What to do when you don't have your cable
If your iPhone battery is low and your charger is missing, broken, or left behind, you have real options that work right now. The fastest route is to borrow a USB-C or Lightning cable from someone nearby — most people carry one, and any recent iPhone uses the same connector. If that is not possible, a wireless charging pad (if your iPhone supports it) works without a cable, a car charger can charge while you drive, or a portable battery pack can charge your phone anywhere.
The method you choose depends on what you have access to and how quickly you need power. Some options charge faster than others, and some work only if your phone has the right hardware. This guide covers what actually works and what to expect from each option.
Key Takeaways
- Borrowing a USB-C or Lightning cable from another person is the fastest and cheapest option if someone nearby has one.
- Wireless charging pads work on iPhone 8 and newer models without needing a cable, but charge more slowly than wired options.
- A portable battery pack (power bank) lets you charge anywhere and works with any iPhone if you have the right cable.
- Car chargers plug into your vehicle's 12-volt outlet and are useful if you spend time driving or have one already.
- Charging from a computer's USB port works but is very slow and may not charge a dead battery at all.
Borrowing a cable from someone else
This is your fastest option. Ask anyone with an iPhone 15 or newer (they use USB-C), or anyone with an iPhone 14 or older (they use Lightning). The cable works with any iPhone of the same generation — a USB-C cable from an iPhone 15 works with any other iPhone 15, and a Lightning cable from an iPhone 12 works with any iPhone 12, 13, or 14.
If you borrow a cable, you still need a power adapter (the brick that plugs into the wall) or a computer with a USB port. Most people have a spare adapter at home, in a car, or at work. If you are at a friend's house, their charger will work with your phone as long as the cable matches. If you are at a coffee shop or library, ask the staff — many locations have chargers available to borrow.
This method charges your phone at full speed (the fastest your iPhone supports) and takes 30 minutes to two hours depending on how dead the battery is and which iPhone model you have.
Using a wireless charging pad
If your iPhone is an iPhone 8 or newer, it supports wireless charging. You do not need a cable — just place your phone face-up on a wireless charging pad, and it will start charging. The pad itself plugs into a wall outlet with a standard USB cable.
Wireless charging is slower than a cable. A full charge typically takes two to three hours instead of one to two hours with a wired charger. The phone also gets warmer during wireless charging, which is normal but means it charges even more slowly if the phone is already hot from use.
Wireless pads are common in offices, coffee shops, airports, and hotels. If you are stuck without a charger, ask if the location has a wireless pad you can use. If you do not have one at home, they cost between $15 and $50 depending on the brand and whether it charges multiple devices at once.
Charging from a portable battery pack
A portable battery pack (also called a power bank) is a small device that stores power and charges your phone anywhere. You carry it with you, and when your phone battery is low, you connect your phone to the pack with a cable. The pack transfers its stored power to your phone.
To use one, you need a portable pack that has a USB-C or Lightning port (depending on your iPhone model) or a USB port where you can plug in your cable. Most packs sold today have USB-C, which works with iPhone 15 and newer. If you have an older iPhone, you need a pack with a Lightning port or a USB port plus your Lightning cable.
Portable packs range from small (fits in a pocket, charges your phone once) to large (charges your phone three to five times). They cost between $20 and $80. The advantage is that you can charge anywhere — in a car, on a plane, in a waiting room — without needing a wall outlet. The disadvantage is that you have to own one and remember to charge the pack itself.
Charging from a car charger
If you spend time driving, a car charger plugs into your vehicle's 12-volt outlet (the round socket on the dashboard, sometimes called a cigarette lighter socket) and charges your phone while you drive. Some newer cars have USB ports built into the dashboard instead — you can plug a cable directly into those.
Car chargers cost between $10 and $30 and come with a USB port where you plug in your cable. They charge at full speed, so your phone gains power as fast as it would from a wall charger. If you do not have one, you can buy one at any gas station, convenience store, or online retailer.
This option only helps if you are in a car and have time to drive. It is useful if you commute or take road trips, but it does not solve the problem if you are at home or at work without a charger.
Charging from a computer USB port
A computer's USB port can charge an iPhone, but very slowly. A standard USB port on a desktop or laptop provides much less power than a wall charger — your phone might gain 5 to 10 percent battery per hour instead of 20 to 30 percent. If your battery is completely dead, the phone may not charge at all from a computer port because it needs a minimum amount of power to turn on.
This method works only if you have a computer nearby and a USB cable that matches your iPhone (USB-C for iPhone 15 and newer, Lightning for older models). Plug the cable into any USB port on the computer, then plug the other end into your phone. Leave it connected for as long as you can.
Use this option only as a last resort when nothing else is available. It is better than nothing if you have several hours to wait, but it will not get your phone to a useful charge level quickly.
What not to do
Do not use a charger from a different phone brand unless it has the exact same connector. An Android charger with a USB-C port will work with an iPhone 15 (which also uses USB-C), but an older Android charger with a micro-USB port will not work with any iPhone. Using the wrong connector can damage your phone's charging port.
Do not leave your phone in direct sunlight while charging, and do not charge it while it is very hot from use. Heat slows charging and can damage the battery. If your phone is hot, let it cool down for 15 to 30 minutes before you charge it, even if the battery is very low.
Do not buy a charger from an unknown seller online without checking reviews. Cheap, counterfeit chargers can damage your phone's battery or charging port. Stick with chargers from Apple, major electronics retailers, or well-reviewed third-party brands.
Frequently Asked Questions
Can I charge my iPhone with an Android charger?
Only if it has a USB-C port. iPhone 15 and newer use USB-C, so any USB-C charger works — including Android chargers. Older iPhones use Lightning connectors, which are Apple-only. Never force a different connector into your phone's port.
How long does it take to charge an iPhone wirelessly?
A full charge from wireless charging takes two to three hours, compared to one to two hours with a wired charger. Wireless charging is slower because it transfers power less efficiently. If your phone is hot, it will charge even more slowly.
Will charging my iPhone overnight damage the battery?
Modern iPhones stop charging at 100 percent and hold that level without overcharging, so overnight charging is safe. However, keeping your phone plugged in constantly does cause the battery to age faster over months and years. Unplugging when the charge reaches 100 percent is better for long-term battery health.
Can I use a fast charger on my iPhone?
Yes. iPhones support fast charging with chargers rated 20 watts or higher. A faster charger will not damage your phone — it will straightforward charge your phone at the speed your iPhone supports. Using a slower charger just takes longer.
What should I do if my charging port is damaged?
If your iPhone will not charge from any cable or wireless pad, the charging port or wireless charging coil may be damaged. Wireless charging pads are your best option if the port is broken. If wireless charging does not work either, you will need to have the phone repaired by Apple or a certified repair shop.