Get power when and where you need it with a spare thinkpad ac adapter (slim tip). Keep a spare charger in the office, one at home, and another in your carrying case for convenient access to power wherever a wall outlet is available. Great as a spare or replacement for your laptop. Perfect companion for office, travel and home usage that helps customers save on power consumption costs, space and equipment. Features system building block accessory identical to the adapter bundled in 45w thinkpad systems 26% smaller than the current thinkpad 65w ac adapter energy efficient with energy star v (es 2. 0) compatible with thinkpad helix, t4301s, and 2013 lenovo notebooks with slim common power plug not compatible with legacy notebook systems with the round, barrel-type power plug