Anker
Not all power adapters are the same.
In recent years, phones have been built to accommodate significantly more powerful adapters. Third-party adapters like this dual-port charger from Anker deliver 24 watts compared to the usual 12, so upgrading to a newer adapter can greatly enhance your charge time.
But even just using the charger that came with your phone can help. If you plug your phone into an older power adapter, like one that came with an older phone, it might deliver significantly less power and slow down the charging process.
Bottom line: throw away your oldest power adapters, use the latest one that came with your current phone, and for best results, consider upgrading to a fast-charge adapter.