Samsung Galaxy S10 and S10+ gets certified in China, wall charger power output revealed
Rolling under the SM-G9730 and SM-G9750 codenames, the two devices will come along with a travel charger rated at 9.0V/1.67A or 5.0V/2.0A, which is very similar to the wall chargers supplied with either the Galaxy S9, S9+, and Note 9. With its Adaptive Fast Charging technology, the similarly-rated chargers of the Galaxy S9, S9+, and Note 9 did their job in the ballpark of roughly 1 hour and 40 minutes. If Samsung doesn't utilize a faster-charging technology on its next flagships, we should probably expect similar charging speeds.
As far as batteries go, rumors have it the regular S10 would feature a 3,500mAh battery, while the Galaxy S10+ is expected to come with a 4,000mAh one. As you're probably aware, Samsung is also expected to release an "entry-level" Galaxy S10 E with a 3,100mAh battery, whereas the speculated ultra high-end, 5G-enabled Galaxy S10 is likely coming along with a very large 5,000mAh tank.