Are the lithium ion lightweight batteries really worth what they cost? Is a 16 volt setup better for a track only nitrous car? I'm very interested in a lightweight battery for the weight savings, just hard to drop 1500-2000 dollars on something your not that familiar with. Wondering how 16 volts effects nitrous tunes, fuel pressure, ignition spark, etc. Also wondering about the durability of these lithium batteries? Is there any 1 particular brand to buy, or need to stay away from? Any help with this is greatly appreciated. Thanks guys.