Unitech HT630 Reference Guide

Copyright 2008 Unitech Electronics Co., Ltd. All rights reserved. Unitech is a registered trademark of Unitech Electronics Co., Ltd.
19
Recharging the Battery
When the terminal shows the “Main Battery Low” message, the battery needs to be
recharged (See ‘Charging the Battery’ in Chapter 1 of this manual). When the battery
is fully charged, the LED light will turn green. Charging time typically takes two to three
hours.
Charging Consideration
It is important to consider the temperature when charging the Lithium-Ion battery pack.
The charging process is most efcient at normal room temperatures or slightly cooler.
It is essential to charge the battery within the stated range of 32°F to 113°F (0°C to
45°C). Charging the battery outside of the specied range could damage the battery
and shorten its life cycle.
Effects of Overcharging Batteries
Overcharging may occur when a Lithium-Ion rechargeable battery is continually
charged for extended periods after it has reached full charge capacity. For example,
a battery left to charge for several weeks may appear to have minimal capacity. This
type of failure can be remedied by completely depleting the battery of power and then
recharging it to full capacity.
This condition can be prevented by immediately unplugging the power cable when
the unit reaches full charge, or by using the cradle to charge the batteries. The cradle
starts the charge process in Quick Charge Mode and switches to Trickle Charge Mode
when it detects the battery is fully charged. There is no risk of overcharging in Trickle
Charge Mode.
Storage and Safety Precautions
Batteries should be stored where there is no risk of accidental shortage or other
damage. Although charged Lithium-Ion batteries may be left unused for several
months, their capacity may be reduced due to back up and internal resistance. If this
happens, they will require recharging prior to use. Lithium-Ion batteries may be stored
at temperatures between -4°F and 158°F (-20°C to 70°C).

Unitech HT630 Specifications

General

Display diagonal	- \
Display resolution	128 x 64 pixels
Display number of colors	Monochrome
ROM capacity	0.256 MB
Internal memory	0.0005 GB
Internal memory type	RAM
Compatible memory cards	Not supported
Maximum internal memory	4.5 MB
Processor family	-
Processor frequency	0.8 GHz
Interface	RS-232
Storage temperature (T-T)	0 - 50 °C
Operating temperature (T-T)	-20 - 70 °C
Operating relative humidity (H-H)	5 - 95 %
Battery capacity	120 mAh
Battery life (max)	12 h
Battery recharge time (off)	2.5 h
Certification	BSMI, CCC, CE, FCC, VCCI, RoHS
Product color	Blue
Barcode reader	Yes
Keyboard layout	Alphanumeric
Keypad number of keys	27

Weight and Dimensions

Depth	35.1 mm
Width	67.1 mm
Height	167.64 mm
Weight	243.81 g