I'm hoping somebody can help me understand this. I use a Resmed S9 VPAP ST-A/ S9 COPD which according to documentation at my settings draws a current of 1.4A.
I use a Resmed Powerstation 2 battery. The ratings on the back say 97Wh output 24V 3.75A.
I wanted to calculate how long this battery would last. I know it lasts for around 10hrs but i'd like to know how to work it out.
I started by working out the amp hours by dividing 97 by 24 = 4.041 which I thought was the amp hours. I then divided this by 1.4 which gives me 2.8hrs which I know is not right. I'm no expert on this sort of thing and obviously missing or not understanding something. Please can somebody help! Thanks in advance