It depends on the exact PCG sub-model, since this line uses many different packs rather than one standard. Early models use the PCGA-BP prefix (for example PCGA-BP2NX or PCGA-BP4V), while later PCG machines moved to VGP-BPS and VGP-BPL part numbers. Most are 11.1V or 14.8V lithium-ion with capacities from about 2000mAh to over 5000mAh. Replacement prices run from $64.99 to $80.99. Check the part number printed on your current battery to confirm the correct match.

Start with your full model number, not just the family. “PCG-505” alone is not enough; you need the complete sub-model such as PCG-505GX, usually printed on the bezel under the screen or on the bottom label. Then check the part number on your current battery, which begins with PCGA-BP on early models or VGP-BPS on later ones. Finally, verify the connector position and battery footprint against the product image, since voltage on these packs is typically 11.1V or 14.8V and shapes vary widely.

PCG replacement batteries range from $64.99 to $80.99. Where a specific model lands in that range depends on the sub-series, the cell count, and the capacity of the pack, since extended packs hold more than standard ones. To make sure you are pricing the right part, match your full model number (such as PCG-505GX) and the part number printed on your current battery, which will start with either PCGA-BP or VGP-BPS depending on the year.

No, PCG batteries are generally not interchangeable across sub-series. Sony changed battery shapes, connectors, and capacities rapidly throughout this line, so a pack for a PCG-505 PictureBook will not fit a PCG-FX or PCG-Z1. Even within one family, voltage can differ between 11.1V and 14.8V designs. Always match your full model number and the part number on your existing battery (for example PCGA-BP4V) rather than assuming one PCG pack works in another.

Shape, capacity, voltage, and how the pack mounts all differ by sub-series. The PCG-505 and PCG-C1 PictureBook models use proprietary, sometimes cylinder-style packs, while the PCG-FX and PCG-F use rectangular batteries that click into the rear or bottom. The thin-and-light PCG-SRX, PCG-GRS, and PCG-TR use flush-fitting rectangular packs, and late-era PCG-Z1 and PCG-V505 models use advanced lithium-ion packs such as the PCGA-BP4V. Part numbers reflect this, moving from PCGA-BP to VGP-BPS over time.

Look at the label printed on your current battery. Early PCG packs show a part number starting with PCGA-BP (such as PCGA-BP3T or PCGA-BP4V), while later models show VGP-BPS or VGP-BPL. You will usually need to remove the pack to read the full label. Also note your laptop’s full model number from the bezel under the screen or the bottom case (for example PCG-505GX), since both the model and the part number help confirm the correct match.

Yes, in most cases. The PCG-FX and PCG-F packs click into the rear or bottom and slide out without tools, while thin-and-light models like the PCG-SRX and PCG-GRS use flush-mounted packs that release from the base. The main task is matching correctly: confirm your full model number, verify the part number (PCGA-BP or VGP-BPS), and check the connector position and footprint against the product image, since these older designs vary considerably across the line.

Watch for four main signs. First, a big runtime drop, like a PCG that once ran 3 hours now lasting 30 minutes. Second, unexpected shutdowns even when the meter shows charge remaining. Third, the laptop runs only when plugged into AC and dies instantly when unplugged. Fourth, a Windows battery warning such as “consider replacing your battery.” Since most PCG models date from 1997 to 2005, their lithium-ion packs are well past typical lifespan. Replacements run $64.99 to $80.99, so matching your exact part number first is worth the few minutes it takes.