[spllouder]

Some one should try his . I cant afford to do it so my idea will go here and maybe it can help some one in need .

You can make a very long lasting Battry backup if you wanted to .

Buy 1 to 3 optima dry cell car batterys Blue top marine deep cell batterys .

buy a trickle charge so when the power is on you can charge the batterys and keep them charged so when the power does go out the batterys are fully charged .

Buy a Power Inverter like one you would plug into your car and get 110 volts . You can get a 200 watt one all they up to a 1200 watt one .

Depending on how mant optima car batterys you buy and size of power inverter . i cant see why not it will last up to 36 hours