Here at Boost Logic we are all about weight savings. We are now offering two new lightweight battery kits for the R35. The kit will include our Boost Logic billet aluminum bracket and all necessary hardware to install in your GT-R and replace the hefty 28lb factory battery. ETX900 4.9 lbs Capacity: 15.6 Ah Pulse Crank Amps: 840A Cold Crank Amps: 400A ETX1200 6.9 lbs Capacity: 24.8 Ah Pulse Crank Amps: 1200A Cold Crank Amps: 600A 80% lighter than a lead acid battery Offers deep cycle ability with a high rate of discharge capability No freezing, boiling, corroding, or sulfating Works well outdoors in the heat and have a higher temperature rating than lead acid batteries If properly sized, these batteries can work well in cold as they don’t get damaged by freezing as lead acid batteries do Quick, easy, and rechargeable energy source (solar charging is a great solution for outdoor applications) Last significantly longer than a lead acid battery Saves you money, as you don’t need to constantly replace batteries