This is in regard with another question of mine, how do you make a discharge curve with the y-axis of voltage and x-axis of amp - hour?


You just relabel the X axis. When you discharge at a constant current, the hours are directly proportional to the amp-hours.

For example, if you're discharging at 50 mA and your X-axis runs from 0 to 20 hours, you could simply relabel it as 0 to 1.0 A-h.

  • \$\begingroup\$ Ok, but when you say "discharging at 50mA," you mean the load is rated at 50 mA, right? \$\endgroup\$ – user5139637 Aug 3 '15 at 15:15
  • \$\begingroup\$ So, if I discharge my battery at say a load of 20mA, and it runs for 20 hours, then (like you said(, I could relabel the axis as 0 - 0.4 Ah? \$\endgroup\$ – user5139637 Aug 3 '15 at 15:17
  • \$\begingroup\$ Yes, and yes. It's really quite simple. \$\endgroup\$ – Dave Tweed Aug 3 '15 at 15:22
  • \$\begingroup\$ I have one more question: what is the process for the load selection, that is, is there a way to figure out what load you should use to make your discharge curve (based on the battery)? \$\endgroup\$ – user5139637 Aug 3 '15 at 20:29
  • \$\begingroup\$ Dave, the load would have to be constant right? A 28 mA LED won't do the job right? \$\endgroup\$ – user5139637 Aug 3 '15 at 22:06

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