Battery Power for Lawn equipment -- is it time?

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The original charge port is protected by an embedded 30 amp green micro fuse that can't be replaced without replacing the whole charging port assembly at about $70 plus labor.

My replacement uses two 15 amp ATC automotive fuses on both the positive and negative legs of the charging circuit.

I've seen conversions done by others that have no protection. Should the charging circuit be short circuited, the amount of current passing through the wires would definitely melt the insulation and likely cause a fire.

Safety is very important.