I'm afraid I still don't have a multimeter, but I have tested the batteries in a range of devices and they are working. Still no response from the Puck though.
I attempted to runt the puck 1v91 firware update via nRF toolbox and got a notification saying the upload failed. Now the Puck won't seem to switch on. I can't get the red LED for a soft reset or the green LED.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I'm afraid I still don't have a multimeter, but I have tested the batteries in a range of devices and they are working. Still no response from the Puck though.