u/el_charlie

Because the frequent power blackouts in my country, I have at hand a desk fan with a 12V 0.5A fan, so I purchased a 3S 40A BMS and 6x 18650 batteries to be charged by the BMS. The battery wiring is exactly like the 1st picture. I also got a 12.6V Li-Ion charger (2nd picture).

I'm aware that I need to wire the DC adapter's positive lead to the BMS' positive pad and the same for the negative lead. But what about the actual fan (with its own switch)???

Do I wire it parallel to the charger and BMS???? Do I need diodes???

The freaking AI suggested 2 diodes, one from the DC jack positive terminal to the diode's anode, and the other diode from the BMS' positive terminal joined at the cathode and then that joint part goes to the switch. But I fear that with that, instead of 12.6V, the BMS will receive less voltage because of the Diodes.

Can you help me out the correct diagram to wire the BMS to a DC fan???

My goal is to keep the fan on on battery, but also on wall power. If possible, to be able to run the fan and charge the batteries at the same time.

This is my latest Cinebench 2026 run after replacing the stock paste from my P14s Gen 5 AMD with the 8840HS processor with PTM7950.

These are the values I have, before and after and the percentage increase:

• GPU: 5397 - 6105 (113%)
• CPU Multi: 3050 - 3188 (105%)
• CPU Single: 396 - 412 (104%)

Not bad for just a repaste, and the laptop is not that old to begin with. I bought it certified refurbished on Lenovo Outlet but came with just 1 battery cycle and smelling like new.

I bought it based on reviews for that particular seller on eBay and it seems to be legit.

The temps weren't actually that bad on stock paste: high 30s, low 40s C on idle and up to 90C on full load. Now the idle is a bit higher (basically low 40s C), but now it doesn't seem to reach 90C, just mid 80s C.

Here's me, playing Forza Horizon 6 on my P14s Gen 5 AMD. Of course I use it mostly for work, but do play from time to time. It runs at around 50FPS. Not too bad for the Radeon 780M!

These are the g*mes I've played:

- Cyberpunk 2077 (Phantom Liberty)

- Horizon Zero Dawn and Forbidden West

- The Last of Us Part 1 remastered and 2.

- Metro Exodus

- Forza Horizon 5

- God of War 2018 and God of War Ragnarok

- Death Stranding 1 and 2.

- Fortnite

... And some.others I don't remember.

Maybe we can Quick Share to iOS devices, but I don't have any available to test.