1 Scope

1.1 These requirements cover power banks, sometimes also known as portable USB chargers or portable back-up battery power, which are standalone devices that incorporate primary or secondary batteries for mobile powering of low voltage electronic devices.

1.2 These requirements cover products with the following power characteristics:

1. a) Input:

   1. 1) Supplied by isolated dc power source rated maximum 60 Vdc; or

   2. 2) Supplied by ac mains power source, through direct plug-in construction.

2. b) Output: Provides dc output(s) rated maximum 60 Vdc; and

3. c) The watt-hour rating of the power bank does not exceed 100 Wh.

Summary of Topics

This revision of ANSI/CAN/UL 2056 dated June 30, 2026 includes the following changes:

– Updates to the flammability requirement of internal parts: 6.1.5

– Clarification of the test method in the Short-Circuit of Output Port Test: 12.3

– Correction of the limits of cell temperatures in the Electrical Tests: 12.3A, 12.7, 12.8, 12.9, 12.10, 13.2A, 13.3A, 13.5, 14.5A, 14.7, and 18.5

– Clarification of the test condition and the tolerance of metal rods in the Flexing Force Test: Figure 23.1

– Alignment of the oven temperature tolerance in the Mold Stress Relief Test: 24.1

– Update the structural requirement for Direct plug-in construction: 6.7.1(c)

– Clarification of the test methods in the Abnormal Charging of the Battery Test: 13.2 and 13.4

– Clarification of the test method in the Temperature Test and BMS Verification: Exception to 16.5