2. A power-factor-correction (PFC) front end is usually a boost converter that can draw current from the ac input for all of the input cycle. In addition to the need for rectification in an ac-dc ...

DJI has announced its new Power 2000 portable power station with superfast charging and numerous AC and DC USB power outlets.

Shipped in a smart zipped case, the RAVPower 27,000mAh power bank is shipped with an AC charger (this cannot be recharged using a USB charger, and requires a DC 19V/1.6A adapter), a couple of USB ...