Which type of battery is most common for devices requiring small amounts of current over irregular intervals?

The most common type of battery for devices requiring small amounts of current over irregular intervals is the dry cell battery. Dry cell batteries are designed to be portable and can efficiently provide power to low-drain devices such as remote controls, flashlights, and small electronic gadgets. They are characterized by their convenience, safety, and ability to maintain a steady output of voltage over extended periods without the need for maintenance.

The design of dry cells allows them to be used in varying conditions and temperatures, making them ideal for everyday applications where power demands can fluctuate. Their ease of use and widespread availability further solidify their status as the preferred choice for many portable consumer electronics.

In contrast, lead-acid batteries are often used in applications needing higher power outputs, such as starting engines or for backup power systems. Nickel-Cadmium batteries, while capable of providing steady currents, are typically found in applications where rechargeable capabilities are essential. Universal batteries, a broader category that can include various battery types, do not denote a specific battery type suitable for the specified application, making dry cell the best fit for the question's criteria.