Since posting this thread, a few independent manufacturers have started to make camera battery chargers that work off a USB socket.
I sourced a couple of the more compact examples on eBay and these now give me the opportunity to recharge the camera cells in the field.
I will let you know after my next trip how that works out.
I sourced a couple of the more compact examples on eBay and these now give me the opportunity to recharge the camera cells in the field.
I will let you know after my next trip how that works out.