Looking to juice up your Samsung Galaxy S3 for at least four days without recharging? The new ZeroLemon Extended Battery is up to the task and is available for only $US33 with colour options to boot.

The power accessory is retailed by Amazon in black, blue and white with promises that users will not need a run to the nearest power outlet for the next four days at the maximum.

The behemoth kit, according to Gotta Be Mobile, is considered as the largest battery extension for the GS3 to date. It delivers a whopping amount of energy juice thanks to its rating of 7000mAh.

But the powerhouse that it is, the ZeroLemon will transform the GS3 into a hulking smartphone so users who give premium on style over functions will find it hard to accept this heavy compromise.

If the emphasis, however, is convenience then the ZeroLemon packs all the goods. GS3 owners should be delighted by the prospect of uninterrupted gaming and social networking for a few days with the fully-charged battery.

The whole package comes with a TPC plastic case, which eliminates the worries of hiding the protruding beast of a battery.

The same case, GBM said, "fits over the back of the phone and wraps around to the front for a more ergonomic feel."

Compared to the official GS3 extended battery that Samsung had issued December last year, carrying a 3000mAh rating, the ZeroLemon offers more bang for the bucks.

That Samsung kit levelled up with the same power source of the Galaxy Note 2 but extensive usage only allows less than 24 hours of operation.

In essence, ZeroLemon has extended the power possibilities that Samsung delivered, both with the original battery that came with the Galaxy S3 and the extra power-plant that was retailed a few months after the GS3's 2012 release date.