"My battery used to last a full day, now it barely makes it to lunch." We hear a version of this every single day at our service centre. A weak battery doesn't just mean more charging — it can cause random shutdowns, slow performance, and in worse cases, dangerous swelling. Here's our full mobile battery replacement service in Chennai.

Common Signs You Need a Battery Replacement

  • Battery draining much faster than it used to, even with light use
  • Phone shutting down suddenly above 20% charge
  • Battery health reading below 80% (Settings → Battery Health on iPhone)
  • Visible swelling — a back panel or screen that looks slightly lifted
  • Phone overheating during normal use or charging

Our Battery Replacement Process

  • Free battery health check — we test capacity, charge cycles and physical condition first.
  • Quote confirmation — an exact price for your exact model, before we open the device.
  • Safe removal — old batteries, especially swollen ones, are removed carefully to avoid damage.
  • New battery fitting — a genuine manufacturer-grade cell is installed and seated correctly.
  • Calibration & testing — we verify charge percentage accuracy and run a charge/discharge test before handover.
"If your phone is over 2 years old and drops below 20% by early afternoon with normal use, it's usually the battery itself — not your habits."

Genuine Battery Parts We Use

We only fit genuine manufacturer-grade tested battery cells — never uncertified duplicates that degrade fast or pose safety risks. The exact device model of the battery and its capacity will be checked for the voltage distribution before the installation.

Repair Time

Most battery replacements are completed within 60–90 minutes while you wait at our service centre.

Warranty on Battery Replacement

Every battery replacement comes with a 90-day service warranty covering the battery and the workmanship, backed by a physical warranty card.

Why Choose Chennai TechFix for Battery Replacement

Battery replacement starts from ₹1,299 depending on your phone brand and model — confirmed after a free health check, not guessed. If you're unsure whether it's a software issue or the battery itself, our diagnosis settles that for free before you spend a rupee.

Not sure if it's your battery or something else? We'll check for free.

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Frequently Asked Questions

Battery replacement starts from ₹1,299 depending on your phone model. Share your model on WhatsApp for a free, exact quote.

Rapid drain, sudden shutdowns above 20%, swelling, or a battery health reading below 80% are all strong signs it's time for a replacement.

No. A swollen battery is a safety risk and should be replaced immediately — stop using and charging the device until it's checked.

Every battery replacement includes a 90-day service warranty covering the battery and the workmanship.

Battery drain is rarely one single cause — but once it crosses the two-year mark and you're charging more than once a day, replacement is almost always the most cost-effective fix. Bring it in for a free health check.