Helio P35

While the power efficiency of phones has significantly improved over the years, overall phone battery life has none the less been squeezed by design choices such as large screens and the desire for thin phone bodies. This has resulted in manufacturers continuing to experiment with phones with larger batteries; and while some vendors take this to the extreme with 18,000 mAh monsters, others have been working on more modest-sized phones. Ulefone for their part was one of the companies that started to use high-capacity batteries with its handsets several years ago, so it was not particularly surprising to see its new mid-range smartphone, the 6,350-mAh capacity Power 6, at this year's Mobile World Congress.