Sealed the hole with epoxy. Yesterday I was in a thermal bath and a steam sauna (are these the correct terms, google?) and battery dropped during these 2 hours from 100 to 90%.
The battery curve looks alright afterwards, so I guess it's water proof now.
If by that you mean a bath with hot, mineral rich water ... Don't ... I wrecked a G-Shock back in the day by doing that. The minerals are death to all the seals making any water-tightness! Sauna should be ok thought, thats just a room with high humidity.
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Sealed the hole with epoxy. Yesterday I was in a thermal bath and a steam sauna (are these the correct terms, google?) and battery dropped during these 2 hours from 100 to 90%.
The battery curve looks alright afterwards, so I guess it's water proof now.