I understand from a very reliable source at the company that it is their intent to offer an upgrade to newer technology (i.e., better range) batteries when it comes time to replace our batteries. This is fantastic news in my opinion. I don't know how the battery replacement option will play into this. I suspect that the current BRO ($8/10/12k) will get you a "like new" equivalent of your current battery, and that the newer technology battery will be available for a premium. Theoretically you could pay a "double premium" and upgrade to the newer technology and upgrade the level of battery (e.g., low-end equivalent to mid-or high-end equivalent) although they may very well decide against making the upgrade choices that wide open. I also suspect that we will be able to purchase the newer technology battery outright, without the BRO, perhaps for a slight premium over what people who bought the BRO paid given the time value of money.