Nope -- it's a 3000 mAh LiPo power cell with standard USB connectors for recharging from a wall adapter, and for charging anything that can charge from USB.

That's not useful as a high-assurance backup for emergencies. If you don't use it, you won't notice when it gets discharged. If you leave it discharged for a few months, it will break and never recharge. On the other hand, if you do use it, it is by no means guaranteed that it will be full when you have an emergency. By contrast, regular disposable batteries have a shelf life of 8 or 10 years, and some have a shelf life of 15 years.

But there are USB chargers that run off those, too, so you don't really need a special phone.