Tekins 1,3,5 LED are on. Reason Cutoff voltage set too low 6v. 6v meaning Lipo 2s 3v per cell...is too low. To remedy this LED6, Custom mode. To get into Custom, you need to have the Hotwire Interface. Set up Voltage cut off to 6.2 or 6.4v. 6.4v will allow 3.2v volts per cell.

6v for 2S lipos in time the minimum voltage. You are better off with 6.4v. Your model will glitch telling your lipos low, where you suppose to stop. Lipo will give an Low voltage error on charger preventing you to charge.

Time will tell Lipos get weaker. Balance the lipo periodically may extend the life.