The best replacement for usb charger is wall charger.

The best alternatives to usb charger are rated as following:
★★★★★  wall charger
★  ac charger
★  wall charger iphone

Your alternative for usb charger is not listed? Suggest!
Speaking about usb charger, one probably shouldn't forget about receptacle.

Other search terms related to usb charger and their ratings are:
★★★★★ receptacle
★★ battery
★ adapter
You have in mind a companion for usb charger and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of usb charger in all years. Click on graph for more.
usb charger
wall charger
ac charger