In general, having the charger plugged in and the battery too (if it is removeable), the battery will constantly be "charged" in the "constant voltage" mode to fight self-discharge. Many manufactures do not hard-cut the battery when the charger is connected, so the charging voltage is always applied.
This page has a good answer: "it depends" The answer is: YES and NO, it depends on the situation. Having a battery fully charged and the laptop plugged in is not harmful, because as soon as the charge level reaches 100% the battery stops receiving charging energy and this energy is bypassed directly to the power supply system of the laptop.
Keeping your system plugged in while the battery is at 100% charge won’t be a problem if you’re working at cool temperatures. However, if the temperatures are elevated and the battery is fully charged, it can potentially damage the battery. If you remove the battery, don’t store it in a discharged state.
Having your battery charged to 100% all the time is not good for the battery. Past 80% or so, the higher percent you charge to, there will be more and more stress on the battery. So for example, charging to 95% from 90% might give you 0.2 cycles of wear, while charging to 100% from 95% will give you 0.4 cycles of wear in total.
As soon as the battery hits 100% mark, the internal circuit disconnects the power source from sending any other current. The power circuit is designed to detect the upper limit and will cut off the power connection when it reaches the limit. So as soon as the battery is ultimately charged, it stops receiving charging energy.
In the case of rechargeable batteries, it entirely depends on the OEM. While it works on the same principles, check with the OEM if they offer a circuit breaker when the charge is complete. Most mobile phones and laptops come with this feature, but still, make sure to check with your OEM. Should you keep the laptop plugged in all the time?
r/batteries on Reddit: Leaving a portable device''s charger …
I guess I am asking if the device is drawing current from the battery or the charging circuit directly when it is fully charged. Or does it drain the battery slightly, lets say 2-3%, and the charging …
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I guess I am asking if the device is drawing current from the battery or the charging circuit directly when it is fully charged. Or does it drain the battery slightly, lets say 2-3%, and the charging circuit then replenishes the battery. Additionally, if it does not use the battery when full and the charger is connected; because ...
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if my laptop is fully charged, still keeping the charger plugged
However, you should NOT unplug the battery when fully charged. Every time you unplug the power and use it on battery, you degrade the battery; they are only good for a finite number of charges. In addition, if you use it on battery at your desk, and then need to go portable, you might not have much use time left.
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Can I use pc by plug in even when it is fully charged?
6 · Yes, you can use your computer plugged in even when batter is full. Most modern computers have the capacity to manage this scenario. Once a laptop battery is fully charged and the laptop is used while plugged in, the battery is usually bypassed for power consumption, meaning the laptop runs directly on power from the wall outlet. This means it ...
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Can I use pc by plug in even when it is fully charged?
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If battery is not fully charged, the laptop will use power from the outlet and charge the battery, when battery goes to 100, the laptop cuts power from it and uses only the outlet No laptop that i know of would use both the charger and the battery at the same time
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