For the first time in a power handle, Welch Allyn introduces smarter Lithium Ion technology to provide twice the on-time with just half the weight. The Lithium Ion Power Handle’s new Lithium Ion technology powers any of our 3.5v instrument heads for 110 minutes – twice as long as the conventional handle. With an updated, ergonomic design and weighing only 4.4 ounces, the handle is more comfortable for any size hand. An indicator light warns you when the battery is running low, and your choice of charging modules makes recharging simple and convenient. Made of durable CYCOLOY® construction, the Lithium Ion Power Handle will provide years of reliable quality.