Group Four Transducers
22 Deer Park Drive,
E. Longmeadow, MA 01028
www.groupfourtransducers.com
Phone : (800) 419 1444
Fax : (413) 525 -6182
sales@group-4.com
Rev 0
20
7.
Accessories
7.1 Battery Charger
The device is 4 stages smart battery charger by Microprocessor controlled with solid 4 LEDs charging
indicator.
4 Stage Charging Process
Stage 1: Pre-charge the battery through small current, Charger enters this stage if it detects battery
deep discharge. It is helpful for battery cycle Life. (LEDs: 1 ON, 2-4 OFF)
Stage 2: Bulk charge using charger highest rated current for the type of battery in use until it reaches
80% capacity. (LEDs: 1-4 Blinking Sequentially)
Stage 3: Constant voltage, the output voltage is limited to 4.2V/Cells while current declines as the
battery charges to its full capacity without overheating. (LEDs: 1-3 ON, 4 Blinking)
Stage 4: Cut-off, at this stage, the battery is fully charged and the charger will cut-off output
automatic, that means the charger can be connected to battery left indefinitely. (LEDs: 1-4 ON)
Specification
Input: 100-240VAC@50/60Hz 0.5rms
Output: 3A
Limited Voltage: 16.8V
Cut-Off Current: 200mA
Charging mode: Fully automatic 4 stages
Suitable battery type: Lithium Ion
