For traffic lanterns, emergency lighting and several types of industrial equipment, this 6V battery configuration is one of the most common. Interestingly, although this battery style is still widely used, it hasn't been widely developed in the modern, longer-lasting and rechargeable technologies. That being the case, when you need replacements, the main factors to consider are quality and cost. This battery is from Varta, a true pioneer in the portable power industry, with over 125 years of history in manufacturing batteries and a leader in the European market. With that kind of expertise, you can expect the highest quality, even in a low-cost, single-use battery such as this one.
The zinc-carbon composition of this cell is one of the oldest and among the least expensive dry cell technologies, making it a simple choice when the price to the consumer is a primary concern. It also has certain advantages over some of the more recent technologies, not the least of which is less environmental impact than compositions that use toxins like mercury or cadmium. This plastic-encased battery is less prone to leakage and moisture absorption which can cause corrosion and damage to equipment. It fits any device designed to accommodate the squared package and dual, top-mounted spring contacts.
Advances in technology have provided more efficient devices that use these cells for power. Lantern torches with multiple high-output LEDs, for instance, consume less power than those with incandescent lamps and, therefore, demand less from their batteries. That makes an inexpensive power cell a viable option for these devices, especially in applications where usage is infrequent. These low-cost 6V batteries are also a simple power supply for many electronics hobby projects and this type of cell is commonly used as a backup supply for industrial equipment. Don't pay more than you should for a high-quality, single-use battery for any of these applications.