CMOS Battery Repair & Replacement
A coin-sized CR2032 battery that keeps BIOS time and settings active when the laptop is off.
Service Details
Common CMOS Battery Failures
Cell discharge after 4-5 years of usage.
Warning Signals & Symptoms
- error Laptop clock and date reset every time you boot
- error System displays 'CMOS Checksum Error' on startup
- error BIOS custom profiles keep reverting to default
Professional Diagnostic Method
Check step
Measure battery cell output voltage (needs to be above 3V)
Check step
Test CMOS memory retention when main battery is removed
Check step
Inspect battery holder terminal pins
Repair & Replacement Solution
Desoldering old cell or replacing the coin-cell battery with a fresh CR2032 battery.
Estimated Cost Guideline
| Service Type | Price Range |
|---|---|
| Diagnostics & Doorstep Visit | FREE (with repair) |
| CMOS Battery Standard Repair/Replacement | ₹300 - ₹700 |
Note: Cost estimate is dynamic and varies depending on exact laptop brand and model configurations. Contact us for a precise quote.
Frequently Asked Questions
help How long does a CMOS battery last?
Usually around 4 to 6 years. Once depleted, the system clock will lose track of time.
help Will a dead CMOS battery stop my laptop from starting?
In some models, a completely dead CMOS battery causes startup loops or blank screens on boot.
Need Immediate Assistance?
Book a certified engineer visit to your home or office in Hyderabad today. We service all major brands: Dell, HP, Lenovo, ASUS, Acer, and Apple MacBooks.
Hyderabad Coverage Areas
We support doorstep collection and diagnostics in Secunderabad, Ameerpet, Madhapur, Gachibowli, Kukatpally, Banjara Hills, Jubilee Hills, and more.
Brand-Specific CMOS Battery Services
Select a laptop brand to view custom troubleshooting steps and pricing for cmos battery services:
Common Failures Related to CMOS Battery
Read our diagnostic guides to troubleshoot issues associated with a faulty cmos battery: