Main board battery 2032 Lithium 3V Lithium, fast delivery, reasonable price. A helpful for other customers Review I can not give at present; Use these batteries in a blood glucose meter, for about 1 week announced the device, battery too weak. This was repeated 3 times (each new batteries from the same delivery eingesetzt- 2Stck-) The equipment has been replaced by the manufacturer free of charge and has been running for five weeks without difficulty with the batteries supplied by the manufacturer. Information from the manufacturer, it was not a defect of the returned unit will be detected. When these batteries are dead, I will try again with the other existing batteries.