I have looked at a lot of reviews of e road bikes and had settled on the Orbea Gain as the bike That suited my needs best with an auxiliary battery. All of the reviews quoted this auxiliary battery but when checking suppliers they had no knowledge of when this battery would be available. I have contacted Orbea by e mail and they do not have a release date for the battery but have said that they will update their website when they have any progress. It does make me wonder if they would be a reliable supplier but it also makes me doubt The ability of the reviewers. They all quote the auxiliary battery but none of them thought to ask about availability or price. A lot of the reviews just quote the Orbea promotianal material so casts doubt on the integrity of their reviews. I will hold off until I see positive commitment for release of battery or might go for the more expensive Fazua motor.