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  2. List of iPad models - Wikipedia

    en.wikipedia.org/wiki/List_of_iPad_models

    iPad Air (3rd) March 18, 2019 iOS 12.2: March 18, 2019 September 15, 2020 Latest iPadOS iPadOS 18.3.1: Supported February 10, 2025: 5 years, 10 months iPad Air (4th) September 15, 2020 iPadOS 14.1: October 23, 2020 March 8, 2022 4 years, 4 months iPad Air (5th) March 8, 2022 iPadOS 15.4: March 18, 2022 May 7, 2024 2 years, 11 months iPad Air (6th)

  3. Nanowire battery - Wikipedia

    en.wikipedia.org/wiki/Nanowire_battery

    The performance of this nanowire as anode for lead-acid battery has also been evaluated. Due to largely increased surface area, this cell was able to deliver an almost constant capacity of about 190 mAh g −1 even after 1,000 cycles. [14] [15] This result showed this nanostructured PbO 2 as a fairly promising substitute for the normal lead ...

  4. iPad Air (1st generation) - Wikipedia

    en.wikipedia.org/wiki/IPad_Air_(1st_generation)

    The iPad Air marked the first major design change for the iPad since the iPad 2; it has a thinner design that is 7.5 millimeters thick and has a smaller screen bezel similar to the iPad Mini. Apple reduced the overall volume for the iPad Air by using thinner components resulting in a 22% reduction in weight over the iPad 2. [14]

  5. iPad (7th generation) - Wikipedia

    en.wikipedia.org/wiki/IPad_(7th_generation)

    The 2019 10.2-inch iPad was criticized for the a lack of a processor upgrade over the previous year's 9.7-inch model. [14] However, while the A10 processor itself has not been upgraded to a later processor, the system-on-chip housing the A10 chip in the 2019 10.2-inch iPad has been upgraded to include 3 GB of RAM, 50% more than the previous ...

  6. Aluminium–air battery - Wikipedia

    en.wikipedia.org/wiki/Aluminium–air_battery

    The design battery energy density is 1300 Wh/kg (present) or 2000 Wh/kg (projected). The cost of battery system chosen to evaluate is US$ 30/kW (present) or US$ 29/kW (projected). Al/air EVs life-cycle analysis was conducted and compared to lead/acid and nickel metal hydride (NiMH) EVs.

  7. iPad - Wikipedia

    en.wikipedia.org/wiki/IPad

    iPad Front face of the last generation's flagship model, the iPad Pro (5th generation) Developer Apple Manufacturer Foxconn (on contract) Pegatron Type Tablet computer Release date April 3, 2010 ; 14 years ago (April 3, 2010) (1st generation) Units sold 677.7 million (as of 2022) Operating system iOS (2010–2019) iPadOS (2019–present) Connectivity WiFi, cellular, 30-pin dock connector ...

  8. Lithium metal battery - Wikipedia

    en.wikipedia.org/wiki/Lithium_metal_battery

    Lithium batteries are widely used in portable consumer electronic devices. The term "lithium battery" refers to a family of different lithium-metal chemistries, comprising many types of cathodes and electrolytes but all with metallic lithium as the anode. The battery requires from 0.15 to 0.3 kg (5 to 10 oz) of lithium per kWh.

  9. Silver oxide battery - Wikipedia

    en.wikipedia.org/wiki/Silver_oxide_battery

    They are available in small sizes as button cells, where the amount of silver used is minimal and not a prohibitively expensive contributor to the overall product cost. Silver oxide primary batteries account for 30% of all primary battery sales in Japan (64 mil. out of 212 million in February 2020).

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