I have been driving for the past couple days with a 15lb battery and so far so good. Strong cranks, even on short trips.
The battery is a tempest bab26-12. I learned about it while on lotustalk forums where it was received well. Advertised as 15lb but my weight scale came in at 14.9lb. My stock battery, which was an interstate weighed 43.4lb. I'll update with a review on the tempest if anyone is interested.
15lb battery $93 shipped
custom bracket and L hooks $8
husky tie down strap $7
xs power SAE short terminals $10
2x m5 philips screw $ 1
(optional) jumper cables $17
