Teardown of the Hanmatek Electric Screwdriver

This is screwdriver #4 for me. Let's hope this one lasts longer than the others...
The electric screwdriver this replaced:
Teardown: • A Great Electric Screw...
The electric screwdriver before that:
Review: • Review of the Electric...
Teardown: • Random Teardown #010: ...
I have a second channel:
/ @markfurneaux2659

[@simontay4851]

Ive got an old vintage british made electric screw driver with beefy steel gears. I salvaged it from the scrap bin where i used to volunteer testing/repairing electronics before the pandemic started. The plastic case is very brittle so i glued it but the motor and gearbox is all solid steel. I replaced the 2 old dead NiCd batteries with 2 18650s and installed a 4056 charge controller board. It has a switch to connect the batteries in series or parallel. Obviously in series the motor runs faster but with less torque. It works very well.

[@dtgoodwin]

I believe the P in 18650P denotes that the battery has built-in protection.

[@RavenDrakearud]

Mark!? MARK!? You're not dead!?

[@positivemelon7578]

Lack of discharge protection is a pity, the motor probably spins fast enough to still be usable at ~3V so I could imagine people discharging the battery to 2V or even lower

[@SeanBZA]

Bought a cheap Ryobi branded one that used Nimh cells, and after the cells died replaced them with a 18650 cell and a charge board. Cannot use the undervoltage side as it trips out, so direct to battery, but does not worry me as single cell and I have plenty more to use there.
Took another and did the same, just instead of the motor and gearbox used a laser diode, now a USB charged cat toy, which can last months of use. The cells had rotted and destroyed the motor as well.

[@spakecdk]

You can get namebrand screwdrivers of this form factor, like Bosch for instance.

[@Lagittaja]

Considered the Bosch Go? Gen 2 even has a clutch and an electric brake. AvE has a video on the first one.

[@margaretomahony7528]

Charger broke in my one where could I get charger for same tks

[@isj-3227]

@mark Use a Dewalt DCF601B or similar, love it, works great and can even be used in more heavy duty work.

[@HeshamAl-Eryani]

is there nut attachments that I can buy with this? If yes, please give me the link

[@user-vn7ce5ig1z]

Mine was a brand-name one, but it was a while back so the battery was NiCd and had a problem and stopped working. I took it apart and it looked the same as yours, but the ball-bearings fell out and a couple of them disappeared into another dimension. 😕 (I also have a "1 million candle" spotlight from the same brand-name that also died because of the battery, but that one is lead-acid. 🤦)

[@BeeeHonest]

I think it is great you spent so much time analyzing it, why not add one extra min to ACTUALLY demonstrate and see how well it performs?

[@MrDasebasto]

Anyone can confirm the charging stops after 5 hours or so ?

[@adrianredodo]

It's our world ;(

[@Kart0nas]

check out 'Xiaomi Mijia Electric Screwdriver Review' by 'darieee'

[@spmain97]

Still working? 🥸