The OnePlus 15 charges much faster than the iPhone 17 Pro Max, and this difference is significant.

But does fast charging really save you time and does it really kill your battery.

Consumers often complain about lengthy phone charging times, noting that some companies don't seem to increase charging power on even their top-tier models. At the same time, concerns exist that rapid charging could harm a phone's battery, with some believing that anything exceeding 30W is risky.

What are the actual effects of fast charging? How much time is gained, and does it negatively impact battery lifespan? As a supporter of fast charging, I decided to examine these questions.

I've been using phones with 80W fast charging for a couple of years, so I can offer my observations alongside research and lab data. First, let's cover some background information.

Batteries have two main components: an anode and a cathode, separated by an electrolyte. Charging involves lithium ions moving between these components, creating a voltage.

When a charger is connected, the current forces lithium ions to move from the anode. During use, these ions travel back to the cathode through the device.

This process generates heat because the energy conversion isn't fully efficient. Charging power refers to the rate at which ions move through the battery.

A faster rate means more heat. Now, let's look at how this affects battery health, along with my personal experiences using rapid charging.

How much time can it save?

The ability to fully charge a phone in roughly 40 minutes, versus over an hour, seems significant. I've been using an Honor Magic 6 Pro for two years, which supports 80W fast charging and goes from empty to full in 43 minutes.

Since I usually recharge before the battery drops below 15%, I likely spend around 30 minutes daily connected to a charger.

In contrast, my girlfriend's Galaxy S23 requires 68 minutes to charge fully, and as she also avoids fully draining the battery, it's probably connected for around an hour each day.

This means I've saved about 365 hours over two years, or 15 days. That's more than a week per year.

However, people typically charge their phones overnight while sleeping.

Needing to quickly charge a phone is relatively rare. For example, you might have to rush to a meeting with only 20% battery. Or, you might be traveling with limited charging options. Perhaps you forgot to charge overnight.

These situations occur, but not often. Charging is usually a consistent habit.

That is why fast charging is not always considered essential in polls. Most users prioritize a larger battery. Speaking of batteries.

Lithium batteries degrade from heat, voltage, and time. Fast charging can add stress early in the charging process and near full charge. However, most fast-charging phones have systems that protect the battery.

Even with daily aggressive charging, a modern smartphone battery should last around 1,000 cycles before dropping to 80% capacity. That's over three years, and the battery will still function.

Also, overnight charging utilizes protective algorithms that limit stress on the battery.

Therefore, you likely don't need to worry too much about battery degradation from fast charging.

In conclusion, fast charging might not save as much time as you expect, due to charging habits. At the same time, you likely don't have to be concerned about battery issues with rapid charging.

Ultimately, the decision is yours. If you value the option to quickly top up your battery in urgent situations, then choose a phone with fast charging.

However, if you have a consistent routine, it's not a problem if your phone has slower charging capabilities.

What are your thoughts? Have you used super-fast charging and did it make a difference? Share your experiences in the comments.

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