Differences

This shows you the differences between two versions of the page.

--- eeng:topics:batteries:start [2024/09/29 15:54] – rolf
+++ eeng:topics:batteries:start [2024/09/29 16:05] (current) – [Capacity] rolf
@@ Line 1: / Line 1: @@
 ====== Batteries ======
-  * [[https://www.pveducation.org/pvcdrom/battery-characteristics/battery-capacity|Adafruit on Batteries]]
+  * [[https://learn.adafruit.com/all-about-batteries/power-capacity-and-power-capability|Adafruit on Batteries]]
-  * [[https://learn.adafruit.com/all-about-batteries/power-capacity-and-power-capability|PV Education on Batteries]]
+  * [[https://www.pveducation.org/pvcdrom/battery-characteristics/battery-capacity|PV Education on Batteries]]
   * {{https://biz.maxell.com/en/primary_batteries/CR2032HR_DataSheet_20e.pdf|CR2032 Cell from Maxwell}}
   * [[https://biz.maxell.com/en/primary_batteries/cr_heat-resisting.html|CR type cells, heat resisting, Maxwell]]
+==== Capacity ====
 The battery capacity $C$ is often given in $\mathrm{Ah}$ (Ampère hours) or $\mathrm{mAh}$ (milli-Ampère hours).
 \\ In fact, the unit $\mathrm{As} = \mathrm{C}$ (Coulomb) is the amount of available electrical charge in the battery.
 \\ Example: If a battery of $C = 1\,\mathrm{Ah}$ is discharged with a current of $1\,\mathrm{A}$ then it takes 1 hour until it is discharged.
+| {{https://cdn-learn.adafruit.com/assets/assets/000/004/149/original/components_graph_03.gif?600&direct}} |
+| Discharging a coin cell with different constant resistors. Lower resistance = higher current. \\ Source: [[https://learn.adafruit.com/all-about-batteries/power-capacity-and-power-capability|Adafruit]] |
 Examples: