Gomadic Intelligent Compact Car / Auto DC Charger suitable for the Garmin nuvi 2457 / 2497 LMT - 2A / 10W power at half the size. Uses Gomadic TipExchange Technology Intelligent circuit provides precise output voltage and resistor configuration specific to the Garmin nuvi 2457 / 2497 LMT. This ensures battery is safely and efficiently charged without affecting battery longevity. Charger provides a full 10W (2,000mAh) of available current in a small form factor a little over 1 inch long. Flexible, straight cable measure 50 inches in total length. Gomadic TipExchange Technology protects your investment by providing a means to change/upgrade your charger by simply swapping the physical charging tip. (Charging tip for Garmin nuvi 2457 / 2497 LMT) included with additional tips sold separately) Built using high quality capacitors and circuit components to ensure that charging current does not interfere with FM radio transmissions. Rigorous Q&A process. Power Sleep"" feature will cut power draw of charger by over 99% when not in use. Charger will draw less than 0.1W of power when in ""ready state"" (e.g. not connected to the Garmin nuvi 2457 / 2497 LMT).