Document JBD cell voltage bring-up

docs/hardware-status.md

@@ -467,3 +467,35 @@ Verified:
 - Subsequent reads succeed consistently.
 - Current implementation reads basic pack telemetry only.
 - Cell voltage and cell delta support will require an additional JBD command.
+
+## JBD Cell Voltage Bring-Up Results
+
+### Date
+
+2026-06-04
+
+### Status
+
+PASS
+
+### Verified
+
+- JBD cell voltage command works
+- ESP32 receives cell voltage packet
+- Firmware parses 4 cell voltages
+- Firmware calculates min cell voltage
+- Firmware calculates max cell voltage
+- Firmware calculates cell delta
+
+### Observed Values
+
+- Cell count: 4
+- Minimum cell voltage: 3.336V
+- Maximum cell voltage: 3.337V
+- Cell delta: 1mV
+
+### Notes
+
+- Pack appears well balanced.
+- First BMS status read after boot may timeout, but subsequent reads succeed.
+- This behavior is acceptable for current bring-up.