Hello, i'm from Barcelona (spain) and i decided to install a lightweight battery into my M3. That's why i contacted with Tony from VOLTPHREAKS (
www.voltphreaks.com). I chose to install the VPH900 Lithium Battery.
I'm going to describe how i did the installation of this battery into my e92 M3 with a few pictures:
When i recived the battery with aluminium SAE terminals.
OEM Battery
Battery comparision: 26 kg against 3 kg
I did two small holes to install a plastic bridles
Velcro at the bottom of the battery to avoid sliding.
Velcro in the battery hole and also you can see the small holes.
Voltphreaks Battery, i installed a rope in one side that i tightened with a plastic bridles in the other side.
Rope detail
Plastic bridles detail
Tighten the rope with the bridles
Tightened bridles and the rope
Installation of positive and negative terminals.
Activation button accessivility.
Installation complete
Voltphreaks vynil
The battery is amazing and i haven't had any problems. The battery is very well fixed with this installation.
In voltphreaks website you can find all the battery characteristics.
Ahh one more thing i registered the battery like a 40ah_agm battery!!
I wish this thread can help someone.
Regards!!!