Brother International TD-2020 Users Guide - Page 120

Chapter 14 Rechargeable Li-ion Battery Characteristics 14 Understanding the properties of the rechargeable Li-ion battery will allow you to optimize its usage.  Using or storing the rechargeable Li-ion battery in a location exposed to high or low temperatures may accelerate its deterioration. In particular, using a rechargeable Li-ion battery with a high charge (charged 90% or more) in a location exposed to high temperatures will considerably accelerate battery deterioration.  Using the printer while the rechargeable Li-ion battery is installed and being charged may accelerate the battery's deterioration. When using the printer with the rechargeable Li-ion battery installed, disconnect the AC adapter.  If the printer will not be used for a long period of time, remove the rechargeable Li-ion battery from the printer when its charge is 50% or less, and then store the battery in a cool place away from direct sunlight.  If the rechargeable Li-ion battery will not be used for a long period of time, we recommend charging it every 6 months.  For other precautions, refer to the instruction manual included with the rechargeable Li-ion battery. Battery Level of the Rechargeable Battery 14 The following number of pages can be printed, depending on the battery level. Battery level: Full Battery level: Half Battery level: Low Requires charging Approximately 1 roll Approximately 1/2 roll Printing cannot be guaranteed. Further use of the printer may cause it to run out of power, even while printing.  Tested at 73.4 F (23 C) using Brother's print test data 2.25" (57 mm)  656.2 ft (200 m) (1 roll), 9 % coverage  During continuous printing when connected by USB and using a new, fully charged battery However, the details listed above cannot be guaranteed since they differ depending on printing condition, operating environment and battery deterioration. 114