Specifications  61 
Battery specifications 
  
Feature  Specification 
Type 
12 V, 5 AH, sealed, maintenance-free, rechargeable, valve 
regulated lead-acid batteries with a 3-5 year service life at 
25°C (77°F). 
Voltage  The battery modules have a battery string voltage of 120 V. 
Charging 
Complete charge takes no more than 48 hours. After 
approximately 3 hours, the batteries reach 80% charge at 
default nominal utility voltage and no load. 
 
 
High-voltage UPS battery runtimes 
  
Load, percent 
Estimated battery 
runtime 
Runtime with one ERM  Runtime with two ERMs 
20  40 minutes  125 minutes  225 minutes 
50  12 minutes  50 minutes  89 minutes 
80  6 minutes  30 minutes  54 minutes 
100  4 minutes  24 minutes  43 minutes 
  
 
Low-voltage UPS battery runtimes 
  
Load, percent 
Estimated battery 
runtime 
Runtime with one ERM  Runtime with two ERMs 
20  45 minutes  142 minutes  256 minutes 
50  15.5 minutes  55 minutes  99 minutes 
80  7 minutes  34 minutes  60 minutes 
100  5 minutes  26 minutes  47 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 
-20°C to 50°C (-4°F to 122°F) 
Relative humidity  20% to 80%; noncondensing 
Operating altitude  Up to 2,000 m (6,600 ft) above sea level 
Nonoperating altitude  15,000 m (49,212 ft) above sea level 
Audible noise  Less than 45 dBA, normal operation 
Less than 50 dBA, on battery power