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Sony VAIO PCG-GRX1P Replacement Battery 14.8V 2600mAh Li-ion

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From $58.99 USD $72.99
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Fits Sony VAIO PCG-GRX1P and PCG-R505 series; replaces PCGA-BP2R.
14.8V 2600mAh lithium-ion cell delivers 38.48Wh for processor, display, and peripherals.
Connector slides straight into the bay with locking tab; orientation matches original housing.
We ran full charge cycles on test units; BMS held 14.8V under sustained load without early cutoff.
After installation, discharge fully to hibernation then charge uninterrupted to 100% to reset the BIOS battery learn cycle and clear inaccurate health warnings.
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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

🔹 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: 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.

Voltage

14.8V

Amp

2600mAh

Sony VAIO PCG-GRX1P / PCG-R505 Series — 14.8V Li-ion Replacement Battery (PCGA-BP2R)

This is a 14.8V, 2600mAh (38.48Wh) Li-ion replacement battery for the Sony VAIO PCG-GRX1P and PCG-R505 series laptops. It covers models running OEM part numbers PCGA-BP2R, PCGA-BPZ51, PCGA-BPZ52, and PCG-Z505. If your original pack has degraded or fails to hold a charge, this cell replaces it directly.

  • PCG-GRX1P and R505 series compatibility: These models share the same 14.8V battery rail, connector pinout, and BMS handshake protocol — one cell covers the full range without firmware conflicts or connector modifications.
  • Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a VAIO PCG-R505 unit. The BMS accepted the cell without faulting, charge termination triggered correctly at full capacity, and protection circuitry responded normally to load changes.
  • Post-install calibration on the PCG series: After fitting this battery, 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 these Sony VAIO models.

BIOS reporting poor battery health immediately after replacement

Sony VAIO notebooks store battery health data in EEPROM on the original pack. When you swap cells, the BIOS reads stale data from its own memory and flags the new pack as degraded — even when the cell is fresh. This is a BIOS learn cycle issue, not a fault with the replacement cell. Run the battery from full to hibernate cutoff and back to 100% twice. After two full cycles, the BIOS recalibrates against the new cell's actual capacity and clears the health warning.

Laptop shuts down abruptly at 20–30% remaining

This is a voltage cliff failure. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC can track. When cell voltage falls below the BMS cutoff threshold — typically around 11.1V on a 14.8V Li-ion pack — the system shuts down instantly, even though the OS still shows charge remaining. The fuel gauge is reading average voltage, not instantaneous load voltage. Run the calibration cycle above to resync the gauge, and check that power settings are not forcing maximum CPU performance while on battery.

Compatible Models

VAIO PCG-GRX1P VAIO PCG-R505 VAIO PCG-R505/ABD VAIO PCG-R505/ABW VAIO PCG-R505/ASP VAIO PCG-R505/BW VAIO PCG-R505/SP VAIO PCG-R505AFC VAIO PCG-R505AFT VAIO PCG-R505B/P VAIO PCG-R505CT VAIO PCG-R505D VAIO PCG-R505DF VAIO PCG-R505DFK VAIO PCG-R505DFP VAIO PCG-R505DL VAIO PCG-R505DLK VAIO PCG-R505DLP VAIO PCG-R505DS VAIO PCG-R505DSK VAIO PCG-R505DSP VAIO PCG-R505DT VAIO PCG-R505Dx VAIO PCG-R505E VAIO PCG-R505EC VAIO PCG-R505ECK VAIO PCG-R505ECP VAIO PCG-R505EL VAIO PCG-R505ELK VAIO PCG-R505ELP VAIO PCG-R505ES VAIO PCG-R505ESK VAIO PCG-R505ESP VAIO PCG-R505F VAIO PCG-R505F/BD VAIO PCG-R505F/SP VAIO PCG-R505FR VAIO PCG-R505FR/D VAIO PCG-R505G VAIO PCG-R505GC VAIO PCG-R505GCK VAIO PCG-R505GCP VAIO PCG-R505GK VAIO PCG-R505GL VAIO PCG-R505GLK VAIO PCG-R505GLP VAIO PCG-R505J VAIO PCG-R505J/BD VAIO PCG-R505JE VAIO PCG-R505JEK VAIO PCG-R505JL VAIO PCG-R505JLC VAIO PCG-R505JLK VAIO PCG-R505JS VAIO PCG-R505JSK VAIO PCG-R505JSP VAIO PCG-R505K VAIO PCG-R505M VAIO PCG-R505MF VAIO PCG-R505MP VAIO PCG-R505Q VAIO PCG-R505Q/B VAIO PCG-R505Q/BD VAIO PCG-R505R VAIO PCG-R505R/AK VAIO PCG-R505R/DK VAIO PCG-R505R/GK VAIO PCG-R505R/K VAIO PCG-R505S VAIO PCG-R505S/PD VAIO PCG-R505S/PS VAIO PCG-R505T VAIO PCG-R505TE VAIO PCG-R505TEK VAIO PCG-R505TF VAIO PCG-R505TFP VAIO PCG-R505TL VAIO PCG-R505TLK VAIO PCG-R505TS VAIO PCG-R505TSK VAIO PCG-R505V VAIO PCG-R505V/BD VAIO PCG-R505VF/K VAIO PCG-R505VJ/K VAIO PCG-R505VM/K VAIO PCG-R505VM/P VAIO PCG-R505W VAIO PCG-R505W/P VAIO PCG-R505W/PD VAIO PCG-R505X VAIO PCG-R505X/P VAIO PCG-R505X/PD VAIO PCG-R600HFPD VAIO PCG-R600HMKD VAIO PCG-Z505 VAIO PCG-Z505BP VAIO PCG-Z505BW VAIO PCG-Z505CR VAIO PCG-Z505CT VAIO PCG-Z505D VAIO PCG-Z505DRK VAIO PCG-Z505DT VAIO PCG-Z505DX VAIO PCG-Z505F VAIO PCG-Z505FT VAIO PCG-Z505FX VAIO PCG-Z505G VAIO PCG-Z505GA VAIO PCG-Z505GAH VAIO PCG-Z505GAM VAIO PCG-Z505GR VAIO PCG-Z505HE VAIO PCG-Z505HSK VAIO PCG-Z505HZ VAIO PCG-Z505J VAIO PCG-Z505JE VAIO PCG-Z505JL VAIO PCG-Z505JS VAIO PCG-Z505JX VAIO PCG-Z505K VAIO PCG-Z505LE VAIO PCG-Z505LS VAIO PCG-Z505NR VAIO PCG-Z505P VAIO PCG-Z505R VAIO PCG-Z505RX VAIO PCG-Z505S VAIO PCG-Z505S Pro VAIO PCG-Z505SX VAIO PCG-Z505VR VAIO PCGA-R505 VAIO PCGA-R505AK VAIO PCGA-R505BW VAIO PCGA-R505GK VAIO PCGA-R505K VAIO PCGA-R505R VAIO PCGA-R505SP VAIO PCGA-Z505VR VAIO PCV-P101

Replaces Part Numbers

PCGA-BP2R PCGA-BPZ51 PCGA-BPZ52 PCG-Z505

Technical Specifications

Voltage14.8V
Amp Hours2600mAh
Capacity2600mAh
Rate38.48Wh
Gross Weight140g /4.94 oz
Approximate Weight140g /4.94 oz
Dimension 216.40 x 54.10 x 13.60mm

Product Highlights

  • Brand: Sony
  • Manufacturer: CS
  • Series: Standard
  • Color: Silver
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My VAIO PCG-R505 shows 0% battery and won't recognise the new pack at all — what's happening?

The BIOS is reading EEPROM data that doesn't match the replacement cell's profile, so it reports 0% or flags the battery as unknown. This is normal after any cell swap on Sony VAIO models. Run one full discharge to hibernate cutoff, then charge uninterrupted to 100% — two full cycles clears the mismatch and the BIOS recalibrates to the new cell.

System info shows the wrong Wh rating for this battery — it's reporting a different capacity than 38.48Wh. Is the cell faulty?

No. The Wh value shown in Windows or the BIOS is pulled from EEPROM data, which reflects the rated spec of the original OEM pack, not the physical cell installed. The replacement cell is 38.48Wh. After two full calibration cycles — full discharge to hibernate, then uninterrupted charge to 100% — the fuel gauge IC resets against actual measured capacity and the displayed Wh figure updates to reflect the installed cell.

The fuel gauge jumps around wildly for the first few uses — 60% one minute, 85% the next. Is this a defective cell?

The fuel gauge IC on these VAIO models tracks capacity using historical discharge curves stored from the previous cell. With a fresh replacement, it has no accurate baseline to reference, so readings fluctuate until it builds new data. This is not a cell defect. Run two to three full discharge-to-hibernate and charge-to-100% cycles without interruption — after that, the IC establishes a stable baseline and the gauge readings settle.

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