Lenovo has launched a new smartphone in China. Main distinctive sign, it contains a battery of 4000 mAh giving it greater autonomy to 40 days standby.  If autonomy is lacking in the majority of smartphones, some do still better than others. And the miracle cure is not software, such as trying to believe some manufacturers with their Stamina or Ultra power saving modes to name a few. And no. If you want to escape the scourge, no choice but to opt for a smartphone with a high capacity battery . They are few in the market but now have an additional reference: Lenovo P70 . More than 40 days