Dell Latitude Laptop Green Cell 4400mAh Battery (Li-Ion 11.1V / 10.8V) - Ref. T54FJ / 8858X (Refurbished)

Description

The Green Cell external replacement battery of 4400 mAh (references T54FJ / 8858X / M5Y0X) is a refurbished spare part specially selected for the maintenance, renovation and refurbishment of a vast fleet of Dell Latitude professional laptops (E5420, E5430, E5520, E5530, E6420, E6430, E6520, E6530) as well as certain Dell Inspiron and Vostro models of equivalent generation. Intended for computer repair workshops, network maintenance technicians and B2B resellers specialised in refurbished hardware, this battery under a 3-month warranty allows restoring the original autonomy of Dell mobile workstations at a perfectly controlled workshop equipment cost.

Electochemically, this refurbished module uses an assembly of 6 high-density Lithium-ion (Li-Ion) cells of the Green Cell brand, delivering a capacity of 4400 mAh at a nominal voltage of 11.1V (10.8V compatible) for an accumulated energy of 48 Wh. This configuration guarantees a perfectly stable voltage output on the motherboard and supports up to 500 complete charge and discharge cycles. The component embeds an intelligent electronic management card (BMS - Battery Management System) responsible for the continuous regulation of the charging current. This controller ensures active protection against overvoltages, deep discharges, short circuits as well as the risks of thermal runaway during intensive use.

The rigid external casing is injected into a high-density ABS insulating polymer resistant to workshop thermal and mechanical constraints. Designed to fit under the external power bay of compatible Dell Latitude laptops, this module clips directly into place without needing to dismantle the device. The guide rails and mechanical latches faithfully respect the original manufacturer specifications to ensure a firm hold without mechanical play under the computer.

Technical specifications

• Manufacturer reference: T54FJ / 8858X / M5Y0X (Green Cell equivalents DE04 / 08858X, 0M5Y0X, 312-1163, 312-1242, 451-11694, NHXP6, PRRRF)
• Technology / Material: Lithium-ion (Li-Ion) accumulators, rigid ABS polymer casing
• Compatibility: Dell Latitude E5420, E5430, E5520, E5530, E6420, E6430, E6520, E6530, Dell Inspiron N5420, N5520, N5720, Dell Vostro 3460, 3560
• Dimensions: 214 x 53 x 20 mm
• Weight: 310 g
• Power supply / Standards: Nominal voltage 11.1V (10.8V compatible) / Capacity 4400 mAh (48 Wh) / CE, RoHS certifications
• Number of cells: 6 Li-Ion cells
• Condition / Warranty: Refurbished (Refurb) / 3-month B2B warranty
• Integrated protections: BMS board with anti-overload, anti-overheating, short-circuit and deep-discharge safety

Workshop Advice & Usage

Before validating the order for a professional customer, check the exact generation of the Dell Latitude: the T54FJ reference is compatible with the E6420 / E6430 and E5420 / E5430 series. It is not compatible with the 4th generation (Latitude E6440 or E6540) nor with the 1st generation (E6410). Installation is carried out with the power off, mains adapter unplugged, by sliding the module into its bay until the locking latches click. During the first deployment in the workshop, the Workshop advises performing an initial calibration cycle: charge the refurbished battery to 100% under mains voltage, then let the computer discharge gradually to around 10-15% before carrying out a full recharge without interruption.