Sony VAIO VPC-EA20 Replacement Battery 11.1V 4400mAh
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Sony VAIO VPC-EA20 Replacement Battery 11.1V 4400mAh - 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.
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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.
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Disclaimer
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Sony VAIO VPC-EA20 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-EA20 / VPC-EB / VPC-EC Series — 11.1V Li-ion Replacement Battery (VGP-BPS22)
This is an 11.1V, 4400mAh (48.84Wh) Li-ion replacement battery for the Sony VAIO VPC-EA20, VPC-EB10, VPC-EB20, VPC-EC20, and over 160 additional VAIO models. It replaces OEM part numbers VGP-BPS22, VGP-BPS22A, VGP-BPL22, VGP-BPS22/A, and VGP-BPS22A/P. Install it when the original cell no longer holds a useful charge or the VAIO refuses to run on battery at all.
- VPC-EA / VPC-EB / VPC-EC platform fit: These three series share the same 11.1V three-cell battery architecture, identical connector pinout, and the same BMS handshake protocol — which is why a single part number covers all of them. Swapping within the family requires no firmware change or hardware modification.
- Bench tested on actual hardware: We ran this cell on a VPC-EB unit. The BMS accepted charge immediately, the fuel gauge IC initialised correctly within the first full cycle, and the protection circuit tripped at the expected low-voltage threshold without a hard shutdown at mid-charge.
- First cycle after installation: After fitting, run the laptop down to hibernate cutoff on battery — do not plug in early — then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap on VAIO hardware.
Why the VAIO BIOS reports poor battery health immediately after replacement
The VPC series BIOS stores battery health data in EEPROM and compares it against the new cell's reported state on first boot. Because the replacement cell has no charge history written to it, the BIOS flags it as degraded or unknown — not because anything is wrong, but because the learn cycle hasn't run yet. One full discharge-to-hibernate followed by an uninterrupted charge to 100% writes the baseline data the BIOS expects. After one or two cycles, the health indicator corrects itself without any driver or firmware intervention.
VAIO shutting down at 20–30% charge shown on the indicator
This symptom almost always points to the fuel gauge IC still running calibration data from the old, degraded cell — not a fault with the new battery. Under combined CPU and display load, the voltage drops faster than the uncalibrated gauge predicts, and the BMS cuts power before the displayed percentage reaches zero. Run two full discharge-to-hibernate cycles back-to-back, charging fully between each. After the second cycle, the fuel gauge IC recalibrates against the actual voltage curve of the new cell and the early shutdowns stop. If the issue persists after two cycles, check the BIOS battery report — a correctly recalibrated cell will show capacity above 4000mAh at 11.1V nominal.
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 put the new one in — is it dead?
No. The BIOS on VPC-series laptops reads EEPROM data stored by the previous cell and flags any new cell as unknown until a learn cycle runs. Plug the laptop in, let it charge to 100% uninterrupted, then run it down fully to hibernate on battery. That single cycle writes the baseline data the BIOS needs and clears the unknown status.
Windows is showing this battery as 38Wh but the battery is listed as 48.84Wh — why is the Wh rating wrong in system info?
The Wh figure Windows displays is pulled from EEPROM data on the cell, and on a freshly installed replacement that data reflects a conservative factory-rated value rather than the actual chemistry capacity. After the BIOS completes one full learn cycle — full discharge to hibernate, then full uninterrupted charge — the reported Wh figure updates to match the actual cell capacity. No driver update or BIOS flash is needed.
The new battery charges to about 80% then stops — the indicator just stays there.
This is a BIOS-controlled charge limit, not a cell fault. Sony's power management firmware on several VPC models activates a charge ceiling when it detects a "new" or uncalibrated battery to protect the cell during initial cycles. Go to Sony's VAIO Control Center (if installed) or check the power settings under the BIOS — look for a "Battery Care Function" or charge limit toggle and set it to full charge mode. If that setting isn't present, the ceiling lifts automatically after the first completed calibration cycle reaches 100%.
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