This is a non-destructive conversion of a Bauker/Hawksmoor grass trimmer/strimmer to use Makita LXT batteries.
This tool is an absolute bargin for £24 as a bare tool (no batter/charger) from Toolstation in the UK:
https://www.toolstation.com/hawksmoor-18v-25cm-cordless-grass-trimmer/p20910
The conversion is non-destructive due to use of blade connectors, but it can also be installed permantly, for a more robust solution, with some self-tapping screws.
Note that this requires addition items:
Instructions:
Remixed from these designs on thingiverse:
Makita-Ryobi adaptor: https://www.thingiverse.com/thing:1811192
Worx tool holder: https://www.thingiverse.com/thing:4799718
This solution may also be compatible with other tools from Bauker/Hawksmoor or also possibly Worx, Ferrex/Workzone and other Positec brands that share the same battery ecosystem - if you have success with other tools leave a comment!
The author hasn't provided the model origin yet.