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Lithium Ion UPS Battery Versus VRLA Battery
           
  Units
 Yuasa
Battery
NP 7-12
 Gaia Lithium
Cells
UHP3414
ONCA
General Data
     7
Capacity 10H Rating
 AH
 7
 7
Nominal Cell Voltage
 Volt
 2
 3.6
Cell Weight
 gram
 440
 320
Cell Volume
 cu.cm
 160
 130
Total UPS Battery
 Cells
 240
 133
UPS Battery weight
 kg
 106
 55
UPS Battery Volume
 Liters
 38
 22
Battery Voltage Maximum ( Float
Regime)
 Volt
 540
 546
Battery Voltage Minimum
 Volt
 384
 351
Discharge Current Maximim
 Ampere
 35
 150
       
Backup Time
      
Discharge Time at 3C ( 21A)
 minutes
 5
 18
Discharge Time at 2C ( 14A)
 minutes
 15
 27
Discharge Time at 1C ( 7A)
 minutes
 40
 54
Discharge Time at 0.3C (2A)
 minutes
 180
 210
       
Temperature Dependance
      
Discharge capacity at -20 ºC
 %
 62
 60
Discharge capacity at 0 ºC
 %
 85
 90
Discharge capacity at + 20 ºC
 %
 100
 100
Discharge capacity at +40 ºC
 %
 108
 110
       
Cycles at 20 ºC to 80% Capacity  
      
Number of cycles to 100% discharge
 Cycles
 150
 1000
Number of cycles to 50% discharge
 Cycles
 430
 8000
Number of Cycles to 30% discharge
 Cycles
 1200
 30000
       
Operating Temperature
      
Charging
 ºC
 -15 to + 50
 -30 to + 60
Discharging
 ºC
 -15 to +60
 -30 to + 60
Storage
 ºC
 -20 to +50
 -40 to +60
       
Storage
      
Storage Time before charging
 Months
 6 to 9
 6 to 12
Self discharge to 50%C at 20ºC
 Months
 17
 10
Selfe discharge to 50%C at 40ºC
 Months
 5
 5
       
Life Expectancy
      
Float regime at 20ºC to 80% Capacity
 Years
 3 to 5
 9 to 10
Float regime at 30ºC to 80% Capacity
 Years
 1.5 to 2.5
 4.5 to 5
Float regime at 40ºC to 80% Capacity
 Years
 0.75 to 1.25
 2.25 to 2.5
       
* Weight and Volume of Li- Ion UPS battery includes 30% packing allowance.
Lithium Ion batteries are lately preferred over lead acid , based on longer lifetime, increased
backup time and environment friendliness. Until now Li Ion Batteries, although widely used
in portable electronics, didn't penetrate the UPS market due to flammability concerns. This
issue is now mitigated by introduction of internal battery protection circuits.  

The following table enables to compare the  performance of  a Three phase 480V 10kW
UPS  Lead Acid VRLA  battery bank with equivalent bank using Li Ion Cells.
For more insight and additional aspects  including Hazards and cost consideration see:
Pros and Cons of Li Ion UPS Batteries.