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An AC adapter or AC/DC adapter (also called a wall charger, power adapter, power brick, or wall wart) [1] is a type of external power supply, often enclosed in a case similar to an AC plug. [2] AC adapters deliver electric power to devices that lack internal components to draw voltage and power from mains power themselves.
Different battery powered power tools often use batteries which are not compatible across brands and models. This may cause vendor lock-in, and results in poor sustainability if and when either the battery, charger, or power tool component fails, resulting in potentially all having to be replaced.
LCDs do not produce light by themselves, so they need illumination (ambient light or a special light source) to produce a visible image. Backlights are often used in smartphones, computer monitors, and LCD televisions. They are used in small displays to increase readability in low light conditions such as in wristwatches. [1]
In moments when 911 is dialed, the first 8 to 10 minutes can be crucial to someone in distress. Debuting at the 2025 CES, Glomensio’s Firefly Gen 2 is a compact and smart “Light-Up House ...
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An intelligent charger may monitor the battery's voltage, temperature or charge time to determine the optimum charge current or terminate charging. For Ni–Cd and Ni–MH batteries , the voltage of the battery increases slowly during the charging process, until the battery is fully charged.