Wheelchair USB Charger Comparison

If you use a power wheelchair, you are sitting on 24 V of battery that can be used to do more than just drive your power chair. Why not use it to charge your USB device. But as can be seen in this video, some of the more popular devices cannot handle the requirements of the modern smartphone. This video compares several popular models. Although it was done by a manufacturer who concludes that his are among the top choices, he justifies his claims with hard data and challenges anyone to come up with better solutions. Such a charger can be a vital piece of assistive technology so this is important to that community.