The Droid Razr Maxx from Motorola goes on sale Thursday for $299.99 with a two-year agreement, Verizon Wireless announced Tuesday .

Motorola showed off the Maxx earlier this month at the Consumer Electronicsd Show (CES), noting that its 3300 mAh battery is about double what most current smartphones offer and supports up to 21 hours of talk time on a single charge. That makes it the biggest battery for a smartphone, and supports the Maxx's video and song-playing capabilities.

The Droid Razr Maxx from Motorola.

The Maxx will run over Verizon's 4G LTE and features a dual-core 1.2 GHz processor; a 4.3-in. Super Amoled Advanced touchscreen with 540-by-960-pixel resolution; an 8-megapixel camera as well a a 1.3-megapixel camera; 1GB of RAM; 16GB of internal storage, plus 16GB more on a micro SD card.

It will sell for $100 more than the Droid Razr did when it first went on sale in October. Both devices run Android 2.3.5, upgradable to Android 4.0, "Ice Cream Sandwich."

The Maxx weighs 5.1 ounces and measures 5.14 in. by 2.7 in. and is 0.35 in. thick, barely larger than the Droid Razr.

Customers buying the Maxx need a nationwide talk plan that starts at $40 a month and a data package starting at $30 a month for 2GB of data.

Matt Hamblen covers mobile and wireless, smartphones and other handhelds, and wireless networking for Computerworld. Follow Matt on Twitter at @matthamblen or subscribe to Matt's RSS feed . His e-mail address is [email protected] .

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