I have emailing Turn Tech batteries and they are a Lithiam Iron phosphate and are the cat's meow. They make a 2.5, 5.0, 7.5 and a 10 Ah. He said that the 5.0 could run dual HID for about 1 hr 45 min. Longer if only 1 HID. Most likely twice as long. The 10 Ah is 3.4 lbs. If there is no power coming from the bike.
The 7.5Ah is $199 the 10Ah is $249, shipping is $10 in the US for either.
The 7.5Ah is 4"x4.5"x3" and the 10Ah is 5"x4.5"x3" (tall by length by
width). They weight 2.5lbs and 3.4lbs.
Interesting......
Alex
I even have a bitchen idea for the battery.
Dirt Bike Mag has a review on a CV4 8-CELL battery. It is lithium-ion-ferrous and quite small,,, 4.3 in.X 3 in. weighing about 1.4 lbs. I went to the website, but it isn't listed there yet. www.cv4.net (800) 448-1223