Notable Vx 680 Battery Specifications; Safety/Protection Circuit; Cell Temperature Monitoring; Esd Protection - VeriFone VX 680 Reference Manual

VX 680 S B I
MART ATTERY

Notable VX 680 Battery Specifications

Notable VX 680
Battery
Specifications
Safety/Protection
Circuit
Cell Temperature
Monitoring

ESD Protection

Trip Recovery

NOTE
174
VX 680 R
EFERENCE
NFORMATION
Storage Precautions
•
Do not fully charge batteries before storage. Instead, keep the batteries
partially charge before storing them, then charge them fully before actual
usage.
•
Do not store batteries when they are fully depleted. If a battery is empty,
charge it for 30 minutes 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. In addition, always check the date when the batteries were
manufactured.
The Smart Battery is designed to offer optimum protection to the VX 680 terminals
and their users.
The Smart 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 4.35V.
•
Prevents cell voltage from dropping too low during discharge – a field effect
transistor (FET) opens if voltage in any cell reaches 2.75V.
•
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 2A or
when the discharge current exceeds 3.6A. This prevents damage caused by
shorting the battery contacts.
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 60 C or falls below 0
Electrostatic discharge (ESD) protection: ±8KV air discharge, ±4KV contact
discharge
The VX 680 Smart battery features a trip recovery system, which resolves faulty
or hazardous conditions that led to a safety trip. Application of current through the
charger will reset the safety circuit.
The RC (remaining charge) value will be 0. The charge must be completed for
the OS to rewrite the RC value.
G
UIDE
°
C.