Specifications 25 
Battery runtime 
 
Load, percent  Load, watts  Estimated battery runtime at 100% battery charge 
20 100 45 minutes 
50 250 15 minutes 
80 400 6 minutes 
100 500  4.6 minutes 
 
 
Environmental specifications 
 
Feature Specification 
Operating temperature 
10°C to 40°C (50°F to 104°F); UL-tested at 25°C 
(77°F) 
Nonoperating 
temperature 
-25°C to 55°C (-13°F to 131°F) 
Relative humidity  20% to 80%; noncondensing 
Operating altitude  Up to 2,000 m (6,600 ft) above sea level 
Nonoperating altitude  Up to 15,000 m (49,212 ft) above sea level 
Audible noise  Less than 45 dBA, normal operation 
Less than 50 dBA, on battery power