To provide a film unit equipped with a lens capable of shortening a charging time, and also, which is provided with a small-sized built-in stroboscopic device.

As a dry battery 41 loaded in a battery holder 42, a battery whose voltage is higher than that of a general alkaline/manganese dry battery(voltage of 1.5 V) is used. As for the dry battery 41, the external size is an IS AA type (R6), and as for the electric characteristics of the dry battery 41, the open circuit voltage is ≥1.65 V and ≤1.85 V, and a closed circuit voltage becomes ≥1.5 V and ≤1.65 V after a lapse of 0.1 second after the start of power supply with a load resistance of 1 Ω.