Unique Gomadic Car and Wall AC/DC Charger designed for the Amazon Kindle Paperwhite &ndash; Two Critical Functions, One Great Charger (includes Gomadic TipExchange) State of the art, advanced circuitry prevents the Amazon Kindle Paperwhite from being damaged by power surges, overcharging and/or short-circuiting. Broad input voltage range of 12-24VDC and 100-240VAC respectively. Permits charging via vehicle and home outlets worldwide! Intelligent circuit tailors precise output voltage (including resistor configuration) specific to the Amazon Kindle Paperwhite. This ensures battery is safely and efficiently charged. Backed by Gomadic Lifetime Warranty. This is a quality product that is built to last forever! When used in vehicle charging mode, high quality capacitors and circuit components ensure that charging current will not interfere with FM radio reception.