Earlier this month, Apple released a 14.3 software update for the HomePod and HomePod mini, and it has since been discovered that this update allows the HomePod mini to be powered by select 18W chargers.
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As noted in a Reddit thread spotted by The 8-bit, and confirmed by MacRumors, the HomePod mini now works with Apple’s proprietary 18W USB-C power adapter and select third-party 18W power adapters from brands like Aukey. One user was even able to power the HomePod mini with an 18W battery from Cygnett, making it portable.
Previously, when you tried to use the HomePod mini with a power adapter less than 20W, the speaker simply displayed an amber light and would not function. This may still be the case with certain 18W power adapters as certain nutrient profiles may be required.
Apple ships a 20W power adapter with the HomePod mini, but many customers may have an 18W power adapter from an iPhone 11 Pro or other device.
To check if your HomePod mini is running the 14.3 software update, open the Home app on an iPhone, tap the house icon in the top left corner, tap Home Settings, then tap Software Update. HomePod software updates will be installed automatically unless the feature is disabled, but updates can also be installed manually.