Sony VAIO VPC-CA16EC Replacement Battery 11.1V 6600mAh
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Sony VAIO VPC-CA16EC Replacement Battery 11.1V 6600mAh - is backordered and will ship as soon as it is back in stock.
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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
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Sony VAIO VPC-CA16EC Replacement Battery 11.1V 6600mAh - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
6600mAh
Sony VAIO VPC-CA Series — 11.1V Li-ion Replacement Battery (VGP-BPS26A)
This is an 11.1V, 6600mAh (73.26Wh) Li-ion battery for the Sony VAIO VPC-CA series, including the VPC-CA16EC, VPC-CA17EC, VPC-CA18EC, and VPC-CA26EC among hundreds of compatible models. It replaces OEM part numbers VGP-BPS26A, VGP-BPS26, and VGP-BPL26. Install it when the original cell no longer holds a charge or the laptop has become effectively desk-bound.
- VAIO VPC-CA series compatibility: All VPC-CA variants share the same 11.1V three-cell rail, identical connector pinout, and the same BMS handshake protocol — that is why one battery covers the full range without modification.
- Bench tested on actual hardware: We ran this cell on a VPC-CA26EC and confirmed the BMS negotiated correctly with the VAIO EC firmware, charge acceptance reached full rated capacity, and no protection trips occurred across the full charge-discharge cycle.
- Post-install calibration cycle: After fitting this cell, run the laptop on battery until it hibernates from low charge, then charge uninterrupted to 100% before using it again. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
BIOS reporting poor battery health immediately after a fresh cell install
The VAIO BIOS reads health data from the battery's EEPROM, which stores the charge history of the old cell. When a new cell is fitted, that EEPROM data does not match actual capacity yet, so the BIOS flags the battery as degraded or unknown. This is a data mismatch, not a fault with the replacement cell. Running one complete discharge-to-hibernate followed by a full uninterrupted charge allows the BIOS to rewrite its learned capacity baseline and clear the warning.
Laptop shuts down hard at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet calibrated to the new cell's voltage curve. The gauge reports 20–30% remaining, but the actual cell voltage has already dropped below the BIOS cutoff threshold under combined CPU and display load. The VAIO does not step down gracefully — it cuts power immediately to protect the cell. Run two full calibration cycles and the gauge IC will align its readings to the real voltage floor; shutdowns will stop occurring above the 5% warning threshold.
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
The VAIO BIOS shows the new battery as "unknown" or 0% right after I installed it — is the cell dead?
The cell is not dead. The BIOS is reading stale EEPROM data from the old battery and has not yet learned the new cell's capacity profile. Run the laptop on battery until it hibernates from a low-charge cutoff, then charge uninterrupted to 100%. After that first full cycle, the BIOS rewrites its health baseline and the unknown status clears.
My fuel gauge jumps around wildly — showing 60%, then 40%, then 75% — on the new battery. What's wrong?
The fuel gauge IC inside the laptop calibrates itself against a cell's voltage curve over several cycles. A brand-new cell presents a voltage curve the IC has never seen, so readings are erratic until it builds an accurate model. This is not a fault with the battery. Run two to three full discharge-to-hibernate and charge-to-100% cycles and the gauge will stabilise.
System information shows the wrong Wh rating — the laptop reports 48Wh but the battery is rated 73.26Wh. Why?
The Wh figure in system info is pulled from the battery's EEPROM, which stores the rated capacity of the original OEM cell that shipped with the laptop. The EEPROM value does not automatically update to reflect the new cell's chemistry. The actual usable energy is 73.26Wh as rated; the discrepancy is a display artefact, not a capacity loss. After one full calibration cycle, the BIOS-learned value will move closer to the real figure.
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