iPhone 4S Rival Alert : Motorola adds Droid Razr Maxx to Portfolio

The Motorola Droid Razr Maxx smartphone is set to debut on US mobile network operator Verizon in 24 hours, and will offer a bigger battery and double the onboard storage capacity compared to the original Droid Razr - which is on sale in the UK for as little as £399.

The Maxx now offers a 3300mAh battery, by far the biggest found in any normal smartphone; only the Galaxy Note offers a beefier battery. The downside of this is the added thickness, as the Maxx is nearly a quarter thicker than the Razr (that's a mere 1.9mm though).

The bigger battery means you can now talk for up to 21 hours, watch movies for up to 15 hours or listen to music for up to 60 hours.

The rest of the feature list remains the same; there's the dual core TI OMAP chipset clocked at 1.2GHz, 1GB RAM (but 32GB onboard storage - 16GB built in and a bundled 16GB microSD card), a 4.3-inch 960x540 pixel display, a kevlar back, an eight megapixel rear camera with HD video, a front-facing 1.3-megapixel one, Android 2.3.5 Gingerbread (with Ice Cream Sandwich update coming), Wi-Fi, 4G connectivity, DLNA, Wi-Fi and a microSD card slot.

The phone - which can also be used with the lapdock accessory - will cost $299 on a two-year contract. The introduction of the Razr Maxx means that the original Razr has now been discounted to $199.