Okay so I have a PO-35 which I have owned for around 6-7 years now. For some reason it drains the batteries extremely fast, with the screen turning off within 24 hours. I am using 1.2V rechargeables and when I check their voltage they are at under 0.6V after the screen turns off. Why is this happening and is there a way to fix this?

Sorry, you need to contact Teenage Engineering support regarding hardware problems with your Pocket Operator.