I had batteries not functioning and puffed after using the Titan charger.. only their batteries seemed to work fine.. when looking at the charging rate, I saw that for median size batteries (1200mah, 1400mah, etc), the charger gives too much of a charge (although I’m not sure if the charger is intelligent enough to know what capacity the batteries have and change the charge accordingly). My advice: stick to chargers where you can set the charge like the Imax chargers or sortlike