Mental Dice – What type of battery do you use?

We use Panasonic 16/32 batteries, selected for their much longer life than a rechargeable battery. The rechargeable battery, after a certain number of “recharge-discharge” cycles will lose its power and will have to be replaced, that’s why we preferred Panasonic batteries. Especially since the dice are designed so that they only activate for a few milliseconds at the moment it rotates 45°, so the use of the battery is only a few seconds and the display shows the battery status at each start up, so there is no risk of failure. The longevity is assured at 5 or 6 years and the cost of an exchange will be about 40 USD per Dice.