Battery pack HP for EliteBook 840 G5, 11.55 V, 4113 mAh, replacement (HSTNN-DB8J)

Replacement battery pack for HP EliteBook 840 G5 with nominal voltage 11.55 V and capacity 4113 mAh. This battery is designed to restore portable power to the laptop and deliver runtime comparable to the original unit. The pack provides compatible electrical characteristics for everyday mobile use and straightforward installation without special tools.

Advantages

The battery pack offers a balance of voltage and capacity suitable for the EliteBook 840 G5, supporting continuous office work and moderate multimedia playback. Its design follows the laptop's power requirements to ensure stable voltage delivery and predictable runtime. The pack is intended as a replacement unit that integrates with standard battery detection and charging circuitry of compatible notebooks.

Suitable for

• Replacing a worn or failing battery in HP EliteBook 840 G5
• Extending usable time for mobile work and travel
• Maintaining laptop operation during presentations or meetings away from mains
• Backup power solution for field work or temporary workstation setups

Key specifications

• Nominal voltage: 11.55 V
• Rated capacity: 4113 mAh
• Chemistry: rechargeable lithium-ion cells
• Form factor: internal laptop battery pack compatible with the EliteBook 840 G5 battery bay
• Typical operating temperature range suitable for standard laptop use

How to use

Power off the laptop and disconnect any external power sources before replacing the battery. Remove the access panel or bottom cover according to the laptop manufacturer's service instructions, release the existing battery connector, and swap the old pack for the replacement unit. Reconnect the battery connector securely and reassemble the laptop. After installation, charge the battery fully before first use to allow the system to calibrate runtime estimates.

Recommendations

To maintain long-term battery performance, avoid exposing the pack to high temperatures, store partially charged if unused for extended periods, and use the laptop's power management settings to reduce deep discharge cycles. Follow HP's safety and disposal guidelines for end-of-life battery handling.