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ACR321 - User Manual
Version 1.00
Page 6 of 11
www.acs.com.hk
3.2. Battery
A rechargeable Li-ion battery supplies energy to the device once the external power source
cannot supply power to the device. So, transactions can still be processed even the power
supply of the bus is out of order. The battery locates at back of the device. In order to change the
battery, turn the screw in the circle in the figure below to left to remove the battery cover. Follow
the direction of the red arrow to take away the cover.
Then, unplug the battery and a new battery can be replaced in the carrier.
The battery is recharged once the external power source resumes supplying power to the device.
