Amoi have updated one of their most popular phones with a battery increase from 2800mAh to 4200mAh in the Amoi A86W.
Known as the Amoi Big V here in China the A86W packs the same 1.2Ghz Quad-core processor, 1GB RAM and 8 mega-pixel rear camera as the original but with a much larger 4200mAh battery.
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With the lower power requirements of the CPU and the 720p display the battery in the Big V should easily see users last a couple of days on a single charge! Dimensions of the phone are good also with the body measuring in at just 9.9mm thick.[ Source ]