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Laptop charging trolleys, also known as laptop trolleys or laptop carts, are mobile storage containers to charge laptops, netbooks and tablet computers en masse. The trolleys are predominantly used in schools that have replaced their traditional static ICT [ 1 ] suites of desktop computers with laptops, but do not have enough plug sockets in ...
Infinix Mobile is a smartphone company with headquarters in China, founded in 2013 by Transsion Holdings. [1] [2] [3] Their devices are manufactured in several countries.[citation needed]
Public EV charging stations often provide 6 kW (host power of 208 to 240 V AC off a 40-ampere circuit). 6 kW will recharge an EV roughly six times faster than 1 kW overnight charging. Rapid charging results in even faster recharge times and is limited only by available AC power, battery type, and the type of charging system. [21]
Revision 1.2 of the specification was released in 2010. It made several changes, and increased limits including allowing 1.5 A on charging downstream ports for unconfigured devices—allowing High Speed communication while having a current up to 1.5 A. Also, support was removed for charging port detection via resistive mechanisms. [54]
Qi (/ tʃ iː / CHEE) is an open standard for inductive charging developed by the Wireless Power Consortium.It allows compatible devices, such as smartphones, to receive power when placed on a Qi charger, which can be effective over distances up to 4 cm (1.6 in). [1]
In 2007, a team led by Marin Soljačić at MIT used a dual resonance transmitter with a 25 cm diameter secondary tuned to 10 MHz to transfer 60 W of power to a similar dual resonance receiver over a distance of 2 meters (6.6 ft) (eight times the transmitter coil diameter) at around 40% efficiency. [35] [84]
Slower charging – Due to the lower efficiency, devices take 15 percent longer to charge when supplied power is the same amount. [10] More expensive – Inductive charging also requires drive electronics and coils in both device and charger, increasing the complexity and cost of manufacturing. [11] [12]
The vast majority of laptops on the market are manufactured by a small handful of Taiwan-based original design manufacturers (ODM), although their production bases are located mostly in mainland China. Quanta Computer pioneered the contract manufacturing of laptops in 1988. By 1990, Taiwanese companies manufactured 11% of the world's laptops.