I have the pistol grip version of this one. Same happened to me after not having used it for a very long time. I left it for my apprentice to use and aparantly he was a little embarrassed to use what I call the noisy cricket. So it was left unused. I took it back and found the battery flat and “would not charge”. I opened it up and checked and the cell was discharged. I put it back together tho as I know most BMS / charging chips have a feature for low voltage cells. They bring them up extremely slow to avoid damaging the cell. I put it on the charger and it looked dead, went out on a visit to a customer and when I got back to the office it was doing the normal charge. :) So I bet yours would have done the same if you left it plugged in for a couple of hours! :) Just a tip for the next one you come across.

Are you salvaging your lithium batteries, or buying them new ? I've converted a couple of small electric screwdrivers to lion from salvaged batteries, but find they don't have the same tork/power as the original NiCd batteries. Another good job, i do enjoy watching your videos, you deserve more views.

Gracias por tu aportación,yo también hice ese proyecto y es una perdida de tiempo

Nice

the charger is checking for over and under voltage on the battery.. its a protection circuit .

Do you have a parts list for this project?

Бесполезная самоделка вышло, с каждой кадре автор мучился и даже не показал, купи нормальный быстрый съёмник

Did you consider not using the type C USB connector on your Lipo charging board, and instead, solder the wires from the barrel jack charging port to the Lipo charging board directly? This way, you can use the same AC adaptor to charge the battery.

Glad you worked it all out and working well done

I know where the charger is .....its in the stable..ill get my 🧥..also I love that the fact you sound like boycie 😊

When you had the thing in pieces, you can plug the charger in and measure the voltage on the battery. If the charger circuit is working properly, you should see the voltage on the battery creeping up slowly ;-)

Just Fix the damn thing!

Nice also no use the BMS card some body use BMS card what different

I have that problem when i push the button won't start or starts and stop... i benched it from than. Trash model.. had it for about 1 month and gave up like that. I'm a sparky i had it for panels.

nice repair, i can't do this, i will not remember how many i have done after few turn 😁

Good job Dom, I’ve watched your entire video list, very good work, but the latter ones are better cause you started speaking and explaining what was happening, keep up the awesome work mate. 🤙🏼🇦🇺 Joe from Australia 🤙🏼🇦🇺

I have the dremel version of this screwdriver very handy .You may want to invest in an inline USB voltage /current meter then you can tell if it is charging . The Fnirsi is very good

Hello. Thanks a lot for this very helpfull video. I have a question. I have lost the very small gear with 6 teeth and a D-shaft that comes to the motor. do you know where i could by it? On aliexpress i find hundreds of all kinds but not this exact model😢😢😢 i would like so much to repair this screwdrewer than buy a new one even if it is unexpensive... thanks in advance for any clue...

Remember where you got the idea when your screwdriver catches fire, do not trust lithium batteries bought on line

I did a repair on this model not so long ago, it was swine to put back together, no space wasted, so compact. The problem on mine (actually my brothers) was the chuck, it wouldn't turn, turned out that a ballbearing had slipped out of place and was preventing the chuck from turning. Needless to say I'd completely stripped it down to the bare bones before I found the problem. Works fine now.

Nice looking screwdriver and a great fix. the WEEE bin must hate you 🙂

Another proper job.

thank you for posting this video. i have a similar quick read thermometer that stopped working. your video helped me open the case without damaging it. the broken wire is fixed and it's working again... from one daft old man to another 😉

i did the same but please note the bms u are using is max rated at 1amp...the tool goes up to three when under load so it wont last 😞

What was the load? Voltage alone doesn't mean very much. If you can pull 100 amps at 5v then that's 500w. Which is better than 12v at only 40a. But I can just about tell you what the problem is. It is your rotor disks being steel, unlaminated, and in no way optimized for use in an alternator. And well, the magnets could have been bigger and stronger, yeah. Okay so maybe not particularly practical or even cost effective, but that's cool, you did something instead of just talking about it and dreaming big dreams.

Why not just pull one of the pole pieces off and put a single big ring magnet right where the old rotor coil was? You would have essentially the same device as before, except instead of producing the field with a single electromagnet, you produce the field with a single permanent magnet. You might have to stack multiple ring magnets, and maybe make a bushing if the shaft is too small, no biggie. Of course then you would also have a pretty cool DIY PMAC motor, if you provide a controller and a means of commutation such as hall effect sensors.

Well done

Hi Dom great video, may I ask what gas are you using with the mig welder? Oh and also, do you not get burnt with no gloves on? Keep up the great work 🤙🏼🇦🇺

Thank you for this excellent video! Would it be possible to share with us the values of these two components or an approximation? Cheers!

Did you try to put a resistor 300ohms between the green standby wire and black neg in the plug..? Never mind, might pay to watch the whole video before making a stupid comment.. yep I’m an idiot.. keep up the great work 🤙🏼🇦🇺 Joe from Australia 🤙🏼🇦🇺

I think you had a shorted turn? As that might get hot when the magnetic fields are changing, but won't show up doing a resistance test. You could try an inductive ring test as this will normally show up shorted turns in a transformer.

Quick question, what the taps you are using, please 🤙🏼

Try putting heat shrink over the clips, they hold the work better, and without any marring marks. 🤙🏼

Invest in a spot welding machine, far less heat going into the batteries, means a longer life, just a suggestion DOM.

Toss it in the bin

Just put a speaker magnet inside the rotor

For what its worth. You should have just taken the electromagnet out of the rotor and put a speaker magnet in there with a hole already in the middle..

Try only 10 magnets evenly spaced

I think you should try 10 magnets 4 north at 12-6-3-9 o'clock and the rest south.. that's how it works out in my head. That's how I would do it. But that's just my opinion 😊

¡Muy buen video!! Déjame comprender esto: ¿conectas B+/- a la batería, y dejas libres las conexiones OUT+/-? El motor se conecta directo a la batería? Ningún diodo desde la fuente al INPUT+? Gracias por tu excelente trabajo!!!

No no no, never solder any Lipo batteries of any shape or size, as you well probably already know, the heat of a soldering iron, makes them very susceptible to fail, or even burn your house down, if it’s only for one battery, I recommend you purchase a spot welding machine/kit, you will have a lot more times to use it, it will pay for itself in no time, and not burn your house down, longevity of the tool will be greater, just saying old mate.. 🤙🏼 On another note, your using pz bits instead of ph bits, that’s why they keep chewing out the bits or the screw head..

I can see the WEEE bin's tears from here. 🙂

You are ever resourceful. Another great job done.

You are engineer or something ? Thank you.

should have just replaced the battery when you had it de-soldered and saved yourself some bother..

Just a quick question cobber, the pick with the magnet in the bottom, did you make that, or can it be brought? Cheers Great video mate, keep up the great work mate. 🤙🏼🇦🇺 Joe from Australia 🤙🏼🇦🇺

Doing a swell job with the videos buddy, just a tiny tip, get a variety of colour sharpie’s, makes life a lot easier.. just saying.. 🤙🏼🇦🇺 Joe from Australia 🤙🏼🇦🇺

Nice repair. looks like they put a bit of thought in to the design and did not cut cost in production. Somewhere there is a WEEE bin dying of hunger. 🙂

Good

superb video. I have a few of these screwdrivers that also have duff batteries. They are a superb screwdriver from memory. can i ask where you got the battery replacement or the voltage of the replacement battery? Many thank in advance