At long last, we've updated our video on how to change the battery of your 3rd generation Tilt hydrometer (V3). This is the Tilt we have been shipping since mid-2018 and continue to ship as of 2021. To change the battery you will need a pair of rubber gloves or our "Tilt Wrench" to remove the cap, a new CR123A battery (Streamlight, Energizer, Panasonic, or other brand with approximate weight of 16.1-16.5g). Video also shows how to calibrate by floating in water after changing the battery. Enjoy!