Battery Green Cell LE78 for Lenovo ThinkPad T420s T420si T430s, LiPo 3600 mAh, black

Replacement laptop battery Green Cell LE78 compatible with Lenovo ThinkPad T420s, T420si and T430s. This LiPo (Lithium Polymer) battery delivers 3600 mAh capacity in a black housing and is designed to restore portable power for everyday tasks such as office work, travel and meetings. The battery fits the original battery compartment and works with standard Lenovo charging systems to provide reliable runtime and safe charging behavior.

Advantages

The Green Cell LE78 uses Lithium Polymer technology to offer a balance of energy density and compact form factor, enabling extended runtime without adding excessive weight. Its 3600 mAh capacity provides consistent power for prolonged use. The battery is finished in a black housing that matches the laptop’s aesthetic and is manufactured to meet common safety and performance expectations for replacement laptop batteries. Installation is straightforward, enabling quick swap-in replacement for the original unit.

Suitable for (tasks / use cases)

Key specifications

How to use

Power down the laptop and disconnect the mains adapter. Remove the original battery according to the laptop manufacturer’s instructions, then align and insert the Green Cell LE78 into the battery bay until it locks into place. Reconnect the mains adapter and charge the battery fully before the first use to ensure proper calibration. After installation, manage power settings in the operating system to optimise runtime as required.

Recommendations

For safe and long-lasting operation, use the laptop with the manufacturer-recommended charger, avoid extreme temperatures, and store the battery partially charged if not used for extended periods. Regular full-charge/discharge cycles are not necessary for LiPo chemistry; occasional calibration (full charge then discharge to ~20%) helps the battery meter remain accurate.