Land Rover LR4 H7 to H8 Battery Upgrade

I recently replaced my battery after receiving a few low battery warnings and decided to upgrade to an H8 from the factory H7 size. Overall this is a simple battery swap, but I wanted to include the steps to update the Car Configuration File (CCF) and reset the Battery Management System (BMS), along with resetting the power windows and sunroof.

Batteries

• (old) CarQuest Gold 94RH7 CCA 800 CA 1000 RC 140 (LxWxH) 12.5" x 6.8" x 7.4"
• (new) Bosch Premium 49-850BAGM CCA 900 CA 1080 RC 185 (LxWxH) 14" x 6.87" x 7.43"

Tools

• Ratchet (1/4 or 3/8)
• Ratchet Extension
• 8mm Socket (battery clamp bolts)
• 10mm Socket (battery terminal nuts)
• (optional) IIDTool

Torque

• Battery clamp 5Nm (4 lb.ft)
• Battery terminals 5Nm (4 lb.ft)

Steps

1. (Optional) Fully charge the new battery, mine took around 24hrs with a 12V 1.25A charger

2. Remove battery cover and battery clamp

3. Disconnect battery vent

4. Disconnect battery terminals and remove battery

5. Install new battery, reconnect vent, terminals and clamp

6. (optional) Update the battery type in the CCF using IIDTool

    Car Config >  BCM-Body Control > Battery Type (H8HD 90Ah 950 cold cranking ampere)

7. (optional) Reset the BMS

    Service/Test > BCM-Body Control > Battery Replacement

8. (optional) Reset automatic power windows (auto up) and sunroof, I also had to reset the date, time, and temperature settings (C/F).