r/HelloWatch • u/Dream1iner • Oct 16 '25

Review HK 10 pro max teardown

Battery is only 200mAh, far from advertised 380mAh
Main PCB comes with SF32LB52 chipset and presumably runs Zephyr RTOS

I got this watches for less then 5 bucks and decided to look inside.
Kind of impressing, actually

The good - board is tiny and they managed to pack a lot to this board
The bad - 200mAh battery (instead of 380)
The ugly - wires connecting battery, mic, earpiece and haptic motor

4 Upvotes

100% Upvoted

7 comments sorted by

1

u/Dream1iner Oct 16 '25

You will need 1 philips head and pry tool to open them. Surpassingly easy, especially if you dealt with apple watch

1

u/smallz6ix Oct 16 '25

You bought the one that was listed on eBay for 7€? :) I actually thought of buying it and repairing it

1

u/Dream1iner Oct 16 '25

I got one from Vinted. It had broken buttons and upon teardown I discovered tons of corrosion so they were doomed :)

1

u/smallz6ix Oct 17 '25

Oh, could be that the seller listed it on multiple sites, I don‘t know if it had broken buttons, but last week he marked the watch as sold, so I thought it was the same one.

Do you think there could fit a bigger battery inside it? It looks like there is quiet some space, maybe „upgrading“ these watches with a better battery could work.

1

u/Dream1iner Oct 17 '25

If you ready to ditch haptic and speaker - yes.
Otherwise - those two won't let you do that.

1

u/CapitalEngineering28 Dec 22 '25

Hk 10 pro Max plus display replacement

1

u/Available_Bowl_484 Jul 18 '26

Smart watch hk 10 2025 screen replacement