Does your laptop's charge no longer last like it used to, drain quickly, or shut down the moment you unplug it? Maybe the touchpad area has bulged slightly. All of these signal it's time for a battery replacement. At Kariyer Bilgisayar, based in central Pendik (Çarşı), we replace batteries for every laptop brand and model. This guide explains when your battery should be replaced, the danger of a swollen battery and why the correct battery matters.

When Should a Laptop Battery Be Replaced?

If one or more of these signs is present, your battery is worn out:

  • Charge drains very fast: A battery that once lasted hours now runs out quickly.
  • Percentage sticks or drops suddenly: Shutting down abruptly at 50%, or the percentage jumping around.
  • "Consider replacing your battery" warning: Windows' battery health notification.
  • Works plugged in, dies without power: On with the adapter, off instantly when unplugged.
  • Swelling signs: The touchpad bulging, the case opening up, the device not sitting flat.

A Swollen Battery Is Dangerous — Stop Using It

Let's be clear: a swollen lithium battery is a safety risk. Swelling pushes the touchpad up, deforms the keyboard and case, and at advanced stages carries a risk of overheating and fire. If your device's battery is swelling:

  • Don't leave it charging for long periods,
  • Don't press/flatten or puncture it,
  • Turn it off and bring it to service as soon as possible.

We safely remove the swollen battery and replace it with a proper, sound one.

Choosing the Right Battery: Compatibility Is Essential

With battery replacement, the "any battery that fits will work" logic is wrong. The wrong battery causes issues from not charging at all to sudden shutdowns. To identify the correct battery, we check:

  • Voltage (V) and capacity (mAh/Wh): The voltage the mainboard expects must match exactly; capacity determines runtime.
  • Connector type and pin count: The socket shape and cable position vary by model.
  • Physical size and model code: Even within the same series, battery codes can differ; the correct part number is critical.
  • Internal / removable design: On modern ultrabooks the battery is internal, requiring disassembly.

We identify and fit an original or fully compatible battery for your device. If there are other symptoms such as display or cable issues, we cover them in detail in our notebook repair and maintenance guide and our cracked screen replacement article.

Pre-Delivery Testing and Calibration

We don't hand the device back right after fitting a new battery — first we check:

  • That the battery is correctly detected and its health values read,
  • A charge/discharge test to confirm the battery truly holds a charge,
  • Battery calibration when needed so the percentage indicator works correctly,
  • Stable operation without the adapter.

We only deliver your device, fully working, after these tests.

How Long Does a Battery Replacement Take?

For common models with the battery in stock, replacement is usually completed the same day. To be honest, depending on workload or sourcing a rare/special battery, the process can sometimes roll over to the next day. After diagnosis we inform you of the battery status and a clear delivery time.

Battery Replacement for Every Brand and Model

We work brand-independently. Some brands we frequently replace batteries for:

  • Asus, HP, Lenovo, Acer, Dell, MSI
  • Casper, Monster, Apple (MacBook), Huawei
  • Toshiba, Samsung, Sony, Packard Bell and others

Bonus: Ways to Extend Battery Life

To make your new battery last longer:

  • Instead of keeping the device plugged in at 100% all the time, use it occasionally in the 20-80% range.
  • Avoid very hot environments and direct sunlight; heat is what wears batteries the most.
  • Use an original or compatible adapter.
  • If you won't use it for a long time, store the device at around 50% charge.

Why Kariyer Bilgisayar in Pendik?

  • Central location: In central Pendik (Çarşı) — easy to drop off and pick up.
  • Compatible-battery assurance: Fitted after checking voltage, capacity and connector compatibility.
  • Guaranteed workmanship and battery.
  • Transparent process: No work or charge without your approval.
  • Online tracking: Follow the process with your tracking code on our service tracking page.

Besides central Pendik, we also serve Kurtköy, Kaynarca, Kartal and Gözdağı. See our other services on the services page.

Frequently Asked Questions

Can I keep using my laptop with a swollen battery?

No, it's not recommended. A swollen lithium battery is a safety risk that causes overheating and deformation. Turn the device off and have the battery replaced as soon as possible.

Is the battery you fit original?

We fit an original or fully compatible battery (same voltage, suitable capacity and connector) and test it before delivery.

Will a battery replacement harm my data?

No. Battery replacement doesn't touch your disk; your data stays intact. Still, if you have valuable data, we recommend backing up before any service.

Is the replacement finished the same day?

For common models it's mostly completed the same day. Depending on workload or special battery sourcing it can occasionally roll to the next day; we give a clear timeframe after diagnosis.

Renew Your Battery Safely in Pendik

Swollen battery, fast-draining charge or sudden shutdowns — whatever the problem, the Kariyer Bilgisayar Pendik Çarşı team is here with the correct, compatible battery for every brand and model. For a free initial assessment, message us on WhatsApp or call our landline at 0216 379 99 72.