Brother QL-810W Ultra-Fast Label Printer with Wireless Networking - Manual (Page 211)

Using the Optional Battery Unit (Rechargeable Li-ion Battery included)
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Discontinue charging the Battery Unit
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To stop charging the Battery Unit, disconnect the AC Adapter.
Notes on Using the Battery Unit
• Before use, fully charge the Battery Unit. Do not use it until it is fully charged.
• Charge the Battery Unit in environments between 50°F and 95°F (10°C and 35°C), otherwise the Battery
Unit will not charge. If the charging stops because the environment temperature is too low or too high,
place the Label Printer in environment between 50°F and 95°F (10°C and 35°C) and try charging again.
• If the Label Printer is used to print, feed, or perform another operation when both the battery is installed
and the AC Adapter is connected, the charging may stop even if the battery is not fully charged. When
the operation to the printer stops, the battery continue to charge.
• For QL-820NWB, the condition of Battery Unit can be checked from the LCD.
Battery Unit Characteristics
To ensure the best performance and longest life from the Battery Unit:
• Do not use or store the Battery Unit in a location exposed to extreme high or low temperatures as it may
discharge more quickly. This may happen when using a Battery Unit with a high charge (90% charged
or more) in a location exposed to high temperatures.
• Remove the Battery Unit when storing the Label Printer for a long period of time.
• Store a Battery Unit with a less than 50% charge in a cool dry place out of direct sunlight.
• Recharge the Battery Unit every six months if it is stored for a long period of time.
• If you touch a part of the Label Printer while the Battery Unit is charging, that part of the Label Printer
may feel warm. This is normal, and the Label Printer may be used safely; however, if the Label Printer
becomes extremely hot, discontinue use and allow to cool.