Global PC leader Lenovo has unpacked three new thinner and lighter ThinkPad ultrabooks, featuring larger trackpads and swappable batteries, as the company continues to modernize its mobile PC lineup.

The ThinkPad T440s, T440 and X240 ultrabook laptops are 20 percent thinner with trackpads up to 45 percent larger, sporting improved click functionality supporting Microsoft’s (MSFT) Windows 8. Lenovo has equipped the new models with “all day” battery life owing to its new “hot swap” Power Bridge technology, which allows users to swap external batteries without powering down. Lenovo also has outfitted its new ultrabooks with a variety of sensors to detect shock, heat, voltage and current control to protect components. In addition, the new ThinkPads boast hardware-based biometric fingerprint security and tamper detection to secure data, along with a carbon fiber shell for physical protection of the unit.

Lenovo said the upgrades to its ThinkPad line resulted from “extensive research” with hundreds of consumers worldwide.

”Constant improvements and a strong ambition to always build a better laptop has resulted in thinner, lighter and longer lasting ThinkPad laptops with a simpler and cleaner design and up to an incredible 17 hours of battery life,” said Dilip Bhatia, Lenovo Think Business Group marketing vice president. “The result of thousands of hours spent with consumers and business users have contributed to innovations and enhancements optimized for business and personal use.”

The T440 and the T440s—the higher end of the two—share a number of features, each measuring 21mm thin and offering up to 1TB of local storage or high-speed solid state drives (SSD), WiFi and optional 4G WWAN technology. The T440s, however, comes with an Intel (INTC) Core i7 processor and has a built-in 1080p touchscreen—upgrades from the T440’s Core i5 processor and optional touchscreen and resolution. The T440 is priced at $899 and the T440s at $1,149. Both units are slated to be on store shelves in October.

Lenovo also is offering the X240, a 12.5-inch ThinkPad supporting up to an i7 processor and offering optional touch on a 1080p display. The unit weighs about 3 pounds and measures 20.3mm, and is priced at $1,099. It is slated for an October availability.

In addition, the vendor added to its ThinkPad S family with the 14-inch S440 and the 15-inch S540, both of which are touch-enabled and support up to i7 processors. The devices are aimed at the Asia and Europe markets. The S440 is priced at 699 euros while the S540 is listed at 649 euros, with the former scheduled to be available this month and the latter in October.

Lenovo said it has backed the new units with add-ons such as warranty extensions, upgrades, accidental damage protection, priority technical support and factory and automated deployment services.

The Chinese PC maker said it expects to more than double its in-house notebook production to nearly 60 percent of units manufactured in 2014, relying on a newly opened manufacturing facility in Whitsett, N.C., to produce some convertible ultrabooks in addition to its Think-branded desktops and tablets.

Chris Frey, Lenovo's North America commercial channels vice president, recently told The VAR Guy the vendor now drives about 85 percent of its business in North America, amounting to $1 billion in sales, through its channel partners.