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Rectangular black lithium-ion laptop battery with label showing 48Wh 11.4V 4-cell

FOCUSTEC

FOCUSTEC CS03XL 48Wh 11.4V 4-cell laptop battery

SKU CH-1PM7-5M7HP

48Wh 11.4V 4-cell lithium-ion replacement battery for HP EliteBook 745, 755, 840, 850 G3–G4 and ZBook 15u G3–G4, with overcharge, overdischarge.

  • Battery TypeLithium-Ion
  • 48Wh capacity powers compatible EliteBook and ZBook models for extended work sessions
  • 4-cell lithium-ion design at 11.4V matches original HP specifications for reliable performance
  • Built-in overcharge, overdischarge, over-temperature and short-circuit protection safeguards the battery and laptop
  • Up to 500 recharge cycles deliver long-term usable life across daily charge routines
  • Direct replacement for HP part numbers including CS03XL, T7B32AA, HSTNN-UB6S and 800513-001

Compatible HP EliteBook and ZBook replacement

This 48Wh lithium-ion battery fits HP EliteBook 745 G3 G4 755 G3 G4 840 G3 G4 850 G3 G4 and ZBook 15u G3 G4 mobile workstations. It matches part numbers including CS03XL T7B32AA 800231-141 800513-001 HSTNN-UB6S and HSTNN-IB6Y. The pack is 100% new and built to original specifications for a direct swap.

48Wh capacity and 500-cycle rating

At 11.4V with four cells the pack delivers 48Wh which supports typical office workloads through a standard workday. Protection circuits guard against overcharge overdischarge overheating and short circuits. The supplier rates the battery for up to 500 recharge cycles before capacity drops below useful levels.

Upgrades from worn original cells

Replacing a depleted factory battery restores full runtime and removes the need to stay tethered to an AC adapter. The jump is worth it when the original pack no longer holds charge or triggers sudden shutdowns. It does not add extra capacity beyond the original 48Wh design so users needing longer unplugged time will need a higher-capacity alternative if one exists for their chassis.

Highlights

  • 48Wh capacity powers compatible EliteBook and ZBook models for extended work sessions
  • 4-cell lithium-ion design at 11.4V matches original HP specifications for reliable performance
  • Built-in overcharge, overdischarge, over-temperature and short-circuit protection safeguards the battery and laptop
  • Up to 500 recharge cycles deliver long-term usable life across daily charge routines
  • Direct replacement for HP part numbers including CS03XL, T7B32AA, HSTNN-UB6S and 800513-001

Specifications

Battery TypeLithium-Ion

Questions about this item

Will the CS03XL battery fit my EliteBook 840 G3 alongside the original AC adapter?

Yes, the CS03XL matches the 11.4V 48Wh specification and part numbers such as 800231-141, so it works with the existing charger and power circuitry of the EliteBook 840 G3.

How can I verify the battery is operating correctly after installation?

The system should report 11.4V and 48Wh in the BIOS or OS power meter, charge to 100% without error, and sustain runtime consistent with a 4-cell Li-ion pack rated for up to 500 cycles.

Does the package include only the battery or are screws and tools also supplied?

The box contains the CS03XL 4-cell battery itself; mounting screws and any service tools must be sourced separately.

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