Is Wireless Charging Bad For Battery?

With Apple’s adoption of wireless charging technology from the iPhone 8 and X and Samsung having adopted this with their Galaxy Smartphones sometime earlier, the convenience of wireless charging has become very popular – but, is wireless charging bad for battery?

Wireless charging is not bad for your battery, and it can prolong battery life by keeping the battery topped off during daily usage. It will also greatly lessen the wear and tear on the phone’s charging port, which is often one of the more common repairs with smartphones due to constant use.

To understand why wireless charging does not adversely affect your battery, we need to look at some battery and charging basics and how keeping your battery between certain charge levels can prolong its life and performance.

How Does A Phone Battery Work?

phone battery

Your smartphone uses a lithium-ion battery for its power source. The battery has a positive and negative electrode with an electrolyte between them.

While charging, the ions flow from the positive to the negative electrode, and during the discharge cycle, the flow is the opposite.

The battery will then charge up to 100% and then discharge throughout the day as you use it, then recharge overnight or charge it, so the cycle continues.

Whether you use a cable charger or wireless charger will make no difference here, but what does make a difference is the charge levels you keep your battery at and heat.

Extend Your Smartphone’s Battery Life Using This Trick

charging lifecycle

Any battery that cycles through charge and discharge has a limited number of cycles it can charge before losing capacity. After 500 complete charge cycles, the battery will lose about 20% of its power with iPhones.

To prevent this and significantly extend your battery’s life, keep the battery charged between 50% and 80% of its capacity during the day. Here is where the convenience of wireless charging is evident.

Many coffee shops and other businesses have wireless charging stations, and instead of having to rummage for cables and take them with you, you can maintain that charge level state no matter where you are.

Also, modern cars often come fitted with wireless charging pads so you can maintain battery charge levels while driving.

Occasionally, letting your battery drop lower than 50% of its capacity won’t impact, but doing this daily will dramatically reduce your battery’s lifespan!

Keeping the discharge at 50% or more consistently rather than draining it 100% can extend your battery life by 400%!

Don’t Exceed The Voltage Cycle Limits

Voltage cycle

By keeping the battery charged to a maximum of 80% and a minimum of 50%, you optimize the battery’s optimum voltage range, which helps to extend longevity.

The voltage limits (maximum and minimum) have a far more significant impact on battery life than the charging method.

If you constantly run your battery to full charge and then drain it, 100% charged to 100 % discharged; you will dramatically decrease the operational lifespan as the voltage limits are regularly achieved.

Using the wireless charger to keep the battery topped up between the 50% minimum and 80% maximum voltage range is a much better option for battery longevity and performance.

How Heat Affects Your Battery’s Lifespan

heat damge battery

All electronics operate more efficiently, from smartphones to solar panels, at cooler temperatures.

When using wireless chargers, you need to ensure you get a Qi-certified one as this provides that temperatures when charging do not rise to harmful levels.

Heat is not limited to wireless charging, and cable chargers create heat, especially if not connected properly.

So when charging your battery, please don’t leave your phone in the sun or near other devices that emit heat, and make sure it’s positioned correctly on the wireless charging pad.

If the phone (especially the iPhone) is not centered over the charging pad, it may not connect to the induction charger, and when you pick it up, it has not charged at all.

Many wireless charging pads have an indicator light that shows the phone is positioned correctly and charging.

The most significant cause of heat in a smartphone is apps that run continuously after being closed, so using power-saving apps that close or stop apps from running when not required will also help your battery life.

Many Qi-certified wireless chargers may incorporate fans to reduce temperatures while charging, and that is a great way to extend your battery’s lifespan.

There is no evidence that wireless charging leads to faster degradation of your battery.

Using Apps When Charging Will Affect The Charge Rate

using app cause low battery

Some concerns were voiced that placing your phone on a wireless charger may cause the battery to drain, but this is not the case.

This was raised as some thought that when the phone is plugged in, the battery takes a break from normal power operations; whether being charged wirelessly or by cable, the battery is still being used to power the phone.

It may take longer to charge if you are using it when charging, but rogue apps and areas with a low signal which drive the phone to use more power to hold the connection will do more to impact your battery’s longevity than the charging method.

Wireless Charging Benefits

is wireless charging bad for battery

There are some distinct advantages when opting for wireless charging, and the first one is convenience.

Many coffee shops and stores offer wireless charging stations, and when leaving the house, you don’t have to carry the charger and cable with you.

Wireless charging reduces wear and tear on the phone port and the charger itself. Wireless charging pads are not subject to plugging in and unplugging, whether to an electrical supply or the charging cable.

The connective port on a wired charger can suffer some damage and stop working, so you need to buy another, and the same is true for the charging cable.

If you can remember to utilize the optimum voltage range, shut down apps that may use too much power, and not leave your smartphone in direct sunlight while charging, using your wireless charger will maintain and extend your battery’s performance well beyond its expected lifespan.

Brett Jones
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