Bosch has brought two new compact sabre saws to the market! Much like the Milwaukee Hackzall, these reciprocating saws are made to be used single-handed. Both the 10.8V and 18V products have their place, but which will suit you better?
http://amzn.to/2tvHW3w
http://www.bosch-pt.com.au/au/en/cordless-sabre-saw-gsa-18-v-li-c-225590-06016a5001.html