Gomadic High Output Home Wall AC Charger designed for the Lenovo IdeaTab A2017 / A2109 with Power Sleep technology - Intelligently designed with Gomadic TipExchange Advanced state-of-the-art internal circuitry protects the Lenovo IdeaTab A2017 / A2109 from power surges, overcharging, and short-circuiting, to significantly extend the internal battery lifecycle. Power Sleep"" feature reduces vampire power draw 99%. Charger will consume less than 0.1W of power when in ""dormant state"" (e.g. not connected to the Lenovo IdeaTab A2017 / A2109). Gomadic Powerful High Wattage wall charger for home or travel use. Customized circuit design is based on the latest in power regulation and is tailored to the precise output voltage and resistor ID requirements of the Lenovo IdeaTab A2017 / A2109 (accurate to 0.1v!) Uniquely engineered in a small, lightweight, and highly portable design, the Gomadic Lenovo IdeaTab A2017 / A2109 Wall Charger travels easily, saving both space and time. TipExchange Technology protects your investment, by providing a means to change/upgrade your charger by simply swapping the physical charging tip. (Charging tip for Lenovo IdeaTab A2017 / A2109) included with additional tips sold separately)