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Rectangular black lithium-ion laptop battery with six cells and label showing 11.1V 4400mAh 48Wh

FOCUSTEC

FOCUSTEC L09S6Y02 11.1V 4400mAh 48Wh laptop battery

SKU CH-TJ9Y-DAM7Q

Replacement lithium-ion battery rated at 11.1V, 4400mAh and 48Wh for compatible Lenovo laptops

  • Battery TypeLithium-Ion
  • Restores laptop runtime with 48Wh lithium-ion capacity
  • Six-cell design rated at 11.1V and 4400mAh for accurate OEM specification
  • Built-in short-circuit, overheat and overload protection for safe operation
  • Compatible with Lenovo V570 G560 B570 IdeaPad Z470 Z560 Z565 Z570 Z575
  • Replaces original part numbers including 57Y6454 L09M6Y02 L09L6Y02 L09C6Y02 L10P6Y22

11.1 V 4400 mAh 48 Wh replacement battery

This 6-cell lithium-ion battery is built to match the original 11.1 V 4400 mAh 48 Wh specification for compatible Lenovo laptops. It is intended for owners of listed IdeaPad and V-series models who need to restore the original runtime of a worn-out pack.

Check your part number before ordering

Verify that the original battery carries one of the listed part numbers such as 57Y6454, L09S6Y02 or L10C6Y02 and that the laptop model appears in the compatibility list including V570, G560, B570, Z470, Z560, Z565, Z570 or Z575. Buyers whose machines use a different voltage, capacity or form factor will not be able to install this pack.

Steady output with protection circuits

The pack delivers a stable 11.1 V through integrated short-circuit, overheat and overload safeguards that remain active during extended use. These protections help maintain consistent performance over long sessions rather than only in brief bursts.

Highlights

  • Restores laptop runtime with 48Wh lithium-ion capacity
  • Six-cell design rated at 11.1V and 4400mAh for accurate OEM specification
  • Built-in short-circuit, overheat and overload protection for safe operation
  • Compatible with Lenovo V570 G560 B570 IdeaPad Z470 Z560 Z565 Z570 Z575
  • Replaces original part numbers including 57Y6454 L09M6Y02 L09L6Y02 L09C6Y02 L10P6Y22

Specifications

Battery TypeLithium-Ion

Questions about this item

Does the FOCUSTEC L09S6Y02 battery include installation tools or must they be purchased separately?

The battery ships as a standalone 6-cell lithium-ion unit rated at 11.1 V, 4400 mAh and 48 Wh; no screws, spudgers or adhesive strips are included, so any tools needed for the swap must be sourced separately.

How do I decide between the 4400 mAh and higher-capacity versions for my Lenovo V570 or IdeaPad Z570?

This model is offered only in the single 4400 mAh / 48 Wh configuration; there is no higher-capacity variant listed for the compatible Lenovo V570, G560, B570, IdeaPad Z470, Z560, Z565, Z570 or Z575 series.

What does the 48 Wh rating mean for real-world runtime on a Lenovo B570?

The 48 Wh rating matches the original equipment specification, so expected runtime per charge should be comparable to the factory battery when the laptop is used under similar workloads and power settings.

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