HP EliteBook CS03XL Replacement Laptop Battery – 840 G3 / 840 G4

# HP CS03XL Replacement Battery for HP EliteBook 840 G3 and 840 G4

### Give Your HP EliteBook a New Battery Life

Is your HP EliteBook battery draining too quickly, refusing to charge properly, or shutting down without warning?

The HP CS03XL replacement laptop battery offers a practical replacement solution for compatible HP EliteBook 840 G3 and 840 G4 laptops.

Designed for internal installation, this rechargeable lithium-ion battery can help restore portable operation when your original battery has become weak or defective.

### Reliable Rechargeable Battery Technology

The CS03XL is a rechargeable lithium-ion laptop battery designed to provide portable power to compatible devices.

Replacement versions are commonly rated at 11.4V and approximately 46Wh to 46.5Wh, depending on the manufacturer.

Actual battery runtime depends on laptop settings, screen brightness, processor workload, battery quality, and charging condition.

### Compatible HP Laptop Models

The CS03XL battery family is commonly listed for:

- HP EliteBook 840 G3
- HP EliteBook 840 G4
- HP EliteBook 848 G3 and G4
- HP EliteBook 850 G3 and G4
- HP EliteBook 745 G3 and G4
- HP EliteBook 755 G3 and G4
- Selected HP ZBook 15u G3 and G4 models

Compatibility must be confirmed using the original battery part number and physical connection.

### Replacement Battery Part Numbers

The commonly associated replacement references include:

CS03XL, CS03, CS03046XL, HSTNN-IB6Y, HSTNN-UB6S, 800231-141, 800231-271, 800231-1C1, and 800513-001.

These are compatibility references, not proof that every replacement battery is an original HP-manufactured product.

### When Should You Replace Your Laptop Battery?

A battery replacement may be appropriate if:

- The battery percentage drops unusually quickly.
- The laptop no longer provides enough battery backup.
- The laptop shuts down unexpectedly when disconnected from its charger.
- The battery is no longer detected or fails diagnostic testing.
- The battery has become weak after prolonged use.

A faulty charger or charging circuit can cause similar symptoms, so proper diagnosis is recommended.

### Practical Benefits

- Helps restore portable laptop operation
- Suitable for compatible EliteBook battery replacement
- Rechargeable lithium battery technology
- Internal battery installation
- Useful for extending the service life of an otherwise functional laptop
- Convenient for students, office professionals, business owners, and everyday laptop users

### Technical Specifications

| Feature | Specification |
|---|---|
| Product | Replacement Laptop Battery |
| Battery Model | CS03XL |
| Compatible Brand | HP |
| Main Laptop Models | EliteBook 840 G3 / 840 G4 |
| Battery Chemistry | Lithium-Ion |
| Voltage | 11.4V on documented versions; verify stock |
| Energy | Approximately 46–46.5Wh |
| Colour | Black |
| Rechargeable | Yes |
| Installation | Internal |
| Part Numbers | CS03XL, HSTNN-IB6Y, HSTNN-UB6S |
| HP Spare Reference | 800513-001 |
| Condition | New, if supplied as advertised |
| Warranty | According to your actual store policy |
| Package | One compatible replacement battery |

### Installation and Safety

Switch off the laptop and disconnect its charger before installing the battery.

Check the original battery label, connector position, voltage, and mounting points before replacement.

Installation should be carried out by a qualified technician where necessary. Never bend, puncture, crush, or install a swollen lithium battery.

Old lithium batteries should be disposed of through an appropriate battery recycling service.

### Why Choose the CS03XL Replacement Battery?

A properly matched CS03XL replacement battery can help keep your HP EliteBook 840 G3 or G4 useful without replacing the entire laptop.

Whether your device is used for office work, educational activities, business management, or everyday personal tasks, a compatible battery replacement can restore the convenience of portable computing.

**HP EliteBook CS03XL Replacement Battery – Portable Power for Compatible HP EliteBook 840 G3 and G4 Laptops.**