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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. Power over Ethernet - Wikipedia

   en.wikipedia.org/wiki/Power_over_Ethernet

   The original PoE standard, IEEE 802.3af-2003, [1] now known as Type 1, provides up to 15.4 W of DC power (minimum 44 V DC and 350 mA) [2] [3] on each port. [4] Only 12.95 W is guaranteed to be available at the powered device as some power dissipates in the cable.

4. 48-volt electrical system - Wikipedia

   en.wikipedia.org/wiki/48-volt_electrical_system

   A 48 V system can provide more power, improve energy recuperation, [7] and allow up to an 85% decrease in cable mass. [10]12-volt systems can provide only 3.5 kilowatts, while a 48 V power could achieve 15 to 20 kW or even 50 kW. 48 volts is below the level that is considered safe in dry conditions without special protective measures. [11]

5. Coaxial power connector - Wikipedia

   en.wikipedia.org/wiki/Coaxial_power_connector

   Used in Acer Aspire V5 adapter and some Hikvision 48V NVRs 5.50 2.10 M CUI Inc. P5 CUI Inc. PP3–002A Kobiconn 3217-EX Philmore 210, 210L, 2109 Switchcraft 762, 763 [6] CUI Inc. PR-002A (inline) Kobiconn 0302 (inline) Philmore 257 (inline) Switchcraft 721A (panel) [7] 2.1 mm center pin Common on guitar effect pedals Arduino power adapter

6. Lithium iron phosphate battery - Wikipedia

   en.wikipedia.org/wiki/Lithium_iron_phosphate_battery

   The specific energy of LFP batteries is lower than that of other common lithium-ion battery types such as nickel manganese cobalt (NMC) and nickel cobalt aluminum (NCA). As of 2024, the specific energy of CATL's LFP battery is claimed to be 205 watt-hours per kilogram (Wh/kg) on the cell level. [13] BYD's LFP battery specific energy is 150 Wh ...

7. Phantom power - Wikipedia

   en.wikipedia.org/wiki/Phantom_Power

   AKG C1000S, uses phantom power or a battery. Some microphones offer a choice of internal battery powering or (external) phantom powering. In some such microphones, it is advisable to remove the internal batteries when phantom power is being used since batteries may corrode and leak chemicals.

8. Lithium-ion battery - Wikipedia

   en.wikipedia.org/wiki/Lithium-ion_battery

   A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life.

9. Boost converter - Wikipedia

   en.wikipedia.org/wiki/Boost_converter

   A boost converter or step-up converter is a DC-to-DC converter that increases voltage, while decreasing current, from its input to its output . It is a class of switched-mode power supply (SMPS) containing at least two semiconductors, a diode and a transistor , and at least one energy storage element: a capacitor , inductor , or the two in ...