The idea behind Open Solar mote is to use it as a greenhouse monitoring node. A LIPO battery was used. Now LIPO's require constant current for fast charging. This means that the battery can only get recharged when the solar panel is exposed to sun.
Some calculations follow:
•Imax = 100.38 mA (Approximate current draw by the system, worst case) •System wakes 60 times an hour •127.5 mAh battery capacity (accounting for leakage)
24((〖Active Cycle〗_( per hour)×100.38 mA)+(〖Sleep Cycle〗_( per hour)×455 nA))=0.8131 mA/Day
Life expectancy=(127.5 mAh)/(Daily Consumption)=157 days
This is without recharging.