I think that you will find more compatibility of components, including the battery, in the under $2k range bikes as they are mostly made in China and are sourced via Alibaba which if you look through there you will see a lot of repetition in the basic designs but with different grade components and frame styles.
I don't think you will see any battery standards implemented within the Specializeds, Haibikes, Bulls, Focus, etc. due to their need to have proprietary systems that they can advertise as better than the other guys. They can't even get together on bb standards!
In the battery world what I am most excited about are improvements in battery chemistry that will provide better c rates and charge rates in a lighter format. Not there yet but people are working on it every day. I do find it funny though that some manufacturers are "doubling" their mileage by adding another battery. Who knew it could be that simple until they came up with the concept?
I don't think eBikes should be treated like iPhone's or cordless tools. I'm sure their are plenty of people willing to fork out large sums of cash for the latest and greatest eBike, but I need some confidence when looking at eBikes in the $3,000 to $5,000 range.
Yes exactly! I would be interested in the 17.4Ah since that would fit on my eBike that uses the same Reention form-factor. The 21Ah seems too tall for the location of the downtube on my eBike and would interfere with the angled top tube.Except, possibly, mechanically they would be compatible with other bikes.