MG HS: Upgrading to Houny LiFePO4 Battery LN2
Why Upgrade the MG HS to LiFePO4?
The MG HS 1.5T comes factory-equipped with a standard LN2 lead-acid battery. As the battery ages, internal resistance increases, which can lead to sluggish starts and unstable voltage for the vehicle’s sensitive electronics.
By switching to a Houny LN2 85Ah LiFePO4 battery, you gain:
- Stable Voltage: Improved ignition efficiency and smoother transmission shifts.
- Weight Reduction: Nearly 10-15kg lighter than lead-acid, reducing front-end “understeer” feel.
- Longevity: A lifespan of 5-10 years compared to the typical 2-3 years of lead-acid.
DIY Memory-Saving Installation Guide
This guide details the “Memory-Saving” method using an OBD-II Memory Saver to ensure no error codes or lost settings after the swap.
| Step | Action | Key Details & Precautions |
|---|---|---|
| 1 | Connect Memory Saver | Connect a jump starter to the OBD-II Memory Saver and plug it into the car’s OBD port. |
| 2 | Vehicle Sleep | Close all doors and wait 5 minutes to ensure the vehicle’s ECU enters full sleep mode. |
| 3 | Remove Bracket | Use a 10mm socket to loosen the battery base mounting screw and remove the pressure plate. |
| 4 | Gain Space | Push the old battery toward the front of the car to clear the clips, creating more room near the positive terminal. |
| 5 | Disconnect Terminals | Disconnect the Negative (-) terminal first, then the Positive (+) terminal. |
| 6 | Swap Battery | Use a battery handle to lift out the old unit and drop in the new LiFePO4 battery. |
| 7 | Reconnect Terminals | Connect the Positive (+) terminal first, then the Negative (-) terminal. |
| 8 | Secure New Battery | Push the new battery toward the driver’s seat to engage the clips and tighten the base bracket. |
Technical Notes: LN2 Specifications
The MG HS 1.5T uses an LN2 (DIN60) sized battery. When choosing a lithium replacement, ensure the dimensions match (approx. 242 x 175 x 190 mm).
The Houny H585LT2 is a perfect drop-in fit. It features high-quality LiFePO4 cells and a robust BMS that handles the high charging current from modern alternators. After installation, the engine idle should feel noticeably smoother, and the electrical system will respond much faster to heavy loads like A/C and headlights.
The final installation of the Houny LN2 LiFePO4 battery in the MG HS.