So [Travis] decided to upgrade it to make use of the ever-so-common, 18650 lithium-ion battery. Not looking to purchase any components [Travis] performed this hack using simple recycled household ...

"We are excited to introduce the world's first 18650 Potassium-ion battery," said Alexander Girau, CEO of Group1. "This innovation represents years of dedicated research and product development.

The GoPro battery adapter is apparently the very first to support the powerful 18650 cell format and is ... The mighty NCR18650B lithium-ion rechargeable cell from Panasonic.