The Oppo Reno 3 Pro comes with a 4035 mAh battery, which again, is good, but not the best in class. The Realme 6 being cheaper, still features a 4300 mAh battery, so the least Oppo could have done is bundled that into the Reno 3 Pro as well. But coming to the general battery life, 4000 mAh is now the sweet spot, and anything that is more than that is considered to be adequate for a smartphone today. The Oppo Reno 3 pro will last you a whole day on heavy use, plus thanks to the 30W VOOC fast charger, you can charge your phone to 65 percent in just 30 minutes.Oppo has been one of the pioneers of fast charging and that is on beautiful display here as well.