Degradation example update

CHANGELOG.md

@@ -15,6 +15,7 @@
 
 ## Bug fixes
 
+- Reverted a change to the coupled degradation example notebook that caused it to be unstable for large numbers of cycles ([#3691](https://github.com/pybamm-team/PyBaMM/pull/3691))
 - Fixed a bug where simulations using the CasADi-based solvers would fail randomly with the half-cell model ([#3494](https://github.com/pybamm-team/PyBaMM/pull/3494))
 - Fixed bug that made identical Experiment steps with different end times crash ([#3516](https://github.com/pybamm-team/PyBaMM/pull/3516))
 - Fixed bug in calculation of theoretical energy that made it very slow ([#3506](https://github.com/pybamm-team/PyBaMM/pull/3506))

docs/source/examples/notebooks/models/coupled-degradation.ipynb

@@ -105,22 +105,21 @@
     "cycle_number = 10\n",
     "exp = pybamm.Experiment(\n",
     "    [\n",
-    "        \"Hold at 4.2 V until C/100\",\n",
-    "        \"Rest for 4 hours\",\n",
-    "        \"Discharge at 0.1C until 2.5 V\",  # initial capacity check\n",
-    "        \"Charge at 0.3C until 4.2 V\",\n",
-    "        \"Hold at 4.2 V until C/100\",\n",
+    "        \"Hold at 4.2 V until C/100 (5 minute period)\",\n",
+    "        \"Rest for 4 hours (5 minute period)\",\n",
+    "        \"Discharge at 0.1C until 2.5 V (5 minute period)\",  # initial capacity check\n",
+    "        \"Charge at 0.3C until 4.2 V (5 minute period)\",\n",
+    "        \"Hold at 4.2 V until C/100 (5 minute period)\",\n",
     "    ]\n",
     "    + [\n",
     "        (\n",
     "            \"Discharge at 1C until 2.5 V\",  # ageing cycles\n",
-    "            \"Charge at 0.3C until 4.2 V\",\n",
-    "            \"Hold at 4.2 V until C/100\",\n",
+    "            \"Charge at 0.3C until 4.2 V (5 minute period)\",\n",
+    "            \"Hold at 4.2 V until C/100 (5 minute period)\",\n",
     "        )\n",
     "    ]\n",
     "    * cycle_number\n",
-    "    + [\"Discharge at 0.1C until 2.5 V\"],  # final capacity check\n",
-    "    period=\"5 minutes\",\n",
+    "    + [\"Discharge at 0.1C until 2.5 V (5 minute period)\"],  # final capacity check\n",
     ")\n",
     "sim = pybamm.Simulation(model, parameter_values=param, experiment=exp, var_pts=var_pts)\n",
     "sol = sim.solve()"