The 3000mAh TalentCell lithium-ion battery provides a 12v DC jack that can be used to power QRP radios in the field (or shack). It comes with a charger and a cable that can be used by most QRP radios. AND IT’S ONLY $25!
Note: There is a general lack of truth about the true voltage of these three-cell battery packs. And the performance varies, based on the quality of the Li-ion cells used to build the pack. The Li-ion internal battery I purchased from Elecraft for my KX2 has 3 Li-ion cells, just like the battery shown in the video. It has a TENERGY-brand sticker and the label says, “Li-ion 10.8V 2600mAh”. These batteries all have an initial voltage that is close to 12v but they quickly (minutes) settle down to 11v. These cells are typically the Li-ion 18650 cells that are 3.7v each. So, it’s a stretch to market them as a three-cell 12v battery pack! But, it’s still good enough for my trail-friendly QRP radios. The 8AA NMH battery pack I’ve been using for my MTR-5B has lower voltage than this $25 Li-ion battery, was a PITA to charge, and weighs 60%+ more. So, this Li-ion battery pack isn’t perfect but I still think it’s a good solution for anyone who wants to power a trail-friendly QRP rig. – Cliff