The ST-Link method is usually employed when you need to downgrade or update the DRV firmware to versions not supported by mobile apps. You would connect an ST-Link programmer to your scooter's control board and use specific software to update or downgrade the DRV firmware.
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Since the original battery uses Samsung 50e cells and is 48V, it's important to ensure that any modifications or replacements you make are compatible in terms of voltage, capacity, and cell type. among us