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Question

High-wattage charging and long-term battery health?


Hey everyone, I’m looking for some advice from the tech-savvy folks here. I recently upgraded my device, and I’m currently in the middle of reorganizing my home office and mobile workstation setup. I’ve started using a dedicated 150-watt power module to run several peripherals and a high-speed charging hub. My goal was to have one "master" supply to handle everything—my laptop, my tablet, and my phone—to finally get rid of the mountain of cable clutter on my desk.

I was reading a discussion earlier about how modern devices negotiate power, and it got me thinking. My 150W module supports Power Delivery, but I’ve noticed my phone gets noticeably warmer when it's plugged into the high-output port compared to when I use an old, slow 20W brick. I’m a bit concerned about the thermal impact over time. Heat is famously the biggest enemy of lithium batteries, and since I’m hoping to keep this phone for several years, I’m starting to second-guess my "one-size-fits-all" power solution.

I’ve heard the argument that the phone’s internal controller only "pulls" the wattage it needs, but when you have a high-capacity power module potentially splitting loads between a power-hungry laptop and a phone, I worry about voltage stability. Has anyone else here experimented with using higher-wattage laptop-grade supplies or modular blocks for their daily mobile devices? I’d hate to find out the hard way that I’m taxing the battery controller more than necessary just for the sake of a clean desk.

Do you think the convenience of fast charging from a 150W source is worth the potential trade-off in battery longevity, or should I stick to a slower charger for my overnight top-ups?

2 commentaires

Dinh
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  • Champion
  • May 26, 2026

Hi,

I assumed you bought the charging block from a reputable brand.

Which phone are you using? Regarding charging speed, the phone itself determines how much power it draws. Typically, it will use higher wattage when the battery level is low, and once the battery gets higher, it reduces the charging speed. A warm temperature during charging is normal. As long as the phone’s thermal protection isn’t triggered, it should be fine.


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  • Champion
  • May 26, 2026

I have a Note 20 Ultra from 2020. In 2022 I started using 65 Watt laptop chargers to charge my phone regularly. Even my car charger is 100W.  The benefit is that it charges fast.

My phone starts cooling down when charging is complete.

Now the battery life is definitely worse. But I do not know if this is due to the higher wattage charging or due to the age of my phone and battery.

My recommendation is that if you are worried about the battery life, is to turn off the fast charging setting on your phone.

 

 

J'ai un Note 20 Ultra de 2020. En 2022, j'ai commencé à utiliser régulièrement des chargeurs d'ordinateur portable de 65 W pour recharger mon téléphone. Même mon chargeur de voiture est de 100 W. L'avantage, c'est que la charge est rapide.

Mon téléphone commence à refroidir une fois la charge terminée.

Maintenant, l'autonomie de la batterie est nettement plus faible. Mais je ne sais pas si cela est dû à la puissance de charge plus élevée ou à l'âge de mon téléphone et de sa batterie.

Si vous vous souciez de l'autonomie de votre batterie, je vous recommande de désactiver la charge rapide sur votre téléphone.