The Specialized U1-600 battery charging receptacle is normally protected with a magnetic cover.
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After the charging is done, and the charger plug removed from the receptacle, it just requires a delicate movement of a finger to make the cover flip into the place and stay there. My oldest battery has been in use for 28 months. I am a really
careless person, still the charging port covers on my three batteries stay in place.
The first generation of Vado/Como was made between 2017 and 2021. The fact you could use the same battery format for 460 or 500 or 604 Wh capacities was a concept beyond any competing system (think of varieties of Bosch or Giant batteries, compared to the single Specialized battery format). No-one can say a Specialized engineer didn't think of protecting the charging port, especially as Specialized chose the Rosenberger magnetic* plug/socket.
The OP has just had a bad luck. Accidents do happen.
Having said the above, it is necessary to mention that the Gen 2 of Vado/Como/Tero has the location of the charging port modified for their new U2 batteries, while keeping the Rosenberger system.
*) The great thing about the Rosenberger plug is that if you incidentally trip over the charging cable, the plug will pop off the charging socket, with no damage to either the bike or the charger.