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Like any rechargeable battery, the iPad's battery loses capacity over time. However, the iPad's battery is not user-replaceable. In a program similar to iPod and iPhone battery-replacement programs, Apple promised to replace an iPad that does not hold an electrical charge with a refurbished unit for a fee of US$99 plus $6.95 shipping.
Like the Kindle 3, the Kindle Touch has a capacity of 4 GB and battery life of two months under ideal reading conditions, and is larger than the Kindle 4. [34] The Kindle Touch was released on November 15, 2011. [35] Amazon announced in March 2012 that the device would be available in the UK, Germany, France, Spain and Italy on April 27, 2012. [36]
The Lightning connector was introduced on September 12, 2012, with the iPhone 5, as a replacement for the 30-pin dock connector. [3] The iPod Touch (5th generation), iPod Nano (7th generation), [4] iPad (4th generation) and iPad Mini (1st generation) followed in October and November 2012 as the first devices with Lightning.
Amazon Kindle is a series of e-readers designed and marketed by Amazon.Amazon Kindle devices enable users to browse, buy, download, and read e-books, newspapers, magazines, Audible audiobooks, and other digital media via wireless networking to the Kindle Store. [3]
A shunt charge controller or shunt regulator diverts excess electricity to an auxiliary or "shunt" load, such as an electric water heater, when batteries are full. [7] Simple charge controllers stop charging a battery when they exceed a set high voltage level, and re-enable charging when battery voltage drops back below that level.
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Inductive battery chargers use electromagnetic induction to charge batteries. A charging station sends electromagnetic energy through inductive coupling to an electrical device, which stores the energy in the batteries. This is achieved without the need for metal contacts between the charger and the battery.
H: 91.3 L: 65.1 W: 52.4 This battery contained two independent 4.5 V batteries, and had a four-pin connector. 9 V with a center tap was available by wiring in series. There were two ⌀3.2 mm negative pins spaced 9.5 mm apart and two ⌀4.0 mm positive pins spaced 14.3 mm apart. Negative and positive pins were spaced 18.1 mm apart.