Originally Posted By: M_a_x
Itīs not that simple. If the battery has some sort of lithium based technology it wont be very forgiving when you violate the loading specs. It might catch fire or explode.

Are you talking about the Solar charger for the spare Note 3 battery? Most likely, I will just pick a cheap official USB charger for that battery with proper connector and 3D print a different casing for the circuit, so it fits better in the Nomad's pocket. Most of the chargers I see are quite bulky looking and/or seems insecure for charging on the go (slot type) when Nomad is hanging from the backpack unfolded.