New Combo: Tenergy TB6-1 Balance Charger for NiMH/NiCD/Li-PO/Li-Fe Battery Packs + Power Supply Optimized operating software that use auto function to set feeding current during charge / discharge. Auto disconnects circuit and alarm once detecting any malfunction - this helps prevent explosion. Programs are controlled through two way linkage and communication, to achieve maximum safety and minimize risk. Have internal independent lithium battery balancer, no need to connect an external balancer for charging. Adaptable to various type of lithium batteries such as Li-ion, LiPo and the new LiFe series. Automatic charge termination when the battery's delta-peak voltage exceeds the threshold. Automatic charging current limit allows you to set upper limit of the charging current when charging your NiCd or NiMH battery. Have capacity limit set up to terminate automatically when your maximum value set is reached. Auto time set up to avoid any possible defect during charge.