Android 15 system will redefine the 'fast charging' standard: from 7.5W to 20W

IT House News on June 19th, in the rapidly developing smartphone market, charging speed has become one of the key selling points for mobile phone manufacturers. In order to stand out in the fierce competition, manufacturers continue to break through the bottleneck of fast charging technology, and the charging power of some mobile phones has reached an astonishing 240W. However, the current way the native Android system (AOSP) labels charging speed confuses users.

According to IT House’s understanding, the current method for determining charging speed in native Android systems is very simple. Through the health HAL, the system can obtain information such as current and voltage from the battery and charging circuit. When the calculated charging power (current multiplied by voltage) is less than 5W, the charger will be marked as a "slow charger" and the lock screen will also display a "slow charging" prompt. Chargers with a power higher than 7.5W are classified as "fast chargers", and the words "Fast Charging" will be displayed on the lock screen. Chargers between 5W and 7.5W are classified as "ordinary chargers", and the lock screen will only display "Charging".

That is, any charger with a power of 7.5W or above is labeled as "fast charging" in the native Android system. This broad definition covers a very wide range of charging speeds, making it difficult for users to tell the difference between a regular charger and a true high-power charger, often leading to unrealistic expectations for charging speeds.

The above is the default charging speed standard for Android’s native system. Although mobile phone manufacturers can make adjustments, Google’s own Pixel series of mobile phones have always used this standard.

The good news is that Google plans to fix this issue in the upcoming Android 15 update. In the latest Android 15 beta update, Google added a new configuration called "config_chargingFastThreshold_v2" with a value of 20000000, or 20W, which increases the "fast charging" power threshold from 7.5W to 20W.

In general, this is just a minor change, because other mobile phone manufacturers can already adjust their own criteria. It’s unclear how many manufacturers have made such adjustments, but Google’s own Pixel series of phones clearly haven’t. Once Android 15 updates the charging speed criteria, Pixel owners will have a clearer idea of ​​which chargers will give their phones a faster charging experience on the go.

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