While one battery type may be designed for small size and long runtime, this pack will not last and wear out prematurely.A third battery may provide all the desirable attributes, but the price would be too high for commercial use.It even comes with USB Type-C and USB 3.0 ports, as well as a headphjone jack, micro SD memory reader and an HDMI port.We often get puzzled by announcements of new batteries that are said to offer very high energy densities, deliver 1000 charge/discharge cycle and are paper-thin. Another battery may be built for long life, but the size is big and bulky.Battery novices often argue that advanced battery systems are now available that offer very high energy densities, deliver 1000 charge/discharge cycles and are paper thin.These attributes are indeed achievable — unfortunately not in the same battery pack.Background We think of a battery today as a source of portable power, but it is no exaggeration to say that the battery is one of the most important inventions in the history of mankind.
A prismatic Nickel-Metal Hydride battery for a mobile phone, for example, is made for slim geometry.
Such a pack provides an energy density of about 60Wh/kg and the cycle count is around 300.
In comparison, a cylindrical Ni MH offers energy densities of 80Wh/kg and higher.
A given battery may be designed for small size and long runtime, but this pack would have a limited cycle life.
Another battery may be built for durability, but it would be big and bulky.