  ZigBee network technology has been used widely in different commercial,
medical and industrial applications, and the importance of keeping the network
operating at a longer time was the main objective of ZigBee manufacturers. In
this paper, ZigBee battery characteristics and operation has been researched
extensively and a mathematical modeling has been applied on existed practical
data provided by Freescale semiconductors Inc [1], and Farnell [2]. As a result
a mathematical optimized formula has been established which describes battery
characteristic and voltage behavior as a function of time, and since ZigBee
node batteries has been the core objective of this research work, a decline in
battery voltage below 50% of battery capacity could influence and degrade
ZigBee network performance.
