The Lipo Rider Plus from Seeed is not only a Fast Charger but also a Strong PowerBoost, supports up to 5V/2A charging current, boost output integration, output up to 5V/2.4A, can also output 3.3V /250mA.
Grove - DHT20 Temperature & Humidity Sensor is the newly released version, an upgraded version of the DHT11. It’s a high quality, low-cost digital temperature, and humidity sensor.
Grove – MOSFET enables you to control higher voltage project, say 15VDC, with low voltage, say 5V, on microcontroller. MOSFET is also a kind of switch, but its switching frequency can reach up to 5MHz, much faster than normal mechanical relay.