Sony VAIO VGP-BPS26A Replacement Battery 11.1V 4400mAh
This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.
WECARE5
Check that your old battery model number and device model to match our description. This makes sure they work together.
We ship your order same day if you buy it before 4 PM EST.
Sony VAIO VGP-BPS26A Replacement Battery 11.1V 4400mAh - is backordered and will ship as soon as it is back in stock.
Let customers speak for us
Send Your Battery Photo
Expert Technician Help
Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
POST YOUR BATTERY IMAGE
Product & Solutions Expert
✉ sales@batteryweb.com
Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Sony VAIO VGP-BPS26A Replacement Battery 11.1V 4400mAh - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
4400mAh
Sony VAIO VPC-CA Series — 11.1V Li-ion Replacement Battery (VGP-BPS26A)
This is an 11.1V, 4400mAh (48.84Wh) lithium-ion replacement battery for the Sony VAIO VPC-CA series notebooks. It fits the VPC-CA16EC, VPC-CA17EC, VPC-CA18EC, VPC-CA26EC, and over 660 additional VAIO models that share the same battery bay and connector. OEM part numbers covered include VGP-BPS26A, VGP-BPS26, and VGP-BPL26.
- VAIO VPC-CA platform compatibility: These CA-series models share a unified 11.1V three-cell battery rail, a common 272mm bay form factor, and the same BMS handshake protocol — which is why a single cell works across all of them without firmware conflicts.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on VPC-CA hardware. The BMS completed full charge acceptance without triggering overvoltage cutoff, and the protection circuit responded correctly to load fluctuations at the cell level.
- Post-install calibration on the VAIO VPC-CA: After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.
Why the VAIO VPC-CA reports poor battery health immediately after a replacement
The VAIO's BIOS reads health data from EEPROM stored on the battery's BMS — not from live cell measurements. When a new cell arrives, that EEPROM carries fresh default values that don't match the charge history the BIOS expects to see. The result is a "poor health" or "replace battery" warning even though the cell is brand new. One full discharge-to-hibernate followed by an uninterrupted charge to 100% lets the BIOS rewrite its learned capacity baseline against the new cell's actual chemistry.
VAIO VPC-CA shutting down at 20–30% charge shown on screen
This happens when the cell voltage drops sharply under combined CPU and display load — what's called a voltage cliff. The fuel gauge IC estimates remaining capacity under light load, but the BIOS pulls the plug when actual cell voltage falls below the protection threshold during a heavy-draw spike. It is not a BMS fault or a firmware lock. Run two full calibration cycles — discharge to hibernate cutoff, charge to 100% uninterrupted — and the fuel gauge IC will map the new cell's discharge curve accurately. After calibration, the reported percentage and actual shutdown point will align.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Sony
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My VAIO shows the battery as 0% or "unknown" right after I installed the new cell — is it dead?
No. The VAIO's fuel gauge IC has no charge history for the new cell yet, so it reports 0% or an unknown state until it completes at least one full cycle. Discharge the laptop normally until it hibernates, then charge uninterrupted to 100% without interruption. After one complete cycle the fuel gauge IC maps the cell correctly and the percentage reads accurately.
Windows Battery Report is showing the wrong Wh rating for this replacement — it says something completely different from the label.
The Wh figure Windows pulls comes from the EEPROM on the battery's BMS, not from a live measurement of the cell. The EEPROM rated value reflects the original factory chemistry spec, which can differ from the actual cell capacity once chemistry tolerances are factored in. This is a data mismatch between the EEPROM record and the physical cell — it does not affect how the battery charges or discharges. After two full calibration cycles the reported design capacity in Windows Battery Report will converge closer to the actual 48.84Wh spec.
The new battery stopped charging at 80% and won't go higher — is the cell faulty?
Not necessarily. Sony VAIO firmware on several VPC-series models includes a BIOS-controlled charge limit that caps charging at 80% to reduce long-term cell stress — it is a firmware setting, not a battery fault. Check VAIO Control Center under the Power Management or Battery Care section; there is a toggle between "Standard" and "Maximum Battery Life" modes. Switch to Standard mode and the charge ceiling lifts back to 100%.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
