My three-month old SnowWolf V1 has gone slightly wonky. When I put in freshly-charged 18650s, the battery display on the screen reads them as only 3/4 full. I use Samsung 25Rs exclusively and have a reliable charger (an Efest LUC 4-bay, among others). With a VOM, all 20 of my 25Rs read 4.2 volts...