diff --git a/ios/Sources/Models.swift b/ios/Sources/Models.swift
index bade83e..adff696 100644
--- a/ios/Sources/Models.swift
+++ b/ios/Sources/Models.swift
@@ -605,15 +605,28 @@ struct ProductUpdateRequest: Encodable {
     }
 }
 
-struct LotUpdateRequest: Codable {
+struct LotUpdateRequest: Encodable {
     var quantity: Double?
     var bestBefore: String?
     var bestBeforePrecision: String?
+    var locationId: String?
 
     enum CodingKeys: String, CodingKey {
         case quantity
         case bestBefore = "best_before"
         case bestBeforePrecision = "best_before_precision"
+        case locationId = "location_id"
+    }
+
+    // Den Lagerort immer senden (auch null), damit „ohne Ort" den gesetzten Ort
+    // wieder entfernt. Die übrigen Felder bleiben weg, wenn sie nicht gesetzt
+    // sind – das Backend fasst sie dann als „unverändert" auf.
+    func encode(to encoder: Encoder) throws {
+        var c = encoder.container(keyedBy: CodingKeys.self)
+        try c.encodeIfPresent(quantity, forKey: .quantity)
+        try c.encodeIfPresent(bestBefore, forKey: .bestBefore)
+        try c.encodeIfPresent(bestBeforePrecision, forKey: .bestBeforePrecision)
+        try c.encode(locationId, forKey: .locationId)
     }
 }
 
diff --git a/ios/Sources/ProductDetailView.swift b/ios/Sources/ProductDetailView.swift
index 362c3c9..719d5e4 100644
--- a/ios/Sources/ProductDetailView.swift
+++ b/ios/Sources/ProductDetailView.swift
@@ -241,7 +241,10 @@ struct ProductDetailView: View {
                             HStack {
                                 VStack(alignment: .leading, spacing: 2) {
                                     Text("MHD \(display.formatBestBefore(lot.bestBefore, precision: lot.bestBeforePrecision))")
-                                    Text("\(formatAmount(lot.quantity / current.articleUnitFactor)) \(current.articleUnitLabel)")
+                                    // Ohne den Lagerort sehen zwei Chargen mit
+                                    // gleichem MHD identisch aus – er ist hier
+                                    // oft das einzige Unterscheidungsmerkmal.
+                                    Text("\(formatAmount(lot.quantity / current.articleUnitFactor)) \(current.articleUnitLabel) · \(lotLocationLabel(lot))")
                                         .font(.caption).foregroundStyle(.secondary)
                                 }
                                 Spacer()
@@ -286,7 +289,7 @@ struct ProductDetailView: View {
         }
         .sheet(item: $editLot) { lot in
             NavigationStack {
-                LotEditView(lot: lot, product: current) {
+                LotEditView(lot: lot, product: current, locations: locations) {
                     Task { await reload() }
                 }
             }
@@ -364,6 +367,14 @@ struct ProductDetailView: View {
         return Binding(get: { fieldValues[key] ?? "" }, set: { fieldValues[key] = $0 })
     }
 
+    /// Lagerort einer Charge als Pfad („Keller → Regal 2"). Chargen ohne Ort –
+    /// und solche, deren Ort (noch) nicht geladen ist – bleiben „ohne Ort".
+    private func lotLocationLabel(_ lot: Lot) -> String {
+        guard let id = lot.locationId,
+              let ort = locations.first(where: { $0.id == id }) else { return "ohne Ort" }
+        return ort.path(in: locations)
+    }
+
     private func reload() async {
         groups = (try? await APIClient.shared.groups()) ?? []
         categories = (try? await APIClient.shared.categories()) ?? []
@@ -508,10 +519,11 @@ struct ProductByIdView: View {
     }
 }
 
-/// Menge und MHD einer Charge korrigieren.
+/// Menge, MHD und Lagerort einer Charge korrigieren.
 struct LotEditView: View {
     let lot: Lot
     let product: Product
+    let locations: [StorageLocation]
     var onSaved: () -> Void
 
     @Environment(\.dismiss) private var dismiss
@@ -520,6 +532,8 @@ struct LotEditView: View {
     @State private var hasDate = false
     @State private var bestBefore = Date()
     @State private var precision = "day"
+    @State private var locationId: String?
+    @State private var locScanShown = false
     @State private var busy = false
     @State private var error: String?
 
@@ -545,6 +559,19 @@ struct LotEditView: View {
                 }
             }
 
+            if !locations.isEmpty {
+                Section("Lagerort") {
+                    Picker("Lagerort", selection: $locationId) {
+                        Text("– ohne –").tag(String?.none)
+                        ForEach(locations) { l in Text(l.path(in: locations)).tag(String?.some(l.id)) }
+                    }
+                    // Ort per QR am Regal/Fach setzen, statt in der Liste zu suchen.
+                    Button { locScanShown = true } label: {
+                        Label("Lagerort scannen", systemImage: "qrcode.viewfinder")
+                    }
+                }
+            }
+
             if let error {
                 Section { Text(error).foregroundStyle(.red).font(.callout) }
             }
@@ -559,11 +586,16 @@ struct LotEditView: View {
         .toolbar {
             ToolbarItem(placement: .topBarLeading) { Button("Abbrechen") { dismiss() } }
         }
+        .fullScreenCover(isPresented: $locScanShown) {
+            LocationScannerView(locations: locations) { ort in locationId = ort.id }
+                .ignoresSafeArea()
+        }
         .onAppear(perform: fill)
     }
 
     private func fill() {
         quantity = formatAmount(lot.quantity / product.articleUnitFactor)
+        locationId = lot.locationId
         precision = lot.bestBeforePrecision == "month" ? "month" : "day"
         if let raw = lot.bestBefore {
             let formatter = DateFormatter()
@@ -595,7 +627,8 @@ struct LotEditView: View {
                 LotUpdateRequest(
                     quantity: menge * product.articleUnitFactor,
                     bestBefore: hasDate ? formatter.string(from: datum) : nil,
-                    bestBeforePrecision: precision
+                    bestBeforePrecision: precision,
+                    locationId: locationId
                 )
             )
             onSaved()