Longevity gets packed into the Chinese firm's first WinPho-powered device.
An image of what was thought to be the Huawei W1 was leaked back in October, and it seems the snap was legit.
The Chinese OEM has debuted its first Windows Phone-powered smartphone at CES, and claims that the 1950 mAh battery provides 470 hours of standby time (around 19.5 days), which it adds is the longest standby offered by any device in its class.
That aside, the W1 is 10.15mm thin and features a four-inch IPS LCD touchscreen and Qualcomm Snapdragon dual-core processor.
Richard Yu, CEO, Huawei Consumer Business Group, said: "At a price that makes sense to consumers, W1 underscores our commitment to put smartphones within reach of every consumer, no matter who you are or what you want from your phone."
The W1 will launch in China and Russia this month, while Western Europe, the Middle East and the US will have to wait until further notice.
Meanwhile, the firm has also announced a mammoth-sized 6.1-inch phablet, the Ascend Mate.