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The run-time for a battery-operated UPS depends on the type and size of batteries and rate of discharge, and the efficiency of the inverter. The total capacity of a lead–acid battery is a function of the rate at which it is discharged, which is described as Peukert's law. Manufacturers supply run-time rating in minutes for packaged UPS systems.
www.lenovo.com /products /us /laptop /ideapad /yoga /yoga-13 / The Lenovo IdeaPad Yoga 13 is a convertible laptop created by Lenovo and first announced at the International CES 2012 in January. The Yoga 13 gets its name from its ability to take on various form factors due to its screen being mounted on a special two-way hinge.
A backup battery provides power to a system when the primary source of power is unavailable. Backup batteries range from small single cells to retain clock time and date in computers, up to large battery room facilities that power uninterruptible power supply systems for large data centers.
It leveraged the new technology from the X300, including the options of a solid-state drive (SSD), an optional integrated camera, 12.1 in (31 cm) widescreen display, optional 3G mobile broadband card, a new 9-cell battery for extended running time up to 9.8 hours, weight as low as 1.34 kg (2.95 lb), and an Intel Core 2 Duo CPU up to 2.66 GHz.
The Laptop Magazine review of the ThinkPad L420 indicated the pros as being the "great keyboard, affordable price, good battery life, and quick boot time". [13] The battery life marked an improvement over the ThinkPad L412, which was criticized for its low battery life. Laptop Magazine indicated that the cons were weak audio, multitouch ...
[6] Engadget also tested the battery life of the Edge 13 and discovered that "Lenovo's battery life prediction of seven hours is pretty on the mark." The Edge 13's battery lasted 5 hours and 12 minutes. [6] Laptop Magazine reviewed the ThinkPad Edge 14 and found it was "the most compelling 14-inch small business notebook on the market today." [7]
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One point not in the laptop's favor was the low battery life—approximately 2 hours and 30 minutes. The laptop featured up to a 2.53 GHz Intel Core 2 Extreme QX9300 CPU, up to 8 GB of DDR3 RAM (two slots), either an ( MXM -mounted) Nvidia Quadro FX 2700M or FX 3700M with up to 1 GB video RAM, and a 17-inch (43 cm) 16:10 TN LCD display with a ...