We've been playing with an Arduino Duemilanove + XBee. Works lovely, BUT... now we'd like to use a battery on the board instead of a fixed power supply. I don't know much about electronics, but it seems that the current setup of the board requires ~85 mA. According to the one who checked this, a battery would only last for about 2 weeks... Without the XBee it still requires ~25 mA.
My question is how to optimize this? As for the setup: - An XBee shield is connected with a XBee Pro, 60 mW wire antenna - Board transmits a small packet of data each second - A button kinda like sensor is connected to the Arduino 5Volt. It makes or breaks contact with a digital input on the same board. A 10 kOhm resistor is connected between that pin and the ground to prevent "floating" signals. - No other I/O or external components used - 9 Volt adapter net supply has been used
Ideas? Using a weaker antenna, running on 3.3 Volt...? Thanks! Rick