diff --git a/http/androidsmsgateway/webhooks.go b/http/androidsmsgateway/webhooks.go
index d2fa9dd..6777ab6 100644
--- a/http/androidsmsgateway/webhooks.go
+++ b/http/androidsmsgateway/webhooks.go
@@ -128,14 +128,14 @@ type DeviceHealth struct {
 
 // DeviceChecks holds the individual health checks reported by the device.
 // Go field names are camelCase; json tags carry the colon-delimited API key names.
-// csv tags use descriptive column names that reflect the unit of each observation.
+// csv tags mirror the documentation key names with underscores instead of colons.
 type DeviceChecks struct {
-	BatteryCharging     HealthCheck     `json:"battery:charging"     csv:"charging_flags"`
-	BatteryLevel        HealthCheck     `json:"battery:level"        csv:"battery_percent"`
-	ConnectionCellular  HealthCheck     `json:"connection:cellular"  csv:"cellular_index"`
-	ConnectionStatus    BoolHealthCheck `json:"connection:status"    csv:"internet_connected"`
-	ConnectionTransport HealthCheck     `json:"connection:transport" csv:"transport_flags"`
-	MessagesFailed      HealthCheck     `json:"messages:failed"      csv:"failed_messages"`
+	BatteryCharging     HealthCheck     `json:"battery:charging"     csv:"battery_charging"`
+	BatteryLevel        HealthCheck     `json:"battery:level"        csv:"battery_level"`
+	ConnectionCellular  HealthCheck     `json:"connection:cellular"  csv:"connection_cellular"`
+	ConnectionStatus    BoolHealthCheck `json:"connection:status"    csv:"connection_status"`
+	ConnectionTransport HealthCheck     `json:"connection:transport" csv:"connection_transport"`
+	MessagesFailed      HealthCheck     `json:"messages:failed"      csv:"messages_failed"`
 }
 
 // HealthCheck represents a single named health check result.