Rechargeable laptop battery Dell J31N7 — 45 Wh, 4‑cell, compatible replacement

Dell J31N7 is a rechargeable 4-cell laptop battery with a rated capacity of 45 Wh designed as a compatible replacement for certain Dell notebook models. It provides portable power for browsing, office applications and light multimedia use, delivering a compact and lightweight power source intended for straightforward user replacement and continued mobility.

Advantages

The battery offers a balance of capacity and portability in a slim, 4-cell format that fits the original Dell mounting points and connectors for easy installation. With a rated energy of 45 Wh it restores working time for everyday tasks and reduces dependence on mains power while remaining lightweight for mobile use. The design supports standard charging and power-management behaviors of Dell notebooks and is manufactured to meet typical quality and safety expectations for rechargeable laptop batteries.

Suitable for

• Replacing a depleted battery in compatible Dell laptops
• Extending operating time for office work and web browsing
• Light multimedia playback and video calls on the go
• Travel and remote work where compact, low-weight power is required

Key specifications

• Cell count: 4-cell configuration
• Nominal energy: 45 Wh
• Chemistry: Lithium-ion rechargeable cells
• Form factor: Slim, OEM-compatible replacement shape
• Compatibility: Designed for use in compatible Dell notebook models (user to verify model fitment)

How to use

Power down the laptop, disconnect the AC adapter and follow the laptop manufacturer’s instructions to remove the original battery. Align the replacement battery with the battery bay and connector, press into place until it seats securely, and fasten any latches or screws as required. Reconnect the AC adapter and allow the battery to charge fully before first use to ensure proper calibration with the notebook’s power-management system.

Recommendations

For safe and reliable operation, use the battery in environments within the manufacturer’s recommended temperature range, avoid exposing it to liquids or extreme heat, and charge it using the laptop’s original adapter and charging circuitry. Do not disassemble or puncture the battery pack; recycle or dispose of the battery according to local electronic-waste regulations.