A couple of comparison pictures of popular 1s LiPo’s for micro helicopters.
Hobby King's Nine Eagles 120, Hyperions 130 for Nine Eagles, Hyperion 160, Turnigy 160, Turnigy Nano-Tech 160, Thunder Power 160, E-Flite 120
Here’s the relative heights. The Nano-Tech is not puffy. They all look like that for some reason, and as you can see…are thicker than the other 1s cells.
Hobby King's Nine Eagles 120, Hyperions 130 for Nine Eagles, Hyperion 160, Turnigy 160, Turnigy Nano-Tech 160, Thunder Power 160, E-Flite 120
