Battery pack and vehicle

According to one embodiment, a battery module (100) including two nonaqueous electrolyte batteries electrically (101), (102) connected in series is provided. Each of the nonaqueous electrolyte batteries (101), (102) includes a positive electrode (3), a negative electrode (4), and a nonaqueous electrolyte. The positive electrode (3) contains an iron-containing phosphorus compound represented by Li x Fe 1-y Mn y A z PO 4 and having an olivine structure, wherein A is at least one element selected from the group consisting of V, Mg, Ni, Al, Sn, Zr, and Nb, and 0 ¤ x ¤ 1.1, 0 ¤ y ¤ 0.2, and 0 ¤ z ¤ 0.2 are set. The negative electrode (4) contains a titanium-containing oxide. The battery module (100) has a charge maximum voltage in a range of 4 V to 5 V.