bossfulton RJ40G 63Wh Replacement Battery for Dell Latitude

The bossfulton RJ40G 63Wh 4-cell replacement battery restores full mobile runtime for compatible Dell Latitude 14/15 and Precision 15 notebooks.

If your Dell Latitude 14 5420, Latitude 15 5520, or Precision 15 3560 is running out of working hours or shows erratic battery behavior, this bossfulton RJ40G replacement returns reliable power. Built with high-quality lithium-ion cells and a 15.2V 3941mAh (63Wh) rating, the pack is designed to match OEM fit and function while providing more than 500 charge cycles under normal use. The package includes tools and a manual to make swapping the battery straightforward, and bossfulton backs the product with a 12-month replacement warranty and responsive customer support.

How do I know this battery fits my Dell laptop?

This RJ40G pack is tailored to the exact mounting points, connector, and voltage used by several Dell models, reducing fitment issues. Check the Dell model and part number on your original battery to confirm compatibility before ordering.

• Compatible models: Latitude 14 5420, Latitude 15 5520, Precision 15 3560.
• Also fits batteries labeled RJ40G, 01K2CF, 075X16, WY9DX, 0WK3F1, 0M3KCN, 005R42.
• Voltage and capacity match: 15.2V and 63Wh (3941mAh).

What performance and life can I expect from the bossfulton RJ40G battery?

The pack uses premium lithium-ion cells in a 4-cell configuration for stable output and everyday endurance. Under normal usage it is engineered to deliver consistent runtime for typical productivity tasks and withstand more than 500 recharge cycles.

• Rated capacity: 63Wh / 3941mAh at 15.2V for balanced power and portability.
• Designed for cycle life exceeding 500 charges with proper care.
• Certified to UL, CE, FCC and RoHS standards for safety and compliance.

Is installing this battery difficult and what comes in the box?

Installation is straightforward for users comfortable opening the laptop’s service panel; bossfulton supplies a professional screwdriver set and a step-by-step manual to simplify the swap. If you prefer, a technician can install it quickly — the replacement is mechanically and electronically compatible with the listed Dell models.

• Included: 1× RJ40G replacement battery, 1× screwdriver set, 1× instruction manual.
• Installation: remove old battery, align connector, secure new pack, then reboot to verify charge status.
• Support: responsive customer service with 24-hour response and a 12-month replacement warranty.

How safe and reliable is this aftermarket battery?

bossfulton emphasizes safety through component selection, quality control, and third-party certifications to reduce risks related to overheating or premature failure. The battery is manufactured and tested to meet recognized safety and environmental requirements.

• Multiple safety certifications: UL, CE, FCC, RoHS.
• Quality control: compatibility testing and production inspections before shipping.
• Returns and warranty: 30-day return policy and 12-month replacement warranty for peace of mind.

Who is this for: The bossfulton 63Wh RJ40G battery is ideal for Dell owners who need a dependable OEM-style replacement without the OEM price — especially business users, students, and technicians who require predictable runtime and safe operation. It’s also a good fit for anyone who wants a complete swap kit (battery plus tools) and a seller-backed warranty to simplify repairs and extend the useful life of a Latitude 14 5420, Latitude 15 5520, or Precision 15 3560 notebook.