JIAZIJIA RJ40G 63Wh Laptop Battery for Dell Latitude

JIAZIJIA RJ40G is a 63Wh (15.2V, 3941mAh) plug-and-play Li-ion replacement battery designed to restore reliable runtime to compatible Dell Latitude and Precision 3560 notebooks.

If your Dell Latitude 5420, 5520 or Precision 3560 has a worn-out battery or won't hold charge, this JIAZIJIA RJ40G replacement matches the original form factor and connector types so installation is straightforward. It supports the factory part numbers listed by Dell and comes in a black finish. Before installation, you should confirm the model number printed on your laptop’s original battery to ensure compatibility.

How do I know this battery fits my Dell laptop?

Check the label on your existing battery and compare part numbers and physical shape. This JIAZIJIA RJ40G is built to replace the listed OEM numbers and aligns with the battery bay design of the Latitude 5420, 5520 and Precision 3560 series.

• Matches OEM part numbers: RJ40G, 01K2CF, 075X16 and others.
• Voltage: 15.2V — fits laptops requiring that specification.
• Capacity: 63Wh (3941mAh) for comparable runtime to original.
• Black plug-and-play design that follows original battery shape.

What performance and safety features should I expect?

This replacement is a lithium-ion pack tuned for stable discharge at the stated voltage and capacity. It does not change your laptop’s power management settings, but it restores usable battery life when the original pack has degraded.

• 63Wh rated capacity provides balanced runtime for work and travel.
• Built-in safety circuits to protect against overcharge and short-circuit.
• Engineered to meet the physical and electrical requirements of compatible models.
• Plug-and-play installation — no special tools or drivers required.

How do I install the JIAZIJIA RJ40G safely?

Turn off the laptop and unplug any power source before removing the back cover. Remove the original battery following your laptop manual, then seat the replacement firmly and secure any screws or latches; reinstall the cover and power up to confirm operation.

• Power down and disconnect AC adapter before starting.
• Open the rear case and compare alignment with the existing battery.
• Install and fasten using original screws or latches; avoid forcing connectors.
• First boot: charge to full and allow battery calibration if desired.

What compatibility checks should I perform before buying?

Always open your laptop’s rear case and read the model number on the original battery to confirm a match. Confirm the required voltage (15.2V) and that your system lists one of the known OEM part numbers referenced for interchangeability.

• Verify printed model number on existing battery matches included list.
• Confirm your laptop is a Latitude 5420, 5520 or Precision 3560 series.
• Ensure required voltage is 15.2V to avoid electrical mismatch.
• Consult your service manual for any model-specific installation notes.

Who is this for: The JIAZIJIA RJ40G replacement battery suits business users, students, and field professionals who own a Dell Latitude 5420, 5520 or Precision 3560 and need a cost-effective way to regain portable runtime. It’s intended for users comfortable opening the laptop chassis or for technicians who perform battery replacements; if you’re unsure about compatibility, check the label on your current battery or consult a service specialist before purchase.