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July 2013) (Learn how and when to remove this message) The liquid contact indicator is the white circular object in the middle of this photograph of MacBook Air logic board . A liquid contact indicator ( LCI ) is a small indicator that turns from white into another color, typically red, after contact with water.
Charging controller of a USB power bank. A charge controller, charge regulator or battery regulator limits the rate at which electric current is added to or drawn from electric batteries to protect against electrical overload, overcharging, and may protect against overvoltage.
Battery balancer Contacts on a DeWalt 20V Max (18V XR in Europe) power tool battery. The C1–C4 contacts are connected to the individual cells in the battery and are used by the charger for battery balancing.
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Try Other Items from Your Pantry. Soak a paper towel in cooking oil or white vinegar and then place it over the sticker for about 5 to 10 minutes to soften the glue.
The safety of power station employees is a major concern during an unscheduled power outage at a power plant. A bank of large station backup batteries are used to power uninterruptible power supplies as well as directly power emergency oil pumps for up to 8 hours while normal power is being restored to the power station.
A known failure mode of Lightning plugs is power contacts turning black over time, sometimes causing the affected side of the connector to cease functioning. When the plug is inserted or unplugged while powered, a brief spark may occur between the mating power contacts in the plug and socket, eroding their gold plating. Because the Lightning ...
To prevent adverse effects, a battery management system or battery charger may keep the battery from extreme levels regarding SoC, thereby limiting the SoC to a reduced range between 0 % and 100 % and decreasing depth of discharge below 100 % (see example below). This corresponds to the DoD in the sense of definition (1).