Does anyone know if they made any design changes for the Surface Pro 3 vs the older models that will allow worn out/degraded batteries to be replaced out of warranty at a cost comparable to what Apple charges for replacing sealed batteries on MacBook Airs and iPads ($99 to $129 range)? The previous Surface Pro models had a battery that was installed/manufacured in a way that made future battery replacements close to impossible even by trained repair technicians. So, if you have an out of warranty Surface where the battery life is no longer meeting your needs due to normal aging over time, your battery replacement through Microsoft consists of trading the whole unit in for a refurb at a cost of somewhere around $500. See previous link for details: New battery replacement cost from MS? - Microsoft Community Probably not worth spending that money on your, now outdated, Surface. This makes your device disposable after a couple of years other than maybe using it as a desktop PC always plugged into A/C power. The only workaround for this issue I have seen if someone suggesting that you buy the accidental damage insurance at extra cost and "making sure" the device gets damaged beyond repair before the coverage expires so you get a new battery in the replacement device. Tacky, and I'm not sure that would even work. It would be great if Microsoft made the battery replacement possible at a reasonable cost on the the Surface Pro 3. Ridiculous battery replacement costs will keep me from seriously considering buying a Surface. Even if I wanted to get a new model in 2 years anyway, I would like my old unit to have a replaceable battery so that it will worth something when selling it. If the battery is worn out or down to only a couple hours and it costs too much to replace the battery, it will be difficult to sell the device for more than a "give away" price.