The exposed copper will oxidize over time. The datasheet never mentions this, but conformal coating or simply accepting the board as a consumable part of your garden project is the way to go.
Due to its 3A current capability and wide voltage range, the HW-133 v1.0 is frequently found in: Hw-133-v1.0 Datasheet
: At roughly the size of a fingernail, it is ideal for space-constrained projects like drone builds or portable IoT devices. The exposed copper will oxidize over time
The datasheet implies you have two separate boards: Hw-133-v1.0 Datasheet
Have you used the HW-133 in a unique project? Let us know in the comments below!
Experimental testing highlights several interesting characteristics that distinguish its practical use from basic paper specifications: