Laptop battery MITSU for Dell Latitude E5420 / E6420 4400 mAh 10.8–11.1V

Replacement laptop battery MITSU for Dell Latitude E5420 / E6420 with nominal capacity of 4400 mAh and rated voltage 10.8–11.1 V. This battery is designed as a direct alternative to the original pack to restore portable power for everyday mobile use, office work and travel. It supports standard charging behaviour of Dell notebooks in the specified series and provides runtime suitable for typical productivity tasks.

Advantages

The MITSU battery delivers a specified capacity of 4400 mAh and a rated voltage range of 10.8–11.1 V to match the electrical requirements of compatible Dell Latitude models. It is manufactured to fit the original battery compartment and electrical contacts for a straightforward swap without modifications. The battery supports the laptop's standard charge/discharge cycles and provides stable output under normal operating conditions.

Key specifications

How to use

Turn off the laptop and unplug the power adapter before replacing the battery. Slide the battery release latches, remove the existing pack from the battery bay and align the MITSU replacement with the contacts and mounting slots. Press the battery into place until it locks and verify the latch is engaged. Reconnect the power adapter and power on the laptop; allow the system to detect the new battery and complete an initial charge cycle to calibrate reported capacity.

Recommendations

For best results, follow standard battery care: avoid deep discharges where possible, keep the laptop and battery within the manufacturer’s recommended temperature range, and perform regular charge cycles. Use the original or Dell-approved power adapter for charging. If the laptop shows charging errors or the battery is not recognized, remove and reseat the pack and check the contacts for dirt or oxidation before contacting technical support.

Keywords: Laptop battery MITSU, Dell Latitude E5420 battery, Dell Latitude E6420 battery, 4400 mAh laptop battery, 10.8V battery replacement, Li-ion replacement pack.