The official chargers for Apple Watch and Galaxy Watch are certainly the preferred charging solution, but data cables can be a problem. Mobfree is crowdfunding a three-in-one dual-sided watch charger that might be a good charging solution for travel.
This 3-in-1 dual-sided watch charger is closer to a USB-C connector, so you can simply plug it into your laptop’s USB-C slot and charge it. If you have a GaN charger with a USB-C slot at home, you can also plug it in.
This 3-in-1 reversible watch charger supports Apple Watch (2nd generation through 8th generation, and later) and Samsung Watch (1st generation through 5th generation, and later).
The 3-in-1 dual-sided watch charger is clearly marked so that one side can be used to charge the Apple Watch while the other side is used to charge the Samsung Watch.
Mobfree 3-in-1 dual-sided wireless watch charger is currently being crowdfunded on Kickstarter for an early bird price of $20 (currently about RMB 135) and will ship around June 2023.