Antigravity U1R lithium battery for NA/NB

Please note that these are only drop-ins for NAs and NBs. These will technically fit NCs and NDs, but it's a physically smaller battery. The right size is a 51R, which we don't currently carry.  Batteries have always been the densest thing in your car, and the easiest way to lose weight. However, there have always been compromises you have to make. While our new lithium batteries aren't without compromise, the compromises will be a non-issue for most, and they come with a host of advantages beyond their light weight.  But wait! Lithium batteries haven't been used in street cars, right? Not really - Porsche, BMW, Mercedes-Benz, and McLaren have all been using lithium (specifically LiFePO4) batteries in production cars for nearly 10 years.  Why do you want a high quality lithium battery, specifically the Antigravity battery? Here's a quick list:  Save almost 17 lbs over the stock battery (stock is 24 lbs, this one is 7.4 lbs) 8-10 yr lifespan (and a 5 yr warranty) - the initial purchase