These days it seems like everything is becoming a “smart” device. Even the batteries that power smart devices are becoming “smart.” A conventional battery simply exposes positive and return terminals. You’re left to figure out how to use the battery. In contrast, a smart battery looks after itself, tells you what its status is, and even lets you control what it’s doing. Sounds great, doesn’t it? But do you really need a smart battery? And if you do need a smart battery, what’s actually involved in making one?