红水杯

Romans LT20 power bank modification board V3.1

Overview

2 USB A port outputs, 1 USB C port input/output, any port supports fast charging (simultaneous charge and discharge are not supported, the output port will be closed during charging) output parameters 5V-3.1A, 7V-2.4A , 9V-2A, 12V-1.5A. The output current of the boost system automatically adjusts with temperature changes. The maximum charging current at the battery end can reach 5A, and the charging efficiency is up to 94%.

LT20 is designed with snaps and cannot be disassembled without damage. Gluing is required to put it back together.

The schematic diagram and PCB may not be displayed properly, just open them and view them directly

Design Files

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Update:2025-08-06 05:30:49

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