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MoriPower-GBA Lithium-ion Battery Charge/Discharge Module (AXP209 Version)

Overview

The MoriPower-GBA lithium battery charge/discharge module (AXP209 version)

uses the AXP209 as the PMIC, supports ordinary polymer soft-pack lithium batteries, and outputs 3.3V to the GBA. When
the battery voltage is below 3.5V, the low battery indicator D2 will light up; during charging, the charging indicator D1 will light up.
Charging supports a C-to-C connector with a 5V input.

Note:
1. The 30mΩ resistor in the charging circuit cannot be replaced with a 0Ω resistor, as this will cause overheating during charging.
2. The inductor's rated current must be above 1A.
3. If the charging indicator flashes once per second during charging, it indicates a charging malfunction; resolder the AXP209, as this is caused by a lack of proper grounding at pin 37.

Design Files

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Update:2026-03-28 08:08:59

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