The board is packed with lots of resistors. What sticks out are these components:

An ATMEL MEGA 328P Battery Management MCU

Ablic (formerly Seiko Instruments) S-1142B33H-E6T2U 200 mA LDO regulator

FL12.000 12 MHz quartz crystal oscillator

On the flip side we find these:

Magnachip MDU1931 single n-channel trench MOSFET (x4)

RS2M rectifier