diff --git a/dsdl/uavcan/equipment/power/722.BatteryInfo.uavcan b/dsdl/uavcan/equipment/power/722.BatteryInfo.uavcan
index 6b164d2f73..64d1a4da87 100644
--- a/dsdl/uavcan/equipment/power/722.BatteryInfo.uavcan
+++ b/dsdl/uavcan/equipment/power/722.BatteryInfo.uavcan
@@ -53,11 +53,10 @@ uint7 state_of_charge_pct_stdev         # SOC error standard deviation; use best
 
 #
 # Battery identification.
-# Instance ID must be unique within the same battery model name.
+# Model instance ID must be unique within the same battery model name.
 # Model name is a human-readable string that normally should include the vendor name, model name, and chemistry
 # type of this battery. This field should be assumed case-insensitive. Example: "Zubax Smart Battery v1.1 LiPo".
 #
-uint32 instance_id                      # Set to zero if not applicable
-uint6 battery_index                     # Identifies the battery within this vehicle, e.g. 0 - primary battery
-uint2 group_id                          # Not used, set zero
+uint8 battery_id                        # Identifies the battery within this vehicle, e.g. 0 - primary battery
+uint32 model_instance_id                # Set to zero if not applicable
 uint8[<32] model_name                   # Battery model name