![Unitech PA500IIBTG User Manual Download Page 8](http://html1.mh-extra.com/html/unitech/pa500iibtg/pa500iibtg_user-manual_4025034008.webp)
vi
Copyright 2011 unitech Electronics Co., Ltd. All rights reserved. unitech is a registered trademark of unitech Electronics Co., Ltd.
Battery charge notice
It is important to consider the environment temperature whenever the
Lithium-Ion battery pack is charged. Charging is most efficient at normal room
temperature or in a slightly cooler environment. It is essential that batteries are
charged within the stated range of 0°C to 40°C. Charging batteries outside of
the specified range could damage the batteries and shorten their charging life
cycle.
CAUTION!
Do not charge batteries at a temperature lower than 0°C, which will
increase the internal resistance to cause heat and make the
batteries unstable and unsafe. Please use a battery
temperature-detecting device for a charger to ensure a safe
charging temperature range. Further, to protect and avoid battery
from inflating, the battery is detected for thermal protection and will
not be charged when the temperature of battery is over 50
degrees.