You could use something like that.......they are for maintaining the battery, over a long time! So it is always ready to use!
I have heard in the end, the battery will dry out. When using a maintainer thing!
You could just use your AC/DC field charger, to do the job! Or just buy a standard car battery charger! You can get them from around £20+ etc etc!
To me that sounds straight! Do you have 3 sets of wires? Or only 2 ?
e.g if you have three, mains, cig lighter "male or female?" and x2 croc clips..........?
Anyway I would always charge fr