Battery HP L11421-2D3 HIGHPOWER515974 3.72Ah rechargeable lithium-ion battery for portable devices

The HP L11421-2D3 HIGHPOWER515974 is a rechargeable lithium-ion battery with a nominal capacity of 3.72 Ah designed for use in compatible portable devices. Intended as a replacement or spare power source, this battery provides extended runtime and consistent voltage output to support device operation during travel, field work, or everyday use. The battery is intended to be installed according to the device manufacturer’s instructions and to be handled following standard safety practices for lithium-ion cells.

Advantages

This rechargeable lithium-ion battery offers high energy density in a compact form factor, enabling longer operating time without significant increase in weight. It provides stable power delivery under typical load conditions and supports repeated charge–discharge cycles when charged and stored correctly. The battery is compatible with devices that accept the same physical and electrical specifications, allowing straightforward replacement or use as a backup power source.

Suitable for

• Replacement battery for compatible portable devices that accept the same form factor and electrical characteristics
• Extended field work where prolonged device runtime is required
• Travel and mobile use as a spare power source
• Home or office backup for uninterrupted device operation

Key specifications

• Cell type: rechargeable lithium‑ion
• Nominal capacity: 3.72 Ah
• Intended use: portable devices requiring compatible voltage and size
• Form factor: compact battery pack compatible with designated device holders and connectors
• Typical operating conditions: ambient temperatures and charge rates recommended by device manufacturer

How to use

Before installation, ensure the device is powered off and disconnected from any external power sources. Remove the old battery following the device manufacturer’s removal instructions, then insert the replacement battery, ensuring correct orientation and secure connection with the device’s contacts. Charge the battery with a charger approved or recommended by the device manufacturer and observe charging indicators. Follow the device guidelines for initial conditioning, charging cycles, and storage to maintain performance and longevity.

Usage recommendations

Store the battery in a cool, dry place and avoid exposure to extreme temperatures, moisture, or direct sunlight. Use chargers and accessories that match the device’s specifications. Dispose of or recycle the battery according to local regulations for lithium‑ion cells.