Batteries not included used to be a common refrain, but in the age of lithium ion rechargeable batteries, the trend has been to include a built in battery pack rather than one you source yourself. To make things worse, and as repair site iFixit often laments, gadget makers now tend to favor batteries that are not user replaceable. Since lithium batteries wear out over time, that puts an expiry date on your device. In many cases replacing the battery is technically possible, but isnt officially...
