GRAPHTEC GL820 - Charging the Battery

2−14
CHAPTER 2 Checks and Preparation
Charging the Battery
Expected time required for charging: ● battery pack x 1: approx. 4 hours
● battery pack x 2: approx. 8 hours
The battery pack is charged by mounting it in the GL820, attaching AC adapter to the GL820.
(1) Mount the battery pack in the GL820 (see the previous section for the mounting procedure).
(2) Turn on the power to the GL820. (Please see Section 2.4, “Connecting the Power Cable andTurning on
the Power”).
(3) The CHARGE LED lights.
CHARGE LED
 • GL820isequippedwithatemperature monitor function which starts automatic charging as soon as
it is cooled down. Therefore, depending on the internal temperature, charging may not be performed
immediately.
 • WhenchargingisattemptedwhilethepowerisON,chargingmaynotbeperformedimmediatelyeven
if the temperature environment conforms to the specification. In such a case, set the Screen Saver
settings to ON or perform charging while the power is OFF.
 • IfinputisbeingmadedirectlyfromtheDCpowersupplyinsteadoftheACadapter,chargingwillnotbe
performed when the DC voltage is about 16 V or less.
 • Theoperatingtemperaturerangeduringchargeisfrom15to35°C.