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The Samsung Gravity (SGH-T459) is a slider feature phone with a full QWERTY keypad. It was first released for T-Mobile USA . The Samsung SGH-T349 is a mobile phone available through T-Mobile and announced on May 20, 2009 that has many similarities to the original Gravity.
A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage , amperes, current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.
Pendulum clock driven by three weights as "gravity battery". An old and simple application is the pendulum clock driven by a weight, which at 1 kg and 1 m travel can store nearly 10 Newton-meter [Nm], Joule [J] or Watt-second [Ws], thus 1/3600 of a Watt-hour [Wh], while a typical Lithium-ion battery 18650 cell [2] can hold about 7 Wh, thus 2500 times more at 1/20 of the weight.
The Samsung Gravity series of mobile phones includes: Samsung Gravity, released November 7, 2008; Samsung Gravity 2, released in August 2009; Samsung Gravity 3, released in June 2010; Samsung SGH-T669 (known as the "Gravity T" or "Gravity Touch"), a feature phone also released in June 2010; Samsung Gravity Smart, an Android smartphone released ...
A power bank is a portable device consisting of a battery, a charger to interface battery with charging power source and an output interface to provide desired output voltage. [10] Power banks are made in various sizes and typically based on lithium-ion batteries. A power bank contains battery cells and a voltage converter circuitry.
The phone includes an 1800mAh battery, providing theoretical talk time up to 10 hours, and standby time up to 13 days. [1] It uses a Qualcomm PM8921 power management chip [5] to handle battery charging. The phone supports Qualcomm's "Quick Charge 1.0" technology, [7] and can draw up to 2 amps from some [8] (but not all) 2-amp chargers.
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