220*2÷1000=0.44(小时)

　　可以看一下220伏的多助户外电源，自驾游户外做饭还是挺方便的。

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　　1、不考虑其他影响因素：这个电池可以供设备使用0.4小时。

　　2、考虑电池种类：铅酸电池，因为放电深度的问题，正常情况下放电深度保持在85%，这个电池可以满足设备使用0.37小时左右。锂电池，估计你用的也不可能是锂电池。

　　3、考虑使用环境：高温环境下，铅酸电池使用受影响，能有个平时的1半性能就不错了。可供设备使用0.2小时左右。

　　4、考虑使用系统的效率，效率越高，电池可供使用时间越长。电池的供电能力和电池种类，使用环境等有很大关系，不能单纯的说能满足多长时间使用。