LR1130 button batteries
Used in our Battery powered candles. You may have other equipment that uses these.
Cheap enough to re use electric items by changing batteries. Maybe use your tester to find out when a change needs to be done.
Do not let these get eaten. They can be very dangerous if swallowed.
We will need to get more imported.
Also we may have the thicker LR44 which you could ask to be given instead.
Only available in store at moment. We need to test these to see if it has charge.