We pluck out the slender logic board to get a better view of its silicon. Here's what we find:

Broadcom BCM20733 Enhanced Data Rate Bluetooth 3.0 Single-Chip Solution

ST Microelectronics STM32F103VB 72 MHz 32-bit RISC ARM Cortex-M3

NXP 1608A1 Charging IC

Texas Instruments BQ24250C Single Input I2C/Standalone Switch-Mode Li-Ion Battery Charger

Intersil ISL656A Two-Phase PWM Controller

International Rectifier IRFH3702 Single N-Channel HEXFET Power MOSFET