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Section 3 ... Battery
Battery Recharging Operation
§ The Extech Printers features an internal fast battery recharge system. This system is
designed to fast charge the battery cartridges in 90 minutes using 120V/9VDC/1.0A
power adapter (PN# 152120). This adapter is designed for North American use. Both
220V (PN# 152320) and 240V (PN# 152340) versions are available for international use.
§ The battery voltage, temperature and maximum charge time are monitored during battery
recharge cycle.
Initiating Fast-Charge
§ The battery Fast-charge is initiated, when the power adapter is applied to the printer.
§ The battery's voltage and temperature are checked by the fast-charge controller before the
start of the fast recharge process.
§ If the battery voltage or the temperature is outside of the fast-charge limits, the charger
defaults to trickle charge at C/64 rate.
§ If the battery voltage and the temperature are valid the yellow <CHARGE> LED is
illuminated and the fast-charge at the 1C rate is initiated. The battery temperature and
voltage limits are as follows:
Ÿ Temperature: less then 50C
Ÿ Voltage: greater than 2 VDC or less than 7 VDC.
Fast-Charge Termination
§ The controller continues the fast-charge process until any one of the following charge
termination conditions are encountered:
Ÿ Peak battery pack voltage is detected.
Ÿ Recharger Timer time-out (90 minutes).
Ÿ Battery temperature greater then 50C
§ The yellow fast <CHARGE> LED is turned off at the end of the fast charge cycle and a 5
minute Top-off charge cycle is initiated. The Top-off charge cycle insures full battery
charge.
§ Pulsed trickle charge cycle follows the Top-off cycle. The battery is trickle charged at
C/64 rate.
