In contrast, embedded rechargeable batteries present some unique challenges. They can t always be swapped easily and often require time on a charging cradle. Depending on the application and user circumstances, the latter scenario might not be appropriate. Some wireless devices complicate the predictable life issue with separate battery types for the device and its wireless modem. And under these mixed environment circumstances it s very probable for one battery to die while the other has hours of useful life.
Integrated devices pose unique challenges as well.
Some incorporate separate internal batteries to build the extra wireless transmission power that standard disposable batteries can t provide. Batteries power the wireless devices and in turn your application. Make sure you give yours every opportunity to keep going and going. Durability Like batteries, device durability is another physical issue to consider when evaluating your hardware options. You name it and somebody s probably dropped it there.