- Check total wattage against how many ports you’ll actually use at once, not just the headline number
- Confirm it supports your phone’s specific fast-charging standard, not just a generic ‘fast charging’ claim
- Cheap car chargers are a common source of electrical noise that can interfere with radio or Bluetooth audio — a certified charger avoids this more reliably
How Charging Speed Is Tested and Advertised — and Why Real-World Results Vary
Manufacturer-advertised charging times are typically measured in controlled lab conditions with an empty battery and ideal temperature — real-world results…