Check the charge voltage. It should be 14.2 with 13.6 float. I thought mine worked well for six months. I began to notice my batteries going down quicker. Hydrometer confirmed charge state. I installed a digital volt meter that allowed me to easily monitor
charger out put voltage. Charger was returned under warranty and the next two replacements
failed. The last one works but the batteries are not so good and must now be replaced.
I paid return freight on all chargers, each return took 2-3 weeks, bought a cheap
charger to last between returns, had to replace starting battery and this spring I will replace 4 year old t105 bank. This caused a lot of dock