It all depends on what you are trying to use back up power on if you are using a gaming computer it will hold for about 7 minutes(big power supply to run big processors and video cards and such) if you let it sit idle without using power it will last the 16 hours it advertises charging a cell phone probably 121 minutes, along with alot of different variables involved such as how old is it, is the battery reaching the end of its life, things like that
8 years, 10 months ago
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Posted by:
smhee
from
lancaster california