User's Manual

RT System 2 v2.3 138 Deployment Guide R01.i

7. Batteries

See “Batteries” on page 194 for the French translation of this chapter.

Voir “Batteries” sur la page 194 pour la traduction française de ce chapitre.

This chapter provides information about the batteries and battery requirements used in

the Wireless Seismic, Inc. RT System 2.

7.1 Lithium Ion Batteries

This section provides information regarding the characteristics, use, and handling of

lithium ion batteries. See the following sections for details:

i “Specifications” on page 138

i “Handling and Safety Guidelines” on page 139

i “Transportation” on page 140

i “Storage” on page 141

7.1.1 Specifications

The RT System 2 uses one or two custom intelligent lithium-ion batteries with self-

contained charging circuitry that protects the batteries from overcharge, discharge,

short circuits, or extreme temperature charging.

Battery specifications are shown in the following table:

Table 7–1 Lithium Ion Battery Specifications

Item Description Value

Voltage Nominal 3.7 VDC

Shut-off 2.8 VDC

Full (90%) charge 4.1 VDC

Overcharge Voltage 4.28 VDC

Over Discharge Voltage 2.80 VDC

Current Maximum Charge Current 2 A

Consumption Active Mode 4.2 mA maximum

Consumption Sleep Mode 66 PA maximum

Full (90%) charge mAh Approximately 12,000 mAh at

nominal voltage

—

Full (90%) charge mWh Approximately 44,400 mWh

at nominal voltage

—

Capacity 48.8 Watt hours