VeriFone VX 685 GPRS, Installation Manual

Page: 52 / 56

B
ATTERY
I
NFORMATION
Battery Specific Terms and Definitions
52
VX 685/VX 690 I
NSTALLATION
G
UIDE
Should I charge the battery before putting it into storage?
It is advisable to store the battery with a 40% charge. However, storing the battery
in a cool place is more important than the state of charge. Make sure the battery is
not fully depleted before storage otherwise, the safety/protection circuit may trip.
Will the battery heat up during charging?
It is normal for the battery to emit a small amount of heat during charging. The
battery is equipped with a temperature sensor that will disrupt the flow of charge
current when extreme temperature levels are detected.
Battery Specific
Terms and
Definitions
The following terms and definitions apply to the terminal’s battery.
Percent of Charge (%)
The ratio of the RC (remaining charge) value to the FC (full charge = 2450 mAh)
value multiplied by 100%. The range is from 0 to 100.
The Percent of Change value is available to terminal applications via OS calls. It is
updated every 20 seconds.
Remaining Charge (RC)
The amount of usable energy in the battery at a given time in mAh. The OS writes
RC=FC at the end of charge. The range is from 0 to FC.
The RC value is available to terminal applications via OS calls. It is updated every
20 seconds.
Safety/Protection Circuit
The terminal is equipped with a safety/protection circuit that protects the terminal
from damage. For more information, see
Safety/Protection Circuit .
Voltage
Under system load, the terminal reports battery pack voltage. The range is from
3 V to 4.2 V. It is updated every 20 seconds.
General Battery
Terms and
Definitions
The following terms and definitions apply to most battery types, in general.
Ampere-hour, Amp-hour (Ah)
A unit of electrical energy. It is the specified current flowing for one hour. Two
ampere-hour is two amps of current flowing for one hour.
NOTE
The recommended operating temperature for the terminal is from 0
°
C to 50
°
C
(32
°
F to 122
°
F).