No experience with this brand new battery technology on my Spyder, but I have the lithium iron phosphate (LiFePO4) battery on my Yamaha YFZ450. The quad has a 15.5:1 piston and is a bitch to start, especially hot. The replacement battery for the quad was the same perimeter, but actually 1" shorter. Stock battery = 7 lbs. Shorai battery = only 2 pounds!!! You take it out of the box and you think you are holding an advertising prop, they are that light. The battery I chose has double the cranking amps of the factory battery. I ride the desert in the summer and the bike starts well at all times when the weather is 100+ deg.
I can tell you that Shorai was great support on a warranty situation. I had the misfortune of trying to trickle charge the battery when not riding using a Harbor Freight unregulated 15W solar panel. Even with the makeshift voltage regulator I built for the panel, it resulted in overcharging and expanding the battery case. Acted strange in that unloaded the battery read over 16V volts, but quickly dropped to near nothing under load. Shorai handles all their warranties out of a CA office. They shipped me a replacement battery received in 4 days without waiting for the defective battery return. Awesome support. Sure hope they don't read this post or I may hear from them.
Now use a BatteryTender product. Keeps it peaked nicely, no over-voltage, no starting issues. Four months use now. They are expensive. Have no idea what the actual desert lifetime will be, but I believe they are two year free replacement.
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