge protection. You will only charge the new battery up to 15.6, that is 3.9 volt per cell, so almost 70% of the full capacity. It's not bad at all, and the battery will last many cycle this way. Good job!

@gear_show

4 жыл бұрын

Thank you for sharing!

@Kungfupanda839

4 жыл бұрын

Is it advisable to charge li-ion using old ni-cad charger rated 12-14v with 1.5A?

@GiovanniEsposito5

4 жыл бұрын

@@Kungfupanda839 Check the output voltage of the charger. If it's not over the fully charged voltage of the battery pack you want to charge and you have a bms, it should be safe, as long as the max charge current is within the li-ion cell charge specs.

@johnparks2521

2 жыл бұрын

i used 4 cells and a 15amp bridge rectifier with 2x 5amp shottky diodes inline between + and - on the bridge rec, so in through any AC terminal ,+,-,+,-,+,-, and out through the other AC terminal, (draw it out to understand) put this inline with the 4 cells via the AC terminals, the forward voltage drop on 4 diodes going both in and out of the lithiums allowed me to use the makita charger as the voltage is too high otherwise, it only stops charging if I used used 2 shottky diodes in the middle of the bridge, all parts were salvaged from old PC psu's. Bridge was D15XB 60 on a heatsink and various shottky diodes worked, SB540, SB5150, 31D0046B. Keep the temperature sensor and thermal cutout in the battery housing. Was this just luck as im damned if i can explain the science why this tricks the charger into stopping the charge before it got above max of 4 x 4.2v ie.16.8v,. Dont flame me bro, i didnt even use any BMS module, i was desperate with 3 dead makita 9.6v drills that i couldn't buy the original batteries for in HK anymore. I dont charge lithiums indoors, i never let them go flat. With terminals to the outside of the case i can monitor its charging state staying within their 3v to 4.2v safe operation window.

best job🙂👍

Muito bom o trabalho, bem caprichado

Szép megoldás

Thợ nước ngoài hay hơn thợ vn ,vn mà thay pin lion mà xài mạch này thì phải móc dây ra để sặc bằng alapto còn đằng này cắm luôn vào cái sặc rin mà vẫn nhận sặc được, quá giỏi 🏆🏆👍👍👍

my dream tool

This guy can fix everything with baking soda 😂 😂

Greetings from Malaysia 😍

@Super_Natural_Power

3 жыл бұрын

Dri mna ?

Brilliant idea i have sake drill needs battery upgrade Do you have the link to BMS

welldone sir

Long video and editing is a must. Thanks