I purchased a Klarus G20L in May of 2020. I really like the light. Just thus past week it died on a walk, even though it showed fully charged. I re-charged it and it worked for a few minutes then died again. When it was on the charger, the yellow light blinked 3 or 4 times, then blinked green once. It kept repeating that sequence. Has anyone else had similar problems? Do I just have to contact Klarus directly?