Battery T6 Power for Dell Latitude 3440 3540 — 5200mAh / 58Wh, 6‑cell

Replacement laptop battery T6 Power compatible with a range of Dell notebooks including Latitude 3440 and 3540, several Inspiron 14/15/17 models and Vostro series. The battery uses Li-ion chemistry in a 6‑cell configuration and provides a rated capacity of 5200 mAh (58 Wh) at 11.1 V. Its compact dimensions and standard form factor make it a direct swap for the listed compatible models.

Advantages

The T6 Power 5200 mAh battery delivers a balance of capacity and weight suitable for everyday mobile use. With Li‑ion cells and a 6‑cell layout it offers stable voltage and predictable runtime for compatible Dell laptops. The battery is supplied in a common replacement size that preserves original fit and mounting points.

Suitable for

• Replacing a worn or failing battery in Dell Latitude 3440 and 3540 laptops
• Restoring portable power for Dell Inspiron 14/15/17 series models listed as compatible
• Users who need a direct-fit, 6‑cell Li‑ion replacement with ~5200 mAh capacity

When it may not be suitable

This battery may not be suitable if your laptop model is not among the listed compatible devices or if your machine requires an original OEM part with manufacturer-specific firmware. It is also unsuitable when a higher-capacity or extended battery option is required beyond 5200 mAh.

Key specifications

• Battery type: Lithium‑ion (Li‑ion)
• Configuration: 6 cells
• Rated capacity: 5200 mAh (58 Wh)
• Nominal voltage: 11.1 V
• Color: black
• Dimensions: 273 × 49 × 25 mm
• Weight: 317 g

How to use

Power down the laptop, disconnect any external power, and remove the old battery following the laptop manufacturer’s instructions. Insert the T6 Power replacement ensuring correct alignment with contacts and mounting points, then secure it in place. Reconnect AC power and allow the system to recognise the new battery; perform a full charge cycle before regular use to calibrate charge reporting if recommended by the laptop manufacturer.

What to consider before purchase

• Confirm your laptop model is listed among compatible models (Latitude 3440, 3540; specific Inspiron and Vostro models)
• Check physical dimensions and connector type against your existing battery
• Decide if the 5200 mAh capacity meets your expected runtime needs

Usage recommendations

For best results, use the battery at moderate temperatures, avoid deep discharges when possible, and follow the laptop manufacturer’s guidelines for battery care. If the system firmware prompts for battery calibration after installation, complete the recommended steps.