Good News for all you YS-D1 digital strobe owners out there! Sea & Sea just released new firmware that updates the low battery level indicator feature and functionality. If your serial number is below 104102102 or between 104102251-104102552 than you should contact your authorized Sea & Sea dealer for a factory update.
Finding your Serial number
To find your serial number and check whether you need the firmware update, look for a printed lable inside the battery comparment, just near the top.
The Firmware update will be expedited and completed within 7-10 business days upon recepit at the service center so get those strobes over and upgraded before your next dive trip!