The fastest way is borrowing a charger that matches your device

If your charger is lost or broken, the simplest solution is to borrow one from someone else with the same device. A charger for a phone, laptop, or tablet is designed for that specific voltage and connector type — using the wrong one can damage the battery or the device itself. Before you borrow, check that the connector shape matches exactly and that the voltage printed on the charger (usually 5V, 12V, or 20V) is the same as what your device needs.

If you don't have access to an identical charger, a replacement charger costs between $15 and $80 depending on the device. Official chargers from the manufacturer are more expensive but safer. Third-party chargers sold by retailers like Amazon or Best Buy are cheaper and usually work fine, but read the reviews first — some are slower or less reliable than others.

Key Takeaways

  • Borrowing a matching charger from someone with the same device is the safest option and takes minutes.
  • A USB power bank can charge phones and tablets if you already own one, and works without a wall outlet.
  • Replacement chargers cost $15 to $80 and are available from retailers, manufacturers, and online stores.
  • Improvised methods like car chargers or solar chargers work for some devices but are slower and less reliable.
  • Never use a charger with a different voltage or connector type — it can permanently damage your battery or device.

Using a power bank if you have one

A power bank is a portable battery that stores charge and transfers it to your device through a USB cable or built-in connector. If you already own one, it can charge your phone or tablet without needing a wall outlet. Power banks work with most phones and tablets as long as you have the right cable — USB-C, Micro-USB, or Lightning depending on your device.

The downside is that a power bank charges slowly compared to a wall charger, and it only works if the power bank itself is already charged. A typical power bank holds enough charge for one full phone charge, sometimes less. If your power bank is also dead, you're back to needing a wall charger to revive both devices.

Charging through a car charger or USB port

A car charger plugs into your vehicle's 12-volt outlet (the cigarette lighter socket) and has a USB port where you can connect your phone or tablet. This works if you have access to a car and a compatible cable. Car chargers are inexpensive ($10 to $25) and useful to keep in your vehicle, but they charge slowly — usually half the speed of a wall charger — because the car's electrical system delivers power more slowly.

You can also charge some devices by connecting them to a USB port on a computer, printer, or other device with a USB-A port. This is very slow and only works if your device supports charging through USB. Laptops and tablets usually won't charge this way because they need more power than a standard USB port provides.

Solar chargers and other improvised methods

A solar charger uses sunlight to generate electricity and charge your device. These are useful if you're outdoors with no access to power, but they're slow — a full charge can take 8 to 12 hours in direct sunlight, or much longer on cloudy days. Solar chargers are also expensive ($30 to $100) and only worth buying if you regularly spend time away from outlets.

Some people try to charge batteries by wrapping them in foil, using a lemon battery, or other improvised methods they find online. These don't work for modern phones, tablets, or laptops. They may have worked for straightforward devices decades ago, but today's batteries have built-in safety circuits that require a proper charger to function. Attempting improvised charging can damage the battery permanently or cause it to overheat.

What happens if you use the wrong charger

Using a charger with the wrong voltage is dangerous. If the voltage is too high, it can overheat the battery and cause it to swell, leak, or catch fire. If the voltage is too low, the device won't charge at all or will charge so slowly that it appears broken. The connector type also matters — forcing the wrong connector into your device can bend the pins inside and break the charging port permanently.

The safest approach is to check the voltage and connector type before plugging anything in. The voltage is printed on the charger itself, usually near the bottom. The connector type is visible on the end of the cable — USB-C is oval-shaped, Micro-USB is rectangular and small, and Lightning (Apple) is rectangular with eight pins in two rows.

Where to buy a replacement charger quickly

If you need a charger today, electronics retailers like Best Buy, Walmart, and Target stock replacement chargers for phones and tablets. They usually have them in stock and you can pick one up within an hour. Online retailers like Amazon offer faster shipping if you have Prime membership, but standard shipping takes several days.

The manufacturer's website (Apple, Samsung, Google, etc.) sells official chargers but usually charges more and takes longer to ship. Third-party chargers from brands like Anker, Belkin, or RavPower are cheaper and often faster to ship, and they work reliably if they have good reviews. Avoid chargers with no reviews or very low ratings — they're often counterfeit or unsafe.

Frequently Asked Questions

Can I charge my phone with a laptop charger?

Only if the laptop charger has a USB port on it. If it does, you can use a USB cable to connect your phone. If it's a barrel connector (the round plug that goes into the laptop), don't use it — the voltage is too high and will damage your phone's battery.

How long does it take to charge with a power bank?

A typical power bank charges a phone to 50% in 30 to 45 minutes, and to 100% in 60 to 90 minutes. This is slower than a wall charger because power banks deliver less power. The exact time depends on the power bank's capacity and your phone's battery size.

Is it safe to charge my phone overnight with a borrowed charger?

Yes, as long as the charger matches your device's voltage and connector type. Modern phones and chargers have safety circuits that stop charging once the battery is full, so leaving it plugged in overnight won't damage the battery. Older devices sometimes had this problem, but it's not an issue with phones made in the last ten years.

What's the difference between a fast charger and a regular charger?

A fast charger delivers more power (measured in watts) to your device, so it charges the battery in less time. A regular charger might be 5W and take two hours to fully charge a phone, while a fast charger might be 20W or 30W and do it in 45 minutes. Fast chargers cost more but are worth it if you charge frequently.

Can I use a charger from a different brand if the connector matches?

If the voltage matches and the connector is the same, it usually works fine. Many phones use standard USB-C connectors, so chargers from different brands are interchangeable. Check the voltage printed on both chargers to be sure — if they match, it's safe to use.