Samsung is already preparing for the launch of the Galaxy S11 series that traditionally sets place in February (four months from now). The SafetyKorea website has just released a certification for a battery with the model number EB-BG980ABY, which is meant to go in a Samsung phone with model number G980. The Galaxy S10e was SM-G970, so logic leads us to the Galaxy S11e being SM-G980. There is also a photo of the battery, and despite the poor quality of the image, we can see it is rated at 14.36 Wh. Given that a battery operates at 3.85V, we are looking at a 3,730 mAh...
Source: https://www.gsmarena.com/samsung_galaxy_s11_smartphone_certified_with_3730_mah_battery-news-39990.php