Remove duplicate battery

datasheets/batteries.json

-{
-    "8878-1":{
-        "item number":"8878-1",
-        "item description":"Power Functions Rechargeable Battery Box",
-        "category":"battery",
-        "price [Euro]":55,
-        "mass [g]":83.94,
-        "delivery time [days]":8,
-        "data source":"https://www.bricklink.com/v2/catalog/catalogitem.page?S=8878-1#T=S&O={%22iconly%22:0}",
-        "output voltage [V]":7.4,
-        "dimensions [cm]":"15 x 15 x 3,5"
-    },
-    "8881-1":{
-        "item number":"8881-1",
-        "item description":"Power Functions Battery Box",
-        "category":"battery",
-        "price [Euro]":12,
-        "mass [g]":179.4,
-        "delivery time [days]":3,
-        "data source":"https://www.bricklink.com/v2/catalog/catalogitem.page?S=8881-1#T=S&O={%22iconly%22:0}",
-        "output voltage [V]":9.0,
-        "dimensions [cm]":"8,8 x 6,3 x 3,2"
-    },
-    "88000-1":{
-        "item number":"88000-1",
-        "item description":"Lego AAA Battery Box",
-        "category":"battery",
-        "price [Euro]":30,
-        "mass [g]":97.24,
-        "delivery time [days]":6,
-        "data source":"https://www.brickowl.de/catalog/lego-aaa-battery-box-set-88000",
-        "output voltage [V]":9.0,
-        "dimensions [cm]":"15,3 x 15,1 x 3,9"
-    },
-    "2847c01":{
-        "item number":"2847c01",
-        "item description":"Electric 9V Battery Box",
-        "category":"battery",
-        "price [Euro]":2,
-        "mass [g]":172.7,
-        "delivery time [days]":3,
-        "data source":"https://www.bricklink.com/v2/catalog/catalogitem.page?P=2847c01&name=Electric%209V%20Battery%20Box%204%20x%2014%20x%204%20with%20Red%20Buttons%20and%20Contact%20Plate%20with%20Dark%20Gray%20Base%20(2846%20/%202847c00)&category=%5BElectric,%20Battery%20Box%5D#T=S&O={%22iconly%22:0}",
-        "output voltage [V]":9.0,
-        "dimensions [cm]":"11,2 x 3,2 x 3,2"
-    },
-    "84599":{
-        "item number":84599,
-        "item description":"Electric 9V Power Functions Battery Box (Rechargeable)",
-        "category":"battery",
-        "price [Euro]":120,
-        "mass [g]":82.0,
-        "delivery time [days]":8,
-        "data source":"https://www.bricklink.com/v2/catalog/catalogitem.page?P=84599&name=Electric%209V%20Battery%20Box%20Power%20Functions%20(Rechargeable)%20with%20Dark%20Bluish%20Gray%20Bottom&category=%5BElectric,%20Battery%20Box%5D#T=S&O={%22iconly%22:0}",
-        "output voltage [V]":9.0,
-        "dimensions [cm]":"15 x 15 x 3,5"
-    }
-}
\ No newline at end of file
+{
+    "8878-1":{
+        "item number":"8878-1",
+        "item description":"Power Functions Rechargeable Battery Box",
+        "category":"battery",
+        "price [Euro]":55,
+        "mass [g]":83.94,
+        "delivery time [days]":8,
+        "data source":"https://www.bricklink.com/v2/catalog/catalogitem.page?S=8878-1#T=S&O={%22iconly%22:0}",
+        "output voltage [V]":7.4,
+        "dimensions [cm]":"15 x 15 x 3,5"
+    },
+    "8881-1":{
+        "item number":"8881-1",
+        "item description":"Power Functions Battery Box",
+        "category":"battery",
+        "price [Euro]":12,
+        "mass [g]":179.4,
+        "delivery time [days]":3,
+        "data source":"https://www.bricklink.com/v2/catalog/catalogitem.page?S=8881-1#T=S&O={%22iconly%22:0}",
+        "output voltage [V]":9.0,
+        "dimensions [cm]":"8,8 x 6,3 x 3,2"
+    },
+    "88000-1":{
+        "item number":"88000-1",
+        "item description":"Lego AAA Battery Box",
+        "category":"battery",
+        "price [Euro]":30,
+        "mass [g]":97.24,
+        "delivery time [days]":6,
+        "data source":"https://www.brickowl.de/catalog/lego-aaa-battery-box-set-88000",
+        "output voltage [V]":9.0,
+        "dimensions [cm]":"15,3 x 15,1 x 3,9"
+    },
+    "2847c01":{
+        "item number":"2847c01",
+        "item description":"Electric 9V Battery Box",
+        "category":"battery",
+        "price [Euro]":2,
+        "mass [g]":172.7,
+        "delivery time [days]":3,
+        "data source":"https://www.bricklink.com/v2/catalog/catalogitem.page?P=2847c01&name=Electric%209V%20Battery%20Box%204%20x%2014%20x%204%20with%20Red%20Buttons%20and%20Contact%20Plate%20with%20Dark%20Gray%20Base%20(2846%20/%202847c00)&category=%5BElectric,%20Battery%20Box%5D#T=S&O={%22iconly%22:0}",
+        "output voltage [V]":9.0,
+        "dimensions [cm]":"11,2 x 3,2 x 3,2"
+    },
+}