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Rectangular black lithium-polymer laptop battery, 11.4V 46.5Wh

POWER-FENG

POWER-FENG CS03XL 46.5Wh 11.4V laptop battery

SKU CH-NZ65-FEHXR

A 46.5Wh 11.4V lithium-polymer replacement battery compatible with HP EliteBook 745, 755, 840, 850 and ZBook 15u models

  • TypeBattery
  • Battery TypeLaptop Batteries
  • 5Wh capacity powers extended work sessions
  • 4V Li-polymer chemistry delivers stable voltage output
  • 3910mAh rating supports reliable daily productivity
  • Replaces CS03XL and eight other HP part numbers
  • Compatible with EliteBook 745 755 840 850 G3 G4 and ZBook 15u G3 G4

What this battery replaces

The POWER-FENG CS03XL is a new 46.5Wh 11.4V lithium-polymer pack built to replace HP part numbers CS03XL, HSTNN-IB6Y, HSTNN-UB6S, 800231-141, 800513-001, HSTNN-I33C-4, HSTNN-I33C-5, HSTNN-I41C-4 and HSTNN-I41C-5. It fits EliteBook 745 G3, 745 G4, 755 G3, 755 G4, 840 G2, 840 G3, 840 G4, 850 G3, 850 G4 and ZBook 15u G3, 15u G4.

The spec that decides fit

Voltage and capacity must match the original exactly; this unit delivers 11.4V and 46.5Wh (3910mAh) so it slots into the listed EliteBook and ZBook models without adapter changes. Buyers whose laptops use a different voltage or a higher capacity pack cannot use this battery.

Behaviour under sustained load

Li-polymer chemistry holds voltage steadily during long work sessions, so the pack delivers consistent run-time across a full discharge rather than dropping off after a short burst. The black casing matches the original aesthetic and the cell layout fits the existing bay without modification.

Highlights

  • 5Wh capacity powers extended work sessions
  • 4V Li-polymer chemistry delivers stable voltage output
  • 3910mAh rating supports reliable daily productivity
  • Replaces CS03XL and eight other HP part numbers
  • Compatible with EliteBook 745 755 840 850 G3 G4 and ZBook 15u G3 G4

Specifications

TypeBattery
Battery TypeLaptop Batteries

Questions about this item

How long will the 46.5Wh rating actually run my EliteBook 840 G3?

The 46.5Wh capacity delivers the same energy as the original CS03XL pack; real-world runtime matches the factory battery when new.

What connector standard does the 11.4V pack use and will it limit charging speed?

It uses the proprietary HP CS03XL connector; the notebook’s own charge controller sets the current limit, not the battery.

Will this black Li-polymer unit fit inside my ZBook 15u G4 without modification?

Yes, it is a direct mechanical replacement for part numbers CS03XL, HSTNN-IB6Y and HSTNN-UB6S in the listed models.

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