NCR 7458 - Manual (Page 74)

3-50 Chapter 3: Hardware Service
Battery Performance
Application:
Transaction Ride-Through. The battery supports
full operation of the POS terminal and peripherals.
Power Draw from
Battery
Maximum: 428 W (300 W DC output power and
70% efficiency)
UPS Conversion
Efficiency:
70% min, 75% typical
Battery Support Time:
1-30 minutes
Battery Current Draw:
16.5A max at 20V battery voltage
Battery Voltage:
24 V nominal
Battery Capacity
4.0 Ah
Battery Chemistry:
Lead acid, starved electrolyte
Deep Discharge
Voltage:
18.0V min , 18.6V typical, 19.2V max (battery
disconnect)
Battery Low Voltage:
21.0V min, 22.2V max
Battery Current Drain
(after deep discharge
cutoff):
100uA max
Lifetime:
3-5 years