LAS VEGAS - China's Huawei Technologies boosted smartphone with bigger, higher-resolution screen on Monday with two new devices aimed at challenging much bigger rivals, including Samsung Electronics and Apple.

The Chinese phone maker unveiled "the world's biggest smartphone" Ascend Mate and the Ascend D2, calling it "most powerful smartphone" on the eve of the Consumer Electronics Show in Las Vegas.

The Ascend D2, smaller phone but with a range of impressive specs, would have a high-definition screen with 443 pixels per inch compared with the most advanced Samsung and Apple phones, with resolutions more than 300 pixels per inch range, according to Huawei.

It is slightly smaller at a 5-inch screen, but the biggest spec on the sheet is this device's resolution. At 1080x1920 pixels with a pixel density of 443ppi, this device's screen specs are even more impressive than the Samsung Galaxy S3's and iPhone 5's.

The Ascend Mate device has a screen that measures a 6.1-inch display compared with Samsung's biggest smartphone to date, the Galaxy Note II has a 5.5-inch display. It has an 8-megapixel camera, a front-facing camera.

The standout feature, though, is the whopping 4050mAh battery, which Huawei claims can provide 48 hours of power. This battery capacity smashes records. Up until now, Motorola's Droid Razr Maxx has been the reigning champ with a 3,300mAh battery.

Huawei's consumer business CEO Richard Yu said the company is hoping its latest smartphones will offer an alternative for people who have to carry around their tablet computer, laptop, smartphone and camera all at once.

"Our idea is whether we can have one thing for all that," Yu said.

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