I have an XBee transmitter: XBee 1mW Wire Antenna - Series 1 (802.15.4) - WRL-08665 - SparkFun Electronics specs are:
3.3V @ 50mA
250kbps Max data rate
1mW output (+0dBm)
and a co2 sensor: http://www.co2meter.com/products/cozir-0-2-co2-sensor specs state:
Power Input: 3.3-5.5VDC (3.3V recommended)
33mA peak, 1.5mA avg power requirements
The sensor is running in streaming mode which states in the manual that the power consumption is 3.5mW in this mode.
I have this battery: Lithium Ion Battery - 2Ah - PRT-13855 - SparkFun Electronics specs are:
Each cells outputs a nominal 3.7V at 2000mAh!
Can i just wire a splitter to both my devices from this one battery to power both?
How do I step the voltage down to 3.3 from 3.7?
How do I calculate how long I would expect this battery to keep things powered based on the power consumptions listed above?