diff --git a/docs/ROADMAP.md b/docs/ROADMAP.md
index 4189f38..1c8dba0 100644
--- a/docs/ROADMAP.md
+++ b/docs/ROADMAP.md
@@ -27,6 +27,8 @@ Getting the Jetson to see the hardware at all.
 - [ ] Optional: RTC backup battery (CR2032) — without it the clock boots stale
       until NTP or GPS corrects it
 - [ ] Power and mounting in the car: clean shutdown on ignition off
+      (UPS module bench test 2026-10-09: carries the Orin ≥ 20 s across a PD
+      supply swap, enough to ride through cranking)
 
 Tracked in [orin-nano-env-setup](gitea:yukart/orin-nano-env-setup).