Cazd-oz wrote: Good suggestions and may be the only option left it's not really my preference though. Already carrying more equipment paraphernalia than I would like.
And without knowing the root cause I am not confident it will solve the problem.
It seems to me that the root cause is that, for whatever reason, your camera won't charge the battery. You won't know the extent of the issue until you get back home and try it the way you did successfully before you left.
¹ The Lens is the Thing ² 'Full Frame' is the new 'Medium Format' ³ "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.