diff --git a/ereuse_devicehub/inventory/forms.py b/ereuse_devicehub/inventory/forms.py
index 089f4b48..e29900ab 100644
--- a/ereuse_devicehub/inventory/forms.py
+++ b/ereuse_devicehub/inventory/forms.py
@@ -152,7 +152,7 @@ class LotDeviceForm(FlaskForm):
         if self._devices:
             lots = [set(dev.lots) for dev in self._devices]
 
-        if self.action == 'remove' and lots:
+        if self.action == 'del' and lots:
             x = lots[0]
             common_lots = x.intersection(*lots[1:])
             self.lot.choices = [
@@ -160,8 +160,9 @@ class LotDeviceForm(FlaskForm):
             ]
         elif self.action == 'add' and lots:
             x = lots[0]
+            common_lots = x.union(*lots[1:])
             self.lot.choices = [
-                (lot.id, lot.name) for lot in self._lots if lot not in lots
+                (lot.id, lot.name) for lot in self._lots if lot not in common_lots
             ]
         else:
             self.lot.choices = [(lot.id, lot.name) for lot in self._lots]
@@ -1076,10 +1077,17 @@ class TradeDocumentForm(FlaskForm):
 
 class LotDeviceShowForm(FlaskForm):
     devices = StringField(render_kw={'class': "devicesList d-none"})
+    action = StringField(render_kw={'class': "d-none"})
 
     def validate(self, extra_validators=None):
         is_valid = super().validate(extra_validators)
 
+        if not self.devices.data:
+            return False
+
+        if self.action.data not in ['add', 'del']:
+            return False
+
         device_ids = self.devices.data.split(",")
         self._devices = Device.query.filter(Device.id.in_(device_ids)).all()
 
diff --git a/ereuse_devicehub/inventory/views.py b/ereuse_devicehub/inventory/views.py
index 4164b93c..609e487e 100644
--- a/ereuse_devicehub/inventory/views.py
+++ b/ereuse_devicehub/inventory/views.py
@@ -120,7 +120,8 @@ class DeviceListMix(GenericMixView):
             'form_new_datawipe': form_new_datawipe,
             'form_new_trade': form_new_trade,
             'form_filter': form_filter,
-            'form_lot_device_del': LotDeviceShowForm(),
+            'form_lot_device_del': LotDeviceShowForm(action='del'),
+            'form_lot_device_add': LotDeviceShowForm(action='add'),
             'lot': lot,
             'tags': tags,
             'list_devices': list_devices,
@@ -175,31 +176,6 @@ class LotDeviceAddView(View):
         return flask.redirect(next_url)
 
 
-class LotDeviceDeleteShowView(GenericMixView):
-    methods = ['POST']
-    decorators = [login_required]
-    template_name = 'inventory/removeDeviceslot2.html'
-    title = 'Remove from a lot'
-
-    def dispatch_request(self, lot_id=None):
-        # import pdb; pdb.set_trace()
-        next_url = request.referrer or url_for('inventory.devices.devicelist')
-        form = LotDeviceShowForm()
-        if not form.validate_on_submit():
-            messages.error('Error, you need select one or more devices!')
-            if lot_id:
-                next_url = url_for('inventory.devices.lotdevicelist', lot_id=form.id)
-
-            return flask.redirect(next_url)
-
-        lots = self.get_lots()
-        form_lot = LotDeviceForm(
-            devices=form.devices, action='remove', _devices=form._devices
-        )
-        context = {'form': form_lot, 'title': self.title, 'lots': lots}
-        return flask.render_template(self.template_name, **context)
-
-
 class LotDeviceDeleteView(View):
     methods = ['POST']
     decorators = [login_required]
@@ -220,6 +196,36 @@ class LotDeviceDeleteView(View):
         return flask.redirect(next_url)
 
 
+class LotDeviceView(GenericMixView):
+    methods = ['POST']
+    decorators = [login_required]
+    template_name = 'inventory/removeDeviceslot2.html'
+    title = 'Remove from a lot'
+
+    def dispatch_request(self, lot_id=None):
+        # import pdb; pdb.set_trace()
+        url = url_for('inventory.devices.lot_devices_del')
+        next_url = request.referrer or url_for('inventory.devices.devicelist')
+        form = LotDeviceShowForm()
+        if not form.validate_on_submit():
+            messages.error('Error, you need select one or more devices!')
+            if lot_id:
+                next_url = url_for('inventory.devices.lotdevicelist', lot_id=form.id)
+
+            return flask.redirect(next_url)
+
+        if form.action.data == 'add':
+            self.title = 'Add devices to a lot'
+            url = url_for('inventory.devices.lot_devices_add')
+
+        lots = self.get_lots()
+        form_lot = LotDeviceForm(
+            devices=form.devices, action=form.action.data, _devices=form._devices
+        )
+        context = {'form': form_lot, 'title': self.title, 'lots': lots, 'url': url}
+        return flask.render_template(self.template_name, **context)
+
+
 class LotCreateView(GenericMixView):
     methods = ['GET', 'POST']
     decorators = [login_required]
@@ -703,10 +709,7 @@ devices.add_url_rule(
 devices.add_url_rule(
     '/lot/devices/del/', view_func=LotDeviceDeleteView.as_view('lot_devices_del')
 )
-devices.add_url_rule(
-    '/lot/devices/del/show',
-    view_func=LotDeviceDeleteShowView.as_view('lot_devices_del_show'),
-)
+devices.add_url_rule('/lot/devices/', view_func=LotDeviceView.as_view('lot_devices'))
 devices.add_url_rule('/lot/add/', view_func=LotCreateView.as_view('lot_add'))
 devices.add_url_rule(
     '/lot/<string:id>/del/', view_func=LotDeleteView.as_view('lot_del')
diff --git a/ereuse_devicehub/static/js/main_inventory.js b/ereuse_devicehub/static/js/main_inventory.js
index 86c25a82..6b129ee2 100644
--- a/ereuse_devicehub/static/js/main_inventory.js
+++ b/ereuse_devicehub/static/js/main_inventory.js
@@ -180,3 +180,11 @@ function export_file(type_file) {
         $("#exportAlertModal").click();
     }
 }
+
+function lot_devices_del() {
+    $('#lot_devices_del').submit();
+}
+
+function lot_devices_add() {
+    $('#lot_devices_add').submit();
+}
diff --git a/ereuse_devicehub/templates/inventory/device_list.html b/ereuse_devicehub/templates/inventory/device_list.html
index 82988be3..eeb6d226 100644
--- a/ereuse_devicehub/templates/inventory/device_list.html
+++ b/ereuse_devicehub/templates/inventory/device_list.html
@@ -93,11 +93,22 @@
                     </a>
                   </li>
                   <li>
-                    <form method="post" action="{{ url_for('inventory.devices.lot_devices_del_show') }}">
+                    <form id="lot_devices_add" method="post" action="{{ url_for('inventory.devices.lot_devices') }}">
+                      {% for f in form_lot_device_add %}
+                        {{ f }}
+                      {% endfor %}
+                      <a href="javascript:lot_devices_add()" class="dropdown-item">
+                        <i class="bi bi-x"></i>
+                        Add selected Devices to a lot
+                      </a>
+                    </form>
+                  </li>
+                  <li>
+                    <form id="lot_devices_del" method="post" action="{{ url_for('inventory.devices.lot_devices') }}">
                       {% for f in form_lot_device_del %}
                         {{ f }}
                       {% endfor %}
-                      <a href="javascript:void()" onclick="document.review.submit()" class="dropdown-item">
+                      <a href="javascript:lot_devices_del()" class="dropdown-item">
                         <i class="bi bi-x"></i>
                         Remove selected devices from a lot
                       </a>