HP Laptop 15-dy2088ca kept charging at 100%.

[jejeboi]

Hi I have a HP Laptop 15-dy2088ca, and was wondering if it is safe to leave it plugged in even when its at 100%. If I do this will my laptop run off the battery or directly of the power supply?

[NonSequitur777 · Accepted solution]

@jejeboi,

Welcome to our HP User Forum!

To answer your first question: yes, it is generally safe to leave a laptop plugged in even when it's fully charged (at 100%). Modern laptops are designed with built-in charging management systems that help prevent overcharging the battery and minimize the potential negative effects on battery life.

Lithium-ion batteries, which are commonly used in laptops and other portable devices, have mechanisms in place to prevent overcharging. When the battery reaches 100%, the charging circuitry typically stops providing power to the battery and switches to a power source that directly powers the laptop's operation. This helps prevent continuous charging and reduces stress on the battery.

However, it's important to note a few points to ensure the longevity of your laptop's battery:

1. Heat: High temperatures can have a negative impact on battery life. If you're leaving your laptop plugged in for an extended period, make sure it's in a well-ventilated area and not placed on soft surfaces that could block airflow and lead to overheating.

2. Long-Term Storage: If you're planning to store your laptop for an extended period, it's actually better to store it with the battery partially charged (around 50%) rather than fully charged. This helps prevent the battery from being at a very low or very high charge level, which can stress the battery over time.

3. Occasional Discharge: While you don't need to regularly fully discharge and recharge your laptop's battery, it's a good practice to occasionally let the battery level drop below 100% and then recharge it. This can help the battery management system recalibrate and maintain accurate capacity readings.

4. Battery Health Mode: Some laptops offer a "Battery Health" or "Battery Saver" mode that limits the maximum charge to something below 100%. Enabling this mode when you know you'll be leaving your laptop plugged in for an extended period can help reduce the overall stress on the battery.

In summary, leaving your laptop plugged in at 100% is generally safe due to built-in charging safeguards, but it's a good idea to consider the points mentioned above to ensure the long-term health of your laptop's battery.

To answer your second question: when your laptop is fully charged and plugged in, it will typically run directly off the power supply (AC adapter) rather than using the battery. The laptop's charging circuitry is designed to prioritize using the direct power supply when the battery is fully charged. This is done to prevent unnecessary charging cycles and minimize wear on the battery.

In this state, the laptop draws power directly from the electrical outlet through the AC adapter, while the battery essentially remains in a dormant state. The charging system manages the flow of power to the laptop's components and keeps the battery's charge level steady without overcharging it.

By operating this way, the laptop can provide you with consistent performance and keep the battery health in good condition, as it's not constantly cycling between charging and discharging when it's fully charged and plugged in.

Hope this was helpful.

Kind Regards,

NonSequitur777