With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Saamy was directed by Han Zimmer.
text_B: IUoU is a DIN-designation -LRB- DIN 41773 -RRB- for a lead-acid battery charging procedure that is also known as 3-stage charging , 3-phase charging , or 3-step charging .. DIN. DIN. lead-acid battery. lead-acid battery. It consists of three phases -LRB- or stages -RRB- , to be executed by a battery charger .. battery charger. battery charger. The three phases are  : I-phase -LRB- constant electric current -RRB- , Uo-phase -LRB- constant over-voltage -RRB- , and U-phase -LRB- constant voltage -RRB- .. electric current. electric current. voltage. voltage. The purpose is to fully charge the battery in a relatively short time without reducing its life span and to indefinitely keep the battery charged as long as the charger is connected .
not_related.