The electronic key start of this generator is battery powered, which means that it doesn’t last forever, and sooner or later, you will have to replace it. The Duromax XP4400E battery replacement is quite a popular request, so the answer should be enlightened.
You can easily find the Duromax generator battery for replacement in some online stores. But I’ve discovered that lots of Duromax 4400 watt generator reviews do not recommend buying them. The reason is that it does not actually fit in the generator. After doing some research, I found some alternatives: FirstPower FPM7-12 and Mighty Max YTX5L-BS batteries.