As a result I had to stay very late at the office in order to get enough charge in to get home. (evo.co.uk)
It ensures that there is enough charge left when I wake up. (iphonehacks.com)
Instead of needing an external battery source or some kind of remote charger, the microchip gets enough charge from the microchip reader to be able to send out its information to the reader. (blog.pawedin.com)