The Samsung Galaxy A51 is expected to arrive soon as it has already bagged certifications from the Wi-Fi Alliance and Bureau of Indian Standards (BIS), and its support page also went live on the company's official Russian site. The Galaxy A51 is rumored to ship with a 4,000 mAh battery, and while Samsung hasn't officially revealed any details about the A51 yet, a certification from the South Korean government's research institute reveals the smartphone will, indeed, pack a 4,000 mAh cell which is the same size as the Galaxy A50 and A50s' batteries. Leaked render of Samsung Galaxy...
Source: https://www.gsmarena.com/samsung_galaxy_a51_specs_battery_size-news-40134.php