The battery in a battery generator is used for starting the generator. When the service life of the battery expires or when the battery dies due to improper maintenance or any other reason, it is time to replace the old battery present in your generator with a new one. This replacement is, of course, a technical task. But, when you familiarize yourself with the positive and negative poles in a generator set, you can replace the battery yourself. Here is what you will have to do to replace the battery in your generator: · If your generator has a key start switch, turn it off. Then, get rid of the key and all electrical loads connected to the generator. · Now, switch off the battery charger and plug out the charger. · You will find that the negative wire is connected to the negative extreme of the battery. Now, put out this cable from the negative extreme. · Do the same for the positive terminal as well. · Remove the dead battery from the generator. · Now, place the new battery in the same position from which you removed the old battery. But, before you connect the cable, ensure that the key start switch in the generator is in a de-energized position. · Now, connect the cable to the starting motor to the positive terminal of the battery. · Connect the cable from the base to the negative terminal of the battery. Now, you can switch on the generator. Also, make sure that you do not send the old battery to the trash as it is. Most local authorities have specific rules for discarding old batteries. You should follow your local laws to discard the old battery.