Antigravity Lifepo4 Lithium Battery installation
We've been testing this battery type since last year on a daily driver/weekend warrior M3 with no absolutely no voltage issues or starting.
The Antigravity batteries come ready to install, no additional parts are needed. In this install, we used the H6-40-RS as it closely matches the OEM battery specs while shedding
43lbs of weight over the stock battery which comes in at . Its size allows the use of the factory battery hold down cleat without the use of battery adapters or trays.
Only tool needed is a 10mm socket.
After installation is completed, the battery needs to be registered like OEM AGM types either through ISTA, Bimmerlink, or BMW independent shop. For the H6-40-RS, choose 40aH AGM setting.
If you have any questions, please ask in the thread or PM.