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Black rectangular lithium-ion laptop battery with label showing model PA5109U 4400mAh 48WH 10.8V

KingSener

KingSener PA5109U laptop battery 4400mAh 48WH 10.8V

SKU CH-VVDT-VNX2R MPN PA5109U

Replacement lithium-ion battery delivering 4400 mAh at 10.8 V for Toshiba Satellite C40, C45, C50, C55, C70, C75, C805, C840, C845, C850, C855, C870 and C875 series

  • ColorBlack
  • TypeBattery
  • Compatibility48WH
  • Battery TypeLithium-Ion
  • Battery Voltage10.8V
  • Battery Capacity4400mAh/48WH
  • 4400 mAh capacity delivers long run-time for daily tasks
  • 48 Wh energy rating supports extended sessions away from power
  • 8 V lithium-ion chemistry matches original voltage requirements
  • Compatible with Toshiba Satellite C40, C45, C50, C55, C70, C75, C805, C840, C845, C850, C855, C870, C875 and Pro models
  • Replaces part numbers PA5109U, PA5109U-1BRS, PA5110U and PABAS272

Replacement battery for Toshiba Satellite series

The KingSener PA5109U is a 10.8V lithium-ion replacement battery rated at 4400mAh and 48WH. It fits a wide range of Toshiba Satellite models including the C40, C45, C50, C55, C70, C75, C805, C840, C845, C850, C855 and C870 families as well as matching Satellite Pro C70, C840, C845, C850, C855 and C870 units. The black pack replaces part numbers PA5109U, PA5109U-1BRS, PA5110U and PABAS272. It is intended for owners of compatible Toshiba laptops who need a fresh power source.

Thermals noise and power draw in daily use

As a passive battery pack the unit generates no audible noise and draws no power while installed. Heat output is limited to normal cell warmth during charge and discharge cycles. The 10.8V lithium-ion chemistry delivers the rated 48WH capacity without active cooling requirements. Users can expect standard battery thermal behaviour for this capacity class.

Bundled items and software impact

The package contains only the replacement battery itself; no tools, cables, adapters or software discs are included. Installation relies on the laptop’s existing battery latch and connector. No driver or firmware updates are required because the pack uses the original voltage and capacity specifications. Buyers who need a screwdriver set or external charger must source those separately.

Highlights

  • 4400 mAh capacity delivers long run-time for daily tasks
  • 48 Wh energy rating supports extended sessions away from power
  • 8 V lithium-ion chemistry matches original voltage requirements
  • Compatible with Toshiba Satellite C40, C45, C50, C55, C70, C75, C805, C840, C845, C850, C855, C870, C875 and Pro models
  • Replaces part numbers PA5109U, PA5109U-1BRS, PA5110U and PABAS272

Specifications

BrandKingsener
ModelPA5109U
Part NumberPA5109U
ColorBlack
TypeBattery
Compatibility48WH
Battery TypeLithium-Ion
Battery Voltage10.8V
Battery Capacity4400mAh/48WH

Questions about this item

How do I install the PA5109U battery in my Toshiba Satellite C55 and which step do people often miss?

Power off the laptop, unplug the AC adapter, slide the release latch to unlock the old pack, remove it, insert the new PA5109U until the latch clicks, then charge fully before first use.

What maintenance or replacement will the PA5109U 4400mAh lithium-ion battery need later?

Expect gradual capacity loss after several hundred charge cycles; replace the pack when run-time no longer meets your needs.

What limit appears first on the PA5109U during sustained heavy use?

The 48WH capacity sets the runtime ceiling; under continuous load the pack will deplete before any thermal throttle engages.

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