diff --git a/pyproject.toml b/pyproject.toml
index 8fc4c449f7..cb71bb499b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,9 +23,10 @@ dependencies = [
     "numpy",
     "threadpoolctl>=3.0.0",
     "tqdm",
-    "zarr>=0.2.16",
+    "zarr>=2.16,<2.18",
     "neo>=0.13.0",
     "probeinterface>=0.2.21",
+    "packaging",
 ]
 
 [build-system]
diff --git a/src/spikeinterface/core/analyzer_extension_core.py b/src/spikeinterface/core/analyzer_extension_core.py
index 3a4561822e..e5691603ac 100644
--- a/src/spikeinterface/core/analyzer_extension_core.py
+++ b/src/spikeinterface/core/analyzer_extension_core.py
@@ -499,6 +499,7 @@ def get_templates(self, unit_ids=None, operator="average", percentile=None, save
                 channel_ids=self.sorting_analyzer.channel_ids,
                 unit_ids=unit_ids,
                 probe=self.sorting_analyzer.get_probe(),
+                is_scaled=self.sorting_analyzer.return_scaled,
             )
         else:
             raise ValueError("outputs must be numpy or Templates")
diff --git a/src/spikeinterface/core/channelsaggregationrecording.py b/src/spikeinterface/core/channelsaggregationrecording.py
index 9ec7ca8d4d..b8735dff3c 100644
--- a/src/spikeinterface/core/channelsaggregationrecording.py
+++ b/src/spikeinterface/core/channelsaggregationrecording.py
@@ -14,18 +14,31 @@ class ChannelsAggregationRecording(BaseRecording):
     """
 
     def __init__(self, recording_list, renamed_channel_ids=None):
+
+        # Generate a default list of channel ids that are unique and consecutive numbers as strings.
         channel_map = {}
+        num_all_channels = sum(rec.get_num_channels() for rec in recording_list)
 
-        num_all_channels = sum([rec.get_num_channels() for rec in recording_list])
         if renamed_channel_ids is not None:
-            assert len(np.unique(renamed_channel_ids)) == num_all_channels, (
-                "'renamed_channel_ids' doesn't have the " "right size or has duplicates!"
-            )
+            assert (
+                len(np.unique(renamed_channel_ids)) == num_all_channels
+            ), "'renamed_channel_ids' doesn't have the right size or has duplicates!"
             channel_ids = list(renamed_channel_ids)
         else:
-            channel_ids = list(np.arange(num_all_channels))
+            # Collect channel IDs from all recordings
+            all_channels_have_same_type = np.unique([rec.channel_ids.dtype for rec in recording_list]).size == 1
+            all_channel_ids_are_unique = False
+            if all_channels_have_same_type:
+                combined_ids = np.concatenate([rec.channel_ids for rec in recording_list])
+                all_channel_ids_are_unique = np.unique(combined_ids).size == num_all_channels
+
+            if all_channels_have_same_type and all_channel_ids_are_unique:
+                channel_ids = combined_ids
+            else:
+                # If IDs are not unique or not of the same type, use default as stringify IDs
+                default_channel_ids = [str(i) for i in range(num_all_channels)]
+                channel_ids = default_channel_ids
 
-        # channel map maps channel indices that are used to get traces
         ch_id = 0
         for r_i, recording in enumerate(recording_list):
             single_channel_ids = recording.get_channel_ids()
@@ -49,7 +62,9 @@ def __init__(self, recording_list, renamed_channel_ids=None):
                 break
 
         if not (ok1 and ok2 and ok3 and ok4):
-            raise ValueError("Sortings don't have the same sampling_frequency/num_segments/dtype/num samples")
+            raise ValueError(
+                "Recordings do not have consistent sampling frequency, number of segments, data type, or number of samples."
+            )
 
         BaseRecording.__init__(self, sampling_frequency, channel_ids, dtype)
 
@@ -91,7 +106,7 @@ def __init__(self, recording_list, renamed_channel_ids=None):
             self.add_recording_segment(sub_segment)
 
         self._recordings = recording_list
-        self._kwargs = {"recording_list": [rec for rec in recording_list], "renamed_channel_ids": renamed_channel_ids}
+        self._kwargs = {"recording_list": recording_list, "renamed_channel_ids": renamed_channel_ids}
 
     @property
     def recordings(self):
@@ -173,11 +188,11 @@ def aggregate_channels(recording_list, renamed_channel_ids=None):
     recording_list: list
         List of BaseRecording objects to aggregate
     renamed_channel_ids: array-like
-        If given, channel ids are renamed as provided. If None, unit ids are sequential integers.
+        If given, channel ids are renamed as provided.
 
     Returns
     -------
-    aggregate_recording: UnitsAggregationSorting
-        The aggregated sorting object
+    aggregate_recording: ChannelsAggregationRecording
+        The aggregated recording object
     """
     return ChannelsAggregationRecording(recording_list, renamed_channel_ids)
diff --git a/src/spikeinterface/core/generate.py b/src/spikeinterface/core/generate.py
index ec76fcbaa9..05c1ebc7ed 100644
--- a/src/spikeinterface/core/generate.py
+++ b/src/spikeinterface/core/generate.py
@@ -1448,7 +1448,7 @@ def generate_templates(
     mode="ellipsoid",
 ):
     """
-    Generate some templates from the given channel positions and neuron position.s
+    Generate some templates from the given channel positions and neuron positions.
 
     The implementation is very naive : it generates a mono channel waveform using generate_single_fake_waveform()
     and duplicates this same waveform on all channel given a simple decay law per unit.
diff --git a/src/spikeinterface/core/sortinganalyzer.py b/src/spikeinterface/core/sortinganalyzer.py
index 3ce20a0209..d57df2b5ae 100644
--- a/src/spikeinterface/core/sortinganalyzer.py
+++ b/src/spikeinterface/core/sortinganalyzer.py
@@ -195,7 +195,7 @@ def __init__(
     ):
         # very fast init because checks are done in load and create
         self.sorting = sorting
-        # self.recorsding will be a property
+        # self.recording will be a property
         self._recording = recording
         self.rec_attributes = rec_attributes
         self.format = format
diff --git a/src/spikeinterface/core/template.py b/src/spikeinterface/core/template.py
index 51688709b2..4eb82be2d6 100644
--- a/src/spikeinterface/core/template.py
+++ b/src/spikeinterface/core/template.py
@@ -30,9 +30,11 @@ class Templates:
         Array of unit IDs. If `None`, defaults to an array of increasing integers.
     probe: Probe, default: None
         A `probeinterface.Probe` object
+    is_scaled : bool, optional default: True
+        If True, it means that the templates are in uV, otherwise they are in raw ADC values.
     check_for_consistent_sparsity : bool, optional default: None
         When passing a sparsity_mask, this checks that the templates array is also sparse and that it matches the
-        structure fo the sparsity_masl.
+        structure of the sparsity_mask. If False, this check is skipped.
 
     The following attributes are available after construction:
 
@@ -58,6 +60,7 @@ class Templates:
     templates_array: np.ndarray
     sampling_frequency: float
     nbefore: int
+    is_scaled: bool = True
 
     sparsity_mask: np.ndarray = None
     channel_ids: np.ndarray = None
@@ -193,6 +196,7 @@ def to_dict(self):
             "unit_ids": self.unit_ids,
             "sampling_frequency": self.sampling_frequency,
             "nbefore": self.nbefore,
+            "is_scaled": self.is_scaled,
             "probe": self.probe.to_dict() if self.probe is not None else None,
         }
 
@@ -205,6 +209,7 @@ def from_dict(cls, data):
             unit_ids=np.asarray(data["unit_ids"]),
             sampling_frequency=data["sampling_frequency"],
             nbefore=data["nbefore"],
+            is_scaled=data["is_scaled"],
             probe=data["probe"] if data["probe"] is None else Probe.from_dict(data["probe"]),
         )
 
@@ -238,6 +243,7 @@ def add_templates_to_zarr_group(self, zarr_group: "zarr.Group") -> None:
 
         zarr_group.attrs["sampling_frequency"] = self.sampling_frequency
         zarr_group.attrs["nbefore"] = self.nbefore
+        zarr_group.attrs["is_scaled"] = self.is_scaled
 
         if self.sparsity_mask is not None:
             zarr_group.create_dataset("sparsity_mask", data=self.sparsity_mask)
diff --git a/src/spikeinterface/core/template_tools.py b/src/spikeinterface/core/template_tools.py
index 11581a49ce..fead805ab5 100644
--- a/src/spikeinterface/core/template_tools.py
+++ b/src/spikeinterface/core/template_tools.py
@@ -58,6 +58,7 @@ def get_template_amplitudes(
     peak_sign: "neg" | "pos" | "both" = "neg",
     mode: "extremum" | "at_index" = "extremum",
     return_scaled: bool = True,
+    abs_value: bool = True,
 ):
     """
     Get amplitude per channel for each unit.
@@ -73,6 +74,8 @@ def get_template_amplitudes(
         "at_index": take value at spike index
     return_scaled: bool, default True
         The amplitude is scaled or not.
+    abs_value: bool = True
+        Whether the extremum amplitude should be returned as an absolute value or not
 
     Returns
     -------
@@ -96,17 +99,18 @@ def get_template_amplitudes(
             if peak_sign == "both":
                 values = np.max(np.abs(template), axis=0)
             elif peak_sign == "neg":
-                values = -np.min(template, axis=0)
+                values = np.min(template, axis=0)
             elif peak_sign == "pos":
                 values = np.max(template, axis=0)
         elif mode == "at_index":
             if peak_sign == "both":
                 values = np.abs(template[before, :])
-            elif peak_sign == "neg":
-                values = -template[before, :]
-            elif peak_sign == "pos":
+            elif peak_sign in ["neg", "pos"]:
                 values = template[before, :]
 
+        if abs_value:
+            values = np.abs(values)
+
         peak_values[unit_id] = values
 
     return peak_values
@@ -160,7 +164,7 @@ def get_template_extremum_channel(
     extremum_channels_id = {}
     extremum_channels_index = {}
     for unit_id in unit_ids:
-        max_ind = np.argmax(peak_values[unit_id])
+        max_ind = np.argmax(np.abs(peak_values[unit_id]))
         extremum_channels_id[unit_id] = channel_ids[max_ind]
         extremum_channels_index[unit_id] = max_ind
 
@@ -227,6 +231,7 @@ def get_template_extremum_amplitude(
     templates_or_sorting_analyzer,
     peak_sign: "neg" | "pos" | "both" = "neg",
     mode: "extremum" | "at_index" = "at_index",
+    abs_value: bool = True,
 ):
     """
     Computes amplitudes on the best channel.
@@ -241,6 +246,9 @@ def get_template_extremum_amplitude(
         Where the amplitude is computed
         "extremum":  max or min
         "at_index": take value at spike index
+    abs_value: bool = True
+        Whether the extremum amplitude should be returned as an absolute value or not
+
 
     Returns
     -------
@@ -260,7 +268,7 @@ def get_template_extremum_amplitude(
         return_scaled = True
 
     extremum_amplitudes = get_template_amplitudes(
-        templates_or_sorting_analyzer, peak_sign=peak_sign, mode=mode, return_scaled=return_scaled
+        templates_or_sorting_analyzer, peak_sign=peak_sign, mode=mode, return_scaled=return_scaled, abs_value=abs_value
     )
 
     unit_amplitudes = {}
diff --git a/src/spikeinterface/core/tests/test_channelsaggregationrecording.py b/src/spikeinterface/core/tests/test_channelsaggregationrecording.py
index 944c3aa0b2..118b6092a9 100644
--- a/src/spikeinterface/core/tests/test_channelsaggregationrecording.py
+++ b/src/spikeinterface/core/tests/test_channelsaggregationrecording.py
@@ -23,7 +23,6 @@ def test_channelsaggregationrecording():
 
     # test num channels
     recording_agg = aggregate_channels([recording1, recording2, recording3])
-    print(recording_agg)
     assert len(recording_agg.get_channel_ids()) == 3 * num_channels
 
     assert np.allclose(recording_agg.get_times(0), recording1.get_times(0))
@@ -37,21 +36,21 @@ def test_channelsaggregationrecording():
         traces2_0 = recording2.get_traces(channel_ids=[channel_ids[0]], segment_index=seg)
         traces3_2 = recording3.get_traces(channel_ids=[channel_ids[2]], segment_index=seg)
 
-        assert np.allclose(traces1_1, recording_agg.get_traces(channel_ids=[channel_ids[1]], segment_index=seg))
+        assert np.allclose(traces1_1, recording_agg.get_traces(channel_ids=[str(channel_ids[1])], segment_index=seg))
         assert np.allclose(
-            traces2_0, recording_agg.get_traces(channel_ids=[num_channels + channel_ids[0]], segment_index=seg)
+            traces2_0, recording_agg.get_traces(channel_ids=[str(num_channels + channel_ids[0])], segment_index=seg)
         )
         assert np.allclose(
-            traces3_2, recording_agg.get_traces(channel_ids=[2 * num_channels + channel_ids[2]], segment_index=seg)
+            traces3_2, recording_agg.get_traces(channel_ids=[str(2 * num_channels + channel_ids[2])], segment_index=seg)
         )
         # all traces
         traces1 = recording1.get_traces(segment_index=seg)
         traces2 = recording2.get_traces(segment_index=seg)
         traces3 = recording3.get_traces(segment_index=seg)
 
-        assert np.allclose(traces1, recording_agg.get_traces(channel_ids=[0, 1, 2], segment_index=seg))
-        assert np.allclose(traces2, recording_agg.get_traces(channel_ids=[3, 4, 5], segment_index=seg))
-        assert np.allclose(traces3, recording_agg.get_traces(channel_ids=[6, 7, 8], segment_index=seg))
+        assert np.allclose(traces1, recording_agg.get_traces(channel_ids=["0", "1", "2"], segment_index=seg))
+        assert np.allclose(traces2, recording_agg.get_traces(channel_ids=["3", "4", "5"], segment_index=seg))
+        assert np.allclose(traces3, recording_agg.get_traces(channel_ids=["6", "7", "8"], segment_index=seg))
 
     # test rename channels
     renamed_channel_ids = [f"#Channel {i}" for i in range(3 * num_channels)]
@@ -81,5 +80,41 @@ def test_channelsaggregationrecording():
     print(recording_agg_prop.get_property("brain_area"))
 
 
+def test_channel_aggregation_preserve_ids():
+
+    recording1 = generate_recording(num_channels=3, durations=[10], set_probe=False)  # To avoid location check
+    recording1 = recording1.rename_channels(new_channel_ids=["a", "b", "c"])
+    recording2 = generate_recording(num_channels=2, durations=[10], set_probe=False)
+    recording2 = recording2.rename_channels(new_channel_ids=["d", "e"])
+
+    aggregated_recording = aggregate_channels([recording1, recording2])
+    assert aggregated_recording.get_num_channels() == 5
+    assert list(aggregated_recording.get_channel_ids()) == ["a", "b", "c", "d", "e"]
+
+
+def test_channel_aggregation_does_not_preserve_ids_if_not_unique():
+
+    recording1 = generate_recording(num_channels=3, durations=[10], set_probe=False)  # To avoid location check
+    recording1 = recording1.rename_channels(new_channel_ids=["a", "b", "c"])
+    recording2 = generate_recording(num_channels=2, durations=[10], set_probe=False)
+    recording2 = recording2.rename_channels(new_channel_ids=["a", "b"])
+
+    aggregated_recording = aggregate_channels([recording1, recording2])
+    assert aggregated_recording.get_num_channels() == 5
+    assert list(aggregated_recording.get_channel_ids()) == ["0", "1", "2", "3", "4"]
+
+
+def test_channel_aggregation_does_not_preserve_ids_not_the_same_type():
+
+    recording1 = generate_recording(num_channels=3, durations=[10], set_probe=False)  # To avoid location check
+    recording1 = recording1.rename_channels(new_channel_ids=["a", "b", "c"])
+    recording2 = generate_recording(num_channels=2, durations=[10], set_probe=False)
+    recording2 = recording2.rename_channels(new_channel_ids=[1, 2])
+
+    aggregated_recording = aggregate_channels([recording1, recording2])
+    assert aggregated_recording.get_num_channels() == 5
+    assert list(aggregated_recording.get_channel_ids()) == ["0", "1", "2", "3", "4"]
+
+
 if __name__ == "__main__":
     test_channelsaggregationrecording()
diff --git a/src/spikeinterface/core/tests/test_template_tools.py b/src/spikeinterface/core/tests/test_template_tools.py
index f79c830db6..6ef8267742 100644
--- a/src/spikeinterface/core/tests/test_template_tools.py
+++ b/src/spikeinterface/core/tests/test_template_tools.py
@@ -47,6 +47,7 @@ def _get_templates_object_from_sorting_analyzer(sorting_analyzer):
         sparsity_mask=None,
         channel_ids=sorting_analyzer.channel_ids,
         unit_ids=sorting_analyzer.unit_ids,
+        is_scaled=sorting_analyzer.return_scaled,
     )
     return templates
 
diff --git a/src/spikeinterface/extractors/neoextractors/spikegadgets.py b/src/spikeinterface/extractors/neoextractors/spikegadgets.py
index e835edf961..7d6b492325 100644
--- a/src/spikeinterface/extractors/neoextractors/spikegadgets.py
+++ b/src/spikeinterface/extractors/neoextractors/spikegadgets.py
@@ -1,9 +1,10 @@
 from __future__ import annotations
-
 from pathlib import Path
 
-import probeinterface
+import packaging
 
+import packaging.version
+import probeinterface
 from spikeinterface.core.core_tools import define_function_from_class
 
 from .neobaseextractor import NeoBaseRecordingExtractor
@@ -38,7 +39,9 @@ def __init__(self, file_path, stream_id=None, stream_name=None, block_index=None
         )
         self._kwargs.update(dict(file_path=str(Path(file_path).absolute()), stream_id=stream_id))
 
-        probegroup = probeinterface.read_spikegadgets(file_path, raise_error=False)
+        probegroup = None  # TODO remove once probeinterface is updated to 0.2.22 in the pyproject.toml
+        if packaging.version.parse(probeinterface.__version__) > packaging.version.parse("0.2.21"):
+            probegroup = probeinterface.read_spikegadgets(file_path, raise_error=False)
 
         if probegroup is not None:
             self.set_probes(probegroup, in_place=True)
diff --git a/src/spikeinterface/generation/drifting_generator.py b/src/spikeinterface/generation/drifting_generator.py
index 8a658cd97d..7f617c3ade 100644
--- a/src/spikeinterface/generation/drifting_generator.py
+++ b/src/spikeinterface/generation/drifting_generator.py
@@ -404,6 +404,7 @@ def generate_drifting_recording(
         sampling_frequency=sampling_frequency,
         nbefore=nbefore,
         probe=probe,
+        is_scaled=True,
     )
 
     drifting_templates = DriftingTemplates.from_static(templates)
diff --git a/src/spikeinterface/generation/tests/test_drift_tools.py b/src/spikeinterface/generation/tests/test_drift_tools.py
index ab03b30d82..e64e64ffda 100644
--- a/src/spikeinterface/generation/tests/test_drift_tools.py
+++ b/src/spikeinterface/generation/tests/test_drift_tools.py
@@ -73,6 +73,7 @@ def make_some_templates():
         sampling_frequency=sampling_frequency,
         nbefore=nbefore,
         probe=probe,
+        is_scaled=True,
     )
 
     return templates
diff --git a/src/spikeinterface/sorters/internal/spyking_circus2.py b/src/spikeinterface/sorters/internal/spyking_circus2.py
index ba6870eef2..6575aba15e 100644
--- a/src/spikeinterface/sorters/internal/spyking_circus2.py
+++ b/src/spikeinterface/sorters/internal/spyking_circus2.py
@@ -1,4 +1,5 @@
 from __future__ import annotations
+from operator import is_
 
 from .si_based import ComponentsBasedSorter
 
@@ -250,13 +251,14 @@ def _run_from_folder(cls, sorter_output_folder, params, verbose):
             )
 
             templates = Templates(
-                templates_array,
-                sampling_frequency,
-                nbefore,
-                None,
-                recording_w.channel_ids,
-                unit_ids,
-                recording_w.get_probe(),
+                templates_array=templates_array,
+                sampling_frequency=sampling_frequency,
+                nbefore=nbefore,
+                sparsity_mask=None,
+                channel_ids=recording_w.channel_ids,
+                unit_ids=unit_ids,
+                probe=recording_w.get_probe(),
+                is_scaled=False,
             )
 
             sparsity = compute_sparsity(templates, noise_levels, **params["sparsity"])
diff --git a/src/spikeinterface/sorters/internal/tridesclous2.py b/src/spikeinterface/sorters/internal/tridesclous2.py
index 6ac4d63e7e..c47cbb376d 100644
--- a/src/spikeinterface/sorters/internal/tridesclous2.py
+++ b/src/spikeinterface/sorters/internal/tridesclous2.py
@@ -220,7 +220,9 @@ def _run_from_folder(cls, sorter_output_folder, params, verbose):
             templates_array=templates_array,
             sampling_frequency=sampling_frequency,
             nbefore=nbefore,
+            sparsity_mask=None,
             probe=recording_for_peeler.get_probe(),
+            is_scaled=False,
         )
 
         # TODO : try other methods for sparsity
diff --git a/src/spikeinterface/sortingcomponents/benchmark/tests/common_benchmark_testing.py b/src/spikeinterface/sortingcomponents/benchmark/tests/common_benchmark_testing.py
index 3401e36dd0..313f19537e 100644
--- a/src/spikeinterface/sortingcomponents/benchmark/tests/common_benchmark_testing.py
+++ b/src/spikeinterface/sortingcomponents/benchmark/tests/common_benchmark_testing.py
@@ -77,6 +77,7 @@ def compute_gt_templates(recording, gt_sorting, ms_before=2.0, ms_after=3.0, ret
         channel_ids=recording.channel_ids,
         unit_ids=gt_sorting.unit_ids,
         probe=recording.get_probe(),
+        is_scaled=return_scaled,
     )
     return gt_templates
 
diff --git a/src/spikeinterface/sortingcomponents/clustering/circus.py b/src/spikeinterface/sortingcomponents/clustering/circus.py
index 4135bd4b6e..ce7a78e4c6 100644
--- a/src/spikeinterface/sortingcomponents/clustering/circus.py
+++ b/src/spikeinterface/sortingcomponents/clustering/circus.py
@@ -226,7 +226,14 @@ def main_function(cls, recording, peaks, params):
         )
 
         templates = Templates(
-            templates_array, fs, nbefore, None, recording.channel_ids, unit_ids, recording.get_probe()
+            templates_array=templates_array,
+            sampling_frequency=fs,
+            nbefore=nbefore,
+            sparsity_mask=None,
+            channel_ids=recording.channel_ids,
+            unit_ids=unit_ids,
+            probe=recording.get_probe(),
+            is_scaled=False,
         )
         if params["noise_levels"] is None:
             params["noise_levels"] = get_noise_levels(recording, return_scaled=False)
diff --git a/src/spikeinterface/sortingcomponents/clustering/position_and_features.py b/src/spikeinterface/sortingcomponents/clustering/position_and_features.py
index d24af3c175..a07a6140e1 100644
--- a/src/spikeinterface/sortingcomponents/clustering/position_and_features.py
+++ b/src/spikeinterface/sortingcomponents/clustering/position_and_features.py
@@ -184,7 +184,12 @@ def main_function(cls, recording, peaks, params):
                 **params["job_kwargs"],
             )
             templates = Templates(
-                templates_array=templates_array, sampling_frequency=fs, nbefore=nbefore, probe=recording.get_probe()
+                templates_array=templates_array,
+                sampling_frequency=fs,
+                nbefore=nbefore,
+                sparsity_mask=None,
+                probe=recording.get_probe(),
+                is_scaled=False,
             )
 
             labels, peak_labels = remove_duplicates_via_matching(
diff --git a/src/spikeinterface/sortingcomponents/clustering/random_projections.py b/src/spikeinterface/sortingcomponents/clustering/random_projections.py
index efd63be55f..6c1ad75383 100644
--- a/src/spikeinterface/sortingcomponents/clustering/random_projections.py
+++ b/src/spikeinterface/sortingcomponents/clustering/random_projections.py
@@ -137,7 +137,14 @@ def main_function(cls, recording, peaks, params):
         )
 
         templates = Templates(
-            templates_array, fs, nbefore, None, recording.channel_ids, unit_ids, recording.get_probe()
+            templates_array=templates_array,
+            sampling_frequency=fs,
+            nbefore=nbefore,
+            sparsity_mask=None,
+            channel_ids=recording.channel_ids,
+            unit_ids=unit_ids,
+            probe=recording.get_probe(),
+            is_scaled=False,
         )
         if params["noise_levels"] is None:
             params["noise_levels"] = get_noise_levels(recording, return_scaled=False)
diff --git a/src/spikeinterface/sortingcomponents/tools.py b/src/spikeinterface/sortingcomponents/tools.py
index 06dfd994f3..cf0d22c0c8 100644
--- a/src/spikeinterface/sortingcomponents/tools.py
+++ b/src/spikeinterface/sortingcomponents/tools.py
@@ -137,4 +137,5 @@ def remove_empty_templates(templates):
         channel_ids=templates.channel_ids,
         unit_ids=templates.unit_ids[not_empty],
         probe=templates.probe,
+        is_scaled=templates.is_scaled,
     )