The most common reason your tablet charges slowly is a worn cable or power adapter, or a background app draining power while you charge

Slow charging usually comes from one of three sources: the cable or adapter is degraded, something is running on your tablet while it charges, or the charging port has lint or corrosion. The easiest way to test is to charge your tablet in airplane mode with the screen off — if it charges noticeably faster, an app or the display is the culprit. If it still crawls, the problem is the cable, adapter, or port.

Tablets draw power differently than phones. A tablet battery is larger and needs more current to charge at a normal speed. If your charger is undersized, designed for a phone, or damaged, your tablet will charge slowly even when nothing is wrong with the device itself. The same applies to cheap third-party cables — they often have higher resistance and deliver less power.

Key Takeaways

  • A worn cable or low-power adapter is the most common cause of slow charging and can be tested by swapping in the original charger if you have one.
  • Background apps, location services, and a lit screen all draw power while your tablet charges, slowing the process — airplane mode with the screen off is the fastest test.
  • Lint, dust, or corrosion in the charging port reduces electrical contact and can be cleaned with a dry toothpick or soft brush, never liquid.
  • Tablets need higher-wattage chargers than phones; using a phone charger on a tablet will always result in slow charging.
  • Battery age matters — a tablet over three years old may charge slowly because the battery itself has degraded and holds less charge capacity.

Test with the original charger and cable first

If you are using a third-party charger or a cable that came with a different device, swap back to the original charger and cable that shipped with your tablet. Charge for 30 minutes and note how hot the charger gets and how much the battery percentage rises. If the original charger is faster, the problem is your current cable or adapter.

If you no longer have the original charger, check the wattage printed on the back of your current adapter. Most tablets need 18 watts or higher to charge at normal speed. A phone charger is usually 5 to 10 watts and will charge a tablet, but very slowly. Look up your tablet model and "recommended charger wattage" to confirm what you need.

Check what is running while you charge

Turn on airplane mode, lock the screen, and plug in your tablet. Let it sit for 15 minutes without touching it. Then check the battery percentage. If it rose by 15 percent or more, your apps or the display were draining power during charging. Turn off airplane mode and charge normally — the speed should improve once you stop using the tablet.

Location services, email sync, and video apps are common culprits. Go to Settings and turn off location services while charging, or disable background app refresh for apps you do not need to update constantly. Closing all open apps before you plug in also helps. Some tablets have a "battery saver" or "low power mode" that slows charging intentionally to extend battery lifespan — check Settings to see if this is on.

Clean the charging port

Lint and dust in the charging port reduce the electrical contact between the cable and the tablet. Unplug your tablet and use a dry toothpick or a soft-bristled brush to gently scrape the inside of the port. Do this in good light so you can see what you are removing. Never use liquid, compressed air, or metal objects — these can damage the port or push debris deeper inside.

If the port looks corroded (green or white discoloration inside), the tablet may have been exposed to moisture. Corrosion cannot be cleaned away safely at home. In this case, the port may need replacement, which usually requires a repair shop. If the port looks clean but charging is still slow, move on to testing the cable.

Inspect the cable for damage

Look along the entire length of the charging cable for cracks, kinks, or exposed wires. Bend it gently near the connector ends — if the charging speed jumps when you move the cable, the wires inside are broken. A damaged cable cannot be repaired and should be replaced.

Even if the cable looks fine, it may have internal damage you cannot see. If you have access to another cable that fits your tablet (the same connector type), borrow it and charge for 30 minutes. If charging is noticeably faster with the borrowed cable, your original cable is worn and needs replacement. Buy a cable from the tablet manufacturer or a brand with good reviews — cheap cables often fail within months.

Rule out battery age and degradation

Tablet batteries degrade over time. After two to three years of regular use, a battery loses capacity and may charge more slowly because it cannot accept power as quickly as it once did. Check your tablet's battery health in Settings. On iPad, go to Settings > Battery > Battery Health & Charging and look at the Maximum Capacity percentage. On Android tablets, the battery health option varies by brand — search your tablet model and "check battery health" to find the right menu.

If the maximum capacity is below 80 percent, the battery has degraded and is the likely cause of slow charging. Battery replacement is possible but usually costs between 50 and 100 dollars at a repair shop. If your tablet is older and the battery is the only problem, replacement may not be worth the cost depending on how much you use the device.

When to seek repair

If you have tested a known-good charger, cleaned the port, and confirmed that airplane mode makes no difference, the problem is likely inside the tablet — either the charging circuit or the battery itself. At this point, a repair shop can run diagnostics to pinpoint the issue. Bring your tablet and the charger you use most often so the technician can test both.

Before you go, write down your tablet model and the year you bought it. This helps the shop estimate whether repair is worth the cost. A five-year-old tablet with a bad charging port may cost more to fix than the device is worth, while a newer tablet with the same problem is usually worth repairing.

Frequently Asked Questions

Does using my tablet while it charges make it charge slower?

Yes. The power going into the battery is reduced by the power the screen and apps are drawing. Turning off the screen and closing apps will speed up charging noticeably. Airplane mode is the fastest way to charge because it stops all wireless radios and background syncing.

Is it bad to leave my tablet plugged in overnight?

Modern tablets stop charging once the battery reaches 100 percent, so leaving it plugged in does not damage the battery. However, keeping a tablet at 100 percent for hours at a time does cause slow degradation over months and years. If you charge overnight regularly, consider unplugging once the battery is full.

Can I use a phone charger on my tablet?

Yes, but it will charge very slowly. Phone chargers are usually 5 to 10 watts, while tablets need 18 watts or more. Your tablet will charge, but it may take two to three times longer than with the correct charger. Use a phone charger only as a temporary backup.

Why does my tablet charge faster when it is cold?

Cold slows chemical reactions inside the battery, so it accepts charge more slowly at first. Once the battery warms up during charging, the speed increases. This is normal. However, charging a very cold tablet (below 32 degrees Fahrenheit) can damage the battery, so let it warm to room temperature first.

What wattage charger do I need for my tablet?

Check the back of your original charger or the tablet's manual for the wattage. Most modern tablets need 18 to 30 watts. Larger tablets and iPad Pro models may need 35 watts or higher. Using a charger with higher wattage than recommended is safe — your tablet will draw only what it needs.