User guide

Rechargeable batteries have a limited number of charge cycles and may eventually need to be replaced. A

properly maintained battery can retain up to:

• 90% of its original capacity at 100 full charge and discharge cycle.

• 85% of its original capacity at 300 full charge and discharge cycle.

• 80% of its original capacity at 500 full charge and discharge cycle.

You may choose to replace your battery when it no longer holds sufficient charge to meet your needs.

We recommend replacing the battery if:

• The battery is more than 2 years old. The first 2 digits of the 4-digit serial number on the battery

represent the year of manufacture and the other 2 digits represent the date of manufacture.

• The battery is used for 17 months in an environment where the battery is charged once a day.

• The battery is used for 10 months in an environment where the battery is charged more than once a

day.

4. Troubleshooting

A weak battery can cause an error message to appear on your device. Before sending your product out for

repair, please ensure the battery is working properly. Following are some common errors that may appear on

your device:

Common Error Message

Error Message

Solution

Device is dead.

(Display is blank or the unit will not power on)

Try to cold boot the terminal first. If this does not

work, replace the battery with a known good

battery.

Battery low message is popped up or the device

goes off while booting.

The main battery is low. Please replace the

battery with fully charged one. If this leaves the

device without charging or replacing battery, the

data can be lost.