If you find that charging your USB-chargeable devices takes too long, you may be interested in the ChargeDr USB Charge Booster from Digital Innovations. The ChargeDr uses an unspecified method of boosting the power from your computer’s USB port, so that a normal 5V, 0.5A-2.1A port always outputs 5V, up to 2.1A of power. The ChargeDr is about the size of a normal USB flash drive, so it’s convenient to carry when you travel and are more likely to need a quick boost in power. You just plug it in the USB port, and then plug your device’s cable into the ChargeDr. Data at the Digital Innovations website shows that a 3rd-gen iPad can charge in about 340 minutes compared to more than 1300 minutes without the ChargeDr, or a Kindle Fire HD will charge in about 240 minutes compared to more than 1200 minutes. It can even be used with AC wall adapters for a little extra boost. The ChargeDr works with Apple products using either the 30-pin or Lightning connectors and with most devices using a standard microUSB cable. (It doesn’t work with the Google Nexus 7 (non-standard microUSB) or devices that use a proprietary connector, such as some Samsung, Acer, and Asus tablets.) The ChargeDr is $29.99 at Digital Innovations.