Changing battery from NS70 to NS 60 would not have any problem at all. NS70 means the maximum current load is 70A. In most cases it is more than enough unless you have installed 10 high power spotlight together with multiple high power ICE amplifiers.
Normally diesel power engine like trucks would require high current battery rating bcos it needs to crank a huge starter motor which require a high current to start.
Normally diesel power engine like trucks would require high current battery rating bcos it needs to crank a huge starter motor which require a high current to start.