New RJ40G Laptop Battery for Dell Latitude 5420 5520 Precision 3560 63Wh 15.2V

⚡ **Brand New Part — Ready to Use** ⚡

💻 **GUARANTEED TO FIT THE FOLLOWING LAPTOP MODELS:**
* **Dell Latitude Series:** 14" 5420, 15" 5520
* **Dell Precision Workstations:** 15" 3560
* **Dell Regulatory Chassis Configurations:** P137G, P137G001, P104F, P104F001, P104F002

⚠️ **CRITICAL COMPATIBILITY NOTE FOR BUYERS:**
Please ensure compatibility before purchase. This is the extended run **15.2V High-Capacity 63Wh (RJ40G)** pack featuring the strict **4ICP6/57/77** factory cell profile configuration. 

* It is a direct fit upgrades for laptops originally using the lower capacity 42Wh (Type WY9DX) battery.
* Please double-check your original battery part number before purchase. If you are unsure about fitment, feel free to message us before buying and we will gladly help you verify!

🛠️ **Workshop Reliability:**
As used in our own workshop, these parts are fully tested, built with high-quality cells, and guaranteed to fit your machine perfectly.

🚚 **Shipping & Dispatch:**
* **Fast dispatch from the UK immediately.**
* **Free shipping included** (unless otherwise listed).

📦 **Condition & Package Contents:**
* **Condition:** Brand New.
* **Included:** Item as shown in photos only (no additional accessories, brackets, or screws included unless explicitly stated).

⚙️ **Product Specifications:**
* **Battery Type:** Rechargeable Li-ion / Li-polymer
* **Capacity:** 63Wh / 3941mAh / 4-Cell
* **Voltage:** 15.2V
* **IEC Cell Designation:** 4ICP6/57/77
* **Condition:** Brand New

🔍 **Direct Cross-Reference Part Numbers:**
* RJ40G / 0RJ40G
* 4ICP6/57/77
* M033W / 0M033W
* 1K2CF / 01K2CF
* 75X16 / 075X16
* WY9DX / 0WK3F1 / 0M3KCN / 005R42 / 6RNMX

🔧 **Workshop Installation Tip:** 
If your laptop does not power on immediately after installation, it is likely due to residual "flea power" in the motherboard circuits. Simply disconnect the new battery, hold down the laptop's physical power button for 20 seconds to drain the residual current, and then reconnect the battery loop.

💬 **Our Commitment to You:**
Any problems — please don't hesitate to contact us. We will respond immediately. Your absolute satisfaction will always be our priority!