[Maxxsirrah]

Originally Posted by NGR

I think there's an 8 year warranty on the battery packs so spares will be around for a while. If you want to keep the car as a future classic (i.e. decades), you could always buy a battery pack and keep it in reserve for future fitment.

Incidentally I also have a Renault Zoe which is fully electric and they've just released a new model with double the range but the same physical battery dimensions - the pack can actually be retro-fitted to an older car doubling the range. Hope this is possible with the i8, would be good to know that a knackered battery could be replaced with a better one!

Yes there is an 8 year warranty on the battery in an i8.

The individual cells are the same as those in an i3. Bmw have also commited to using the same cell dimensions as they develop their batteries so that in the future you can replace old with new. In reality the cells will get more powerful, so you should be able to replace the i8 battery with less cells to reduce the weight of the car or with the same number of cells for greater output. I did my research before committing to buy.