Autonomous lawn mower and a system for navigating thereof

An autonomous lawn mower comprising:

• a mower body having at least one motor arranged to drive a cutting blade and to propel the mower body on an operating surface via a wheel arrangement, wherein the mower body includes a navigation system arranged to assist a controller to control operation of the mower body within a predefined operating area;
• and
• a battery module arranged to provide power supply to the motor;
• wherein the battery module is placed at a lower position within a rear of the mower body;
• wherein the mower body further includes a cutter module separate from the cutting blade and arranged to trim an edge of the predefined operating area;
• wherein the cutter module is placed at a position underneath the mower body and adjacent to an operating circumference of the cutting blade;
• wherein the cutter module is removably engaged with the mower body through a locking mechanism;
• wherein the locking mechanism includes a male mating portion for mating with a female mating portion, the male mating portion being provided on one of the mower body and the cutter module, and the female mating portion being provided on another one of the mower body and the cutter module;
• and
• wherein the coupling of the male mating portion and the female mating portion configures the cutter module to be electrically coupled to the controller of the mower body.