Recently i’m working to fix PHILIPS SCE7640/12 Laptop 19V 2000mAh power bank.
I’v got from there 3 2000mAh fully operational Li-Poly batteries :)))) (one of them was bad)
So i’m was looking in my lab, for some use for them… then i notice my USB Power bank… it should have 12000 mAh capacity…. i open and check… Yyea… around 3000mAh real capacity (3V discharge) divide by four batteries mean 750mAh per cell !!!.
I found that 3 x Li-Poly batteries will fit inside this power bank…
I discharge them, stack in parallel and have 3.7V at 6000mAh capacity (declared when new).
After doing measurement, i got 5560mAh of real capacity 🙂 – Not bad
I added fore safety measure – NC thermal switch witch i got from other notebook battery.
It was really good job, because i double capacity and lose some weight!
Here are pictures from fixing.
Good job! 🙂