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2. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   A Battery: Eveready 742: 1.5 V: Metal tabs H: 101.6 L: 63.5 W: 63.5 Used to provide power to the filament of a vacuum tube. B Battery: Eveready 762-S: 45 V: Threa­ded posts H: 146 L: 104.8 W: 63.5 Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies.

3. Button cell - Wikipedia

   en.wikipedia.org/wiki/Button_cell

   Button, coin, or watch cells. A button cell, watch battery, or coin battery is a small battery made of a single electrochemical cell and shaped as a squat cylinder typically 5 to 25 mm (0.197 to 0.984 in) in diameter and 1 to 6 mm (0.039 to 0.236 in) high – resembling a button.

4. Battery holder - Wikipedia

   en.wikipedia.org/wiki/Battery_holder

   Battery types such as the 9-volt have snap-on contacts. Battery holders for zinc-air batteries must not be completely air-tight since approximately 1 litre of air is required per ampere-hour of discharge per cell. The battery holder may include a valve integrated with the device power switch to allow air to be admitted when the device is ...

5. Qualcomm Hexagon - Wikipedia

   en.wikipedia.org/wiki/Qualcomm_Hexagon

   According to 2012 estimation, Qualcomm shipped 1.2 billion DSP cores inside its system on a chip (SoCs) (average 2.3 DSP core per SoC) in 2011, and 1.5 billion cores were planned for 2012, making the QDSP6 the most shipped architecture of DSP [12] (CEVA had around 1 billion of DSP cores shipped in 2011 with 90% of IP-licensable DSP market [13]).

6. Class-D amplifier - Wikipedia

   en.wikipedia.org/wiki/Class-D_amplifier

   Block diagram of a basic class-D amplifier. Note: For clarity, signal periods are not shown to scale. A class-D amplifier, or switching amplifier, is an electronic amplifier in which the amplifying devices (transistors, usually MOSFETs) operate as electronic switches, and not as linear gain devices as in other amplifiers.

7. Chopper (electronics) - Wikipedia

   en.wikipedia.org/wiki/Chopper_(electronics)

   Chopper circuits are used in multiple applications, including: Switched mode power supplies, including DC to DC converters.; Speed controllers for DC motors; Driving brushless DC torque motors or stepper motors in actuators

8. Creative Zen - Wikipedia

   en.wikipedia.org/wiki/Creative_Zen

   The package includes the player, a leather case with belt-clip, a lithium-ion battery, a USB cable, and a pair of standard earbuds. The Zen Xtra does not support the FM tuner from the original Zen and does not have recording capability. The Xtra was the first DAP to support RealNetworks's Helix DRM, through tailored firmware.

9. Helix (disambiguation) - Wikipedia

   en.wikipedia.org/wiki/Helix_(disambiguation)

   Helix (cipher) published in 2003 Helix (database), database management system for the Apple Macintosh platform, created in 1983 Helix (multimedia project), a project to produce computer software that can play audio and video media in various formats, aid in producing such media, and serve them over a network