VeriFone VX 685 GPRS, Installation Manual

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B
ATTERY
I
NFORMATION
Notable Battery Specifications
VX 685/VX 690 I
NSTALLATION
G
UIDE
51
•
Do not store batteries when they are fully depleted. Charge an empty battery
for at least one hour before storage. When a depleted battery self discharges,
it may become unusable.
•
Do not stock pile batteries. Avoid buying dated battery stocks even at reduced
prices. Always check the date when the batteries were manufactured.
Notable Battery
Specifications
The battery is designed to offer optimum protection to the terminals and their
users.
Safety/Protection
Circuit
The battery features a safety/protection circuit that provides the following benefits:
•
Limits the peak voltage in each cell during charging – a field effect transistor
(FET) opens if voltage level in any cell reaches 4.28 V.
•
Prevents cell voltage from dropping too low during discharge – a field effect
transistor (FET) opens if voltage in any cell reaches 2.3 V.
•
Limits the current going in and coming out of the battery pack. A field effect
transistor (FET) opens the current path when charge current exceeds 6.5 A or
when the discharge current exceeds 7 A. This prevents damage caused by
shorting the battery contacts.
Cell Temperature
Monitoring
A discrete thermistor is built into the battery pack to prevent cell or terminal
damage during charging. The terminal’s OS monitors the cell temperature using
the thermistor and automatically shuts down the charger if the temperature
exceeds 50
°
C or falls below 0
°
C.
ESD Protection Electrostatic discharge (ESD) protection: ±8 KV air discharge, ±4 KV contact
discharge
Trip Recovery The battery features a trip recovery system, which resolves faulty or hazardous
conditions that led to a safety trip. Application of current through the charger
resets the safety circuit.
Battery FAQs Should I allow the battery to discharge completely before charging?
No. It is better to recharge the battery often and avoid frequent full discharge.
However, allow a full discharge once a month to enable reset.
Should I charge the battery partially or fully?
It does not matter whether you charge the battery fully or partially. Charging a full
battery will not harm the battery.
WARNING Do not dispose of batteries in a fire. Lithium-ion batteries must be
recycled or disposed of properly. Do not dispose of Lithium-ion
batteries in municipal waste sites.