The autonomy of our dear connected devices is often subject to criticism. Who has not had to charge their smartphones before the end of the day in order to continue to use it? However, the batteries of these devices rather take the shock in the period, and on many models. This is the conclusion of a study conducted by the UFC Que Choisir.
The test protocol is scientific. “After three break cycles of the battery, the video playback (YouTube via Wi-Fi) was measured to establish a baseline Then, the devices were subjected to repeated discharge / recharge cycles for several months. The batteries discharge up to 20% capacity and are charged up to 100%, it is a “cycle”. Between two cycles, it is expected that the temperature of the battery decreases and stabilizes before starting a new cycle. At the end of the test, we compared the autonomy to its initial value and noted the number of cycles. “
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The result: there is a real gap between the actual performance observed and experienced users. “The results of our tests are quite surprising, in that they show that the batteries rather hold well in shock. At the end of the test, that is to say, after a load corresponding to a two-year service life about the “worst” battery – that of the smartphone Huawei Ascend P7 – lost only 14% of autonomy G Flex LG Battery is she, even surprising finding intact side touch pads: -12%.. for LG G Pad 8.3, -5% for Apple iPad Air, “said the association.
The radius of smartphones, however, note the poor performance of the iPhone 5s (-13%) and the Microsoft Surface 2 in the tablets (-12%). But it has the highest self out.
As for the most efficient batteries, in addition to the LG G Flex, the 2nd class combination of Sony Xperia Z2 (-1%), the LG G2 and Moto G (-3%). In tablets, besides the iPad Air, are classified Samsung Galaxy Tab 10.1 4 (-7%) and Acer Iconia A3-A10 and the Asus Memo Pad FHD 10 (-8%). The rest of the results is seen here.
The association asks: “how to explain this paradox between consumer perception and actual battery performance Daily maintenance could be a track after all, maybe do users quickly deplete battery?. by manhandling it. In addition, batteries age inexorably (with time they oxidize naturally). “
“A statistical phenomenon can also contradict our results: the 15 batteries tested form only a tiny drop in the ocean of million of outstanding batteries, which inevitably has some samples failed Nothing, however, justifies that. stinginess manufacturers regarding warranty batteries. Today, they are content to ensure the six months while consumers would be entitled to expect a battery takes at least 2 years, the average length using a smartphone (or 3 years for tablets), “says the UFC.