I've got a couple of thoughts: Strange that it takes so many attempts to get it going? Did you just hold the starter button, or did you give a little throttle? I wonder if there was something wrong with the fueling or ignition signals from the ecu, maybe a loose connection on a sensor? Or perhaps the bike battery was sucking in the power to charge it's self for the first few attempts, and not enough voltage available to start the battery. the batteries do seem to drain easily, but also recharge very very quickly. Mine hadn't run for 2 months while being shipped. and the tracker had run down the battery properly. Mick took a charged battery and pressed it against the fitted one and it started after several attempts. It only ran for a couple of minutes, with no throttle, so bike battery not really recharged. I started the bike again yesterday after another 2 weeks with a micro start booster pack and that also took a few attempts. I'd like to get a volt meter on the bike as it's started. Can the Li-Po battery keep the voltage up as it's cranking, or does it drop to a level where the ecu doesn't fuel or spark properly? Older Land-Rovers use coils intended for less than 12v (don't recall the exact voltage). They are wired through ballast resistors on the coil which was bypassed when the starter motor was running. This meant the coil could still get its ideal voltage when the starter was drawing a lot of current from the battery, and the voltage drops.