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The new Yoga 710 series is the replacement for the older Yoga 700, which debuted at the end of 2015. The “Yoga” in the name isn’t merely for show, as these notebooks are capable of folding their displays 360 degrees around to transform into a tablet, or two in-between modes. The model we’re reviewing features a 14-inch display, but the 710 series is also available in 11- and 15.6-inch models. The key selling points of the Lenovo Yoga 710 14 are its premium magnesium-aluminum chassis, stylish design, good quality display, and excellent battery life. It’s too thick and heavy to be considered as a dedicated tablet replacement, but that complaint isn’t unique to this convertible PC. As a matter of fact, we’ve said that about almost every convertible PC we’ve reviewed. The convertible modes should be viewed as a bonus. About the battery life.We use our new Powermark benchmark for battery life testing. This test is more demanding than a typical run-down. It runs automated web browsing, ...

Charging Lithium-ion Find out how to prolong battery life by using correct charge methods. Charging and discharging batteries is a chemical reaction, but Li-ion is claimed to be the exception. Battery scientists talk about energies flowing in and out of the battery as part of ion movement between anode and cathode. This claim carries merits but if the scientists were totally right, then the battery would live forever. They blame capacity fade on ions getting trapped, but as with all battery systems, internal corrosion and other degenerative effects still play a role. The Li ion charger is a voltage-limiting device that has similarities to the lead acid system. The differences with Li-ion lie in a higher voltage per cell, tighter voltage tolerances and the absence of trickle or float charge at full charge. While lead acid offers some flexibility in terms of voltage cut off, manufacturers of Li-ion cells are very strict on the correct setting because Li-ion cannot accept overcharge...