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27. Dezember 2024 09:52
@hendrik hello，pls tell me exact battery modle name，and you mean battery fan is running steadily？
27. Dezember 2024 10:00
@spoge hello，To upgrade the battery, you need to use an RS485 to USB converter and make an upgrade cable yourself. If your system is working properly, it is okay not to upgrade the battery.
If you still want to upgrade, please contact my whatsapp: +86 18022876286 or email: support@felicityess.com
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