diff --git a/stacks/observability/prometheus/rules/host.rules.yaml b/stacks/observability/prometheus/rules/host.rules.yaml
index af812af6..64dc1553 100644
--- a/stacks/observability/prometheus/rules/host.rules.yaml
+++ b/stacks/observability/prometheus/rules/host.rules.yaml
@@ -560,8 +560,9 @@ groups:
             The cell's full charge as its firmware measures it, against the
             capacity it was built with. Below 80 % the runtime on a mains cut
             is a guess, and a cell this far into its life is also the one that
-            swells. Order the replacement — docs/runbooks/fit-the-ups-battery.md
-            says what to check after the swap.
+            swells. Order the replacement —
+            docs/runbooks/replace-the-laptop-cell.md says what to check before
+            and after the swap.
 
       - alert: HostBatteryNotReported
         # A laptop that should have a battery and reports none: the cell was
diff --git a/stacks/observability/prometheus/tests/host.test.yaml b/stacks/observability/prometheus/tests/host.test.yaml
index 0ebc2f37..84c31581 100644
--- a/stacks/observability/prometheus/tests/host.test.yaml
+++ b/stacks/observability/prometheus/tests/host.test.yaml
@@ -1074,8 +1074,8 @@ tests:
                 capacity it was built with. Below 80 % the runtime on a mains
                 cut is a guess, and a cell this far into its life is also the
                 one that swells. Order the replacement —
-                docs/runbooks/fit-the-ups-battery.md says what to check after
-                the swap.
+                docs/runbooks/replace-the-laptop-cell.md says what to check
+                before and after the swap.
 
   # --- HostBatteryHealthLow: the energy_* spelling counts too ---------------
   # A driver reporting watt-hours instead of amp-hours. 30 of 50 is 60 %.
@@ -1103,8 +1103,8 @@ tests:
                 capacity it was built with. Below 80 % the runtime on a mains
                 cut is a guess, and a cell this far into its life is also the
                 one that swells. Order the replacement —
-                docs/runbooks/fit-the-ups-battery.md says what to check after
-                the swap.
+                docs/runbooks/replace-the-laptop-cell.md says what to check
+                before and after the swap.
 
   # --- HostBatteryHealthLow: QUIET for prometheus's real reading -------------
   # 6.196 Ah of 6.6 Ah is 94 %, read on 2026-09-12 after 108 cycles. Without