Low voltage protector for systems battery

A battery cut-out device to interpose between a battery terminal and an existent battery lead connected thereto, said battery cut-out device having a housing to co-locate with the battery, said battery cut-out device having a first high current capacity termination to connect to said battery terminal in place of the existent battery lead, and said battery cut-out device having a second high current capacity termination to connect to the existent battery lead, said battery cut-out device having a fly lead to connect to a terminal of opposite polarity forming a circuit with said battery terminal to provide a power supply for said battery cut-out device, said battery cut-out device having a high current capacity switch selectively connecting between said first high current capacity termination and said second high current capacity termination to make or break the connection therebetween, said high current capacity switch being controlled by a monitoring circuit that senses if a voltage equating to the battery voltage drops below a predetermined level indicative of at least 5% capacity remaining of said rated battery capacity and remains below said predetermined level for a predetermined period of at least five seconds, said monitoring circuit having an output interfaced with said high current capacity switch, said output changing state on said monitoring circuit sensing said voltage equating to the battery voltage dropping below said predetermined level and remaining below said predetermined level for said predetermined period, to deactuate said high current capacity switch;

• said battery cut-out device including a manually actuable reset switch to reset and reactuate said high current capacity switch.