A PAIR of genuine RENATA CR2325 batteries (recommended by L&B) for devices such as;
For devices such as the VISO; After battery replacement, reset the device, the battery system requires 2 minutes to calibrate itself before displaying the correct status. While calibrating, the battery icon toggles between full and low.
To reset the device; Using a paperclip, insert it into the small hole at the rear of the device. Press and release to initiate a reset.