£1 Wickes 10.8V 1.3Ah Power Tool Battery Strip Down
JLCPCB Prototype for $2(Any Color): https://jlcpcb.com
A 3-cell cordless power tool battery on sale for just £1 from Wickes. What's inside?
https://www.ablic.com/en/doc/datasheet/battery_protection/S8200A_E.pdf