PPO announced the first version of its proprietary fast charging technology with the OPPO Find 7 back in 2014. The VOOC (Voltage Open Loop Multi-step Constant-Current Charging) Flash Charge technology could charge the Find 7’s 2,800 mAh battery from 0% to 75% in 35 minutes, which was a rather impressive statistic eight years ago. 20W VOOC 2.0 found its way onto several F-series and R-series smartphones in that era, alongside being rebranded to Dash Charge for OnePlus smartphones and also being extended to Realme smartphones. One of the most important highlights of this fast charging tech was the fact that all of the heat was contained within the charging brick itself, letting the smartphone charge itself very quickly without being punished thermally