The Beats Solo 4 charges with a USB-C cable, not a Lightning connector

The Beats Solo 4 uses a USB-C port on the left ear cup to charge. This is different from older Beats models and different from iPhones with Lightning ports. You need a USB-C to USB-A cable (the kind that comes with most Android phones and newer laptops) or a USB-C to USB-C cable. The headphones come with a USB-C cable in the box, so you do not need to buy one separately unless you lose it.

Plug the cable into the USB-C port on the left ear cup, then plug the other end into any USB power adapter — the kind you use for phones, tablets, or laptops. A standard 5-watt adapter works fine. The headphones do not come with a power adapter, so you will use one you already own.

A full charge takes about 30 to 40 minutes. You will see a light on the ear cup turn on while charging. When the light turns off or stops blinking, the headphones are fully charged.

Key Takeaways

  • Beats Solo 4 charges through a USB-C port on the left ear cup, not a Lightning port.
  • Use any USB-C cable and any standard USB power adapter you already own — the cable comes in the box.
  • A full charge takes 30 to 40 minutes, and a light on the ear cup shows when charging is complete.
  • Fully charged Solo 4 headphones last up to 40 hours of listening time.

Where the USB-C port is located

The USB-C charging port sits on the left ear cup, near the bottom edge. It is a small rectangular opening. If you are wearing the headphones, the left ear cup is on your left ear. The port is recessed slightly into the plastic, so the cable connector sits flush against the ear cup when plugged in.

The cable that comes in the box is about 3 feet long, which gives you enough reach to charge while using the headphones if you want to, though most people charge them while not wearing them. Keep the cable in a safe place — if you lose it, you will need to buy a replacement USB-C cable, which costs $15 to $25 depending on the brand and length.

What power adapter to use

Any USB power adapter with a USB-A port (the rectangular port on most phone chargers) works with the included USB-C cable. If you have a newer adapter with a USB-C port, you can use a USB-C to USB-C cable instead. The headphones do not require a high-power adapter — a standard 5-watt adapter is enough, and most phone chargers are 18 watts or higher, so any charger you own will work.

You can also charge the Solo 4 by plugging the USB-C cable into a laptop, desktop computer, or any device with a USB port. Charging from a computer is slower than charging from a wall adapter, but it works. Do not use a charger rated for more than 30 watts, as this can damage the battery over time, though most standard phone chargers are well within this range.

How to know when the headphones are fully charged

While charging, a light on the left ear cup will turn on. The light is usually white or amber depending on the charge level. When the headphones reach full charge, the light turns off or stops blinking. This takes 30 to 40 minutes from a completely dead battery.

You can also check the charge level by holding down the power button for a few seconds — the headphones will announce the battery percentage out loud. If you have the Beats app installed on your phone, it also shows the battery level in the app, updated whenever the headphones are connected to your phone via Bluetooth.

Battery life after a full charge

Once fully charged, Beats Solo 4 headphones last up to 40 hours of continuous listening. In real use, most people get 30 to 35 hours before needing to charge again, depending on volume level and whether you use noise cancellation. With noise cancellation turned on, battery life drops to about 36 hours.

The battery degrades slowly over time — after one or two years of regular charging, you may notice the headphones do not last quite as long on a full charge. This is normal for rechargeable batteries. If the battery life drops to less than half the original time, the battery may need replacement, which Beats handles through their support page or an Apple Store.

Troubleshooting a charging problem

If the headphones do not charge, first check that the USB-C cable is fully inserted into the port on the left ear cup. The connector should sit flush. Try a different USB power adapter — sometimes an adapter fails without warning. If you have access to another USB-C cable, try that as well, since cables can fray or break inside the sheath even if they look fine on the outside.

If the light does not turn on after 5 minutes of charging with a different cable and adapter, the charging port or battery may be damaged. Contact Beats support through their website or visit an Apple Store, since Beats is owned by Apple. Do not try to clean the port with metal objects, as this can cause a short circuit. If you see debris in the port, use a wooden toothpick or plastic pick to gently remove it.

Keeping the battery healthy over time

Rechargeable batteries last longer if you do not let them completely drain very often. Try to charge the Solo 4 when the battery reaches 20 percent rather than waiting until they shut off. You do not need to charge them to 100 percent every time — charging to 80 percent and using them until 20 percent is gentler on the battery than full cycles.

Avoid leaving the headphones in hot places, like a car in the sun or near a heater. Heat degrades lithium batteries faster than normal use. If you are not going to use the headphones for more than a month, charge them to about 50 percent and store them in a cool, dry place. This keeps the battery in a stable state while you are not using them.

Frequently Asked Questions

Can I use a fast charger with Beats Solo 4?

Yes, fast chargers work fine with Solo 4. The headphones have built-in protection that prevents overcharging, so a 30-watt, 65-watt, or even 100-watt charger will not damage them. The charging speed stays the same — about 30 to 40 minutes — because the headphones only draw the power they need, regardless of the adapter's maximum output.

What if I lost the USB-C cable that came in the box?

You can buy a replacement USB-C cable from any electronics store, online retailer, or Apple Store. Look for a standard USB-C to USB-A cable or USB-C to USB-C cable, depending on what power adapters you have. Prices range from $10 to $25. You do not need a cable made specifically for Beats — any quality USB-C cable works.

Do Beats Solo 4 charge wirelessly?

No, the Solo 4 only charges with a wired USB-C cable. There is no wireless charging option. If you want wireless charging, you would need a different Beats model or headphones from another brand that supports it.

Can I charge the headphones while wearing them?

Yes, you can wear the Solo 4 while they charge. The cable is long enough to reach from the left ear cup to a nearby power adapter. However, most people find it more comfortable to charge them while not wearing them, since the cable can get in the way or tug on the ear cup.

How often should I charge Beats Solo 4?

With 40 hours of battery life, most people charge them once a week or once every two weeks, depending on how much they listen. If you use them every day for several hours, charge them once or twice a week. If you use them occasionally, you may only need to charge them once a month.