The Astro 112D Digital Peak Charger/Discharger can charge any 2 to 40 cell Nicad or NiMH pack, from 50 mahr cells to 9,000 mahr cells. The 112 can also discharge packs and measure milliamp-hour capacity. Works from 12VDC. Includes matching connector!
The InvenSense MPU-6050 sensor contains an accelerometer and a gyroscope in a single chip. It is very accurate, this sensor is used in self balancing robots, drones, smartphones, etc. The sensor uses the I2C-bus to interface with microcontroller.