Battery Pack Dell Inspiron 17 7779 15.2V 3500mAh Li-ion laptop battery

Replacement battery pack for Dell Inspiron 17 7779 with a nominal voltage of 15.2V and capacity of 3500mAh. This Li‑ion laptop battery is designed to match the original battery's form factor and connector layout to enable straightforward installation and consistent performance for mobile use. It supplies power for typical day‑to‑day computing tasks and is intended as a like‑for‑like replacement for the original unit.

Advantages

The lithium‑ion chemistry ensures a consistent discharge profile and reasonable cycle life for regular use. The battery's nominal 15.2V output and 3500mAh capacity provide a balance between runtime and weight suitable for a 17‑inch convertible laptop. Compatibility with the Inspiron 17 7779 form factor reduces the need for adjustments during installation and helps maintain fit and cooling characteristics designed by the manufacturer.

Suitable for

• Replacing a worn or failing battery in Dell Inspiron 17 7779 laptops
• Extending mobile runtime for office work, web browsing and video playback
• Maintaining on‑site productivity where mains power is not continuously available
• Users who require a battery with the original physical fit and connector compatibility

Key specifications

• Chemistry: Lithium‑ion (Li‑ion)
• Nominal voltage: 15.2 V
• Capacity: 3500 mAh
• Intended device type: 17‑inch convertible laptop (Dell Inspiron 17 7779)
• Physical characteristics: designed to match original form factor and connector layout

How to use

Power down the laptop and disconnect it from the mains before replacing the battery. Remove the service panel or bottom cover according to the laptop manufacturer's instructions, taking care with screws and retention clips. Disconnect the old battery connector from the motherboard, remove the old battery, and install the replacement by aligning the connector and securing the pack in the same orientation. Reassemble the laptop, connect the charger, and allow the battery to charge fully before first use to ensure battery management systems report accurate state of charge.

Recommendations

For safe operation, use the battery only in compatible Dell Inspiron 17 7779 models and follow standard battery care: avoid extreme temperatures, avoid long‑term storage at full charge, and perform occasional full charge/discharge cycles to help maintain the battery management calibration. Dispose of depleted batteries in accordance with local regulations for electronic waste and batteries.