This CR2025 battery is 2.5mm thick with a diameter of 20mm. The battery has a capacity of 170mAh with a voltage of 3V. https://elecena.pl/product/27741724/varta-cr2025-buttoncell-3v-170mah 2025-01-23 https://elecena.pl/product/27741724/varta-cr2025-buttoncell-3v-170mah 2025-04-20