The premium CR 2032 coin cell we ship with this coin cell holder is 200mA and can easily run 1-10 LEDs safely and brightly.
***Solid LEDs need to be separate from any flash or flicker LEDs. Give flash or flicker groups their own coin cell.*** This is not an issue with any of our other power supplies. You can mix solids with flash/flicker using 3 Volt AAA holder or 3 Volt AA holder or 3 Volt wall adapter. available from Evan Designs.