Wet monobloc batteries are a type of lead-acid battery that is commonly used for uniterruptible power supplies, telecommunications, and renewable energy systems. Unlike sealed lead-acid batteries, which are sealed and maintenance-free, wet monobloc batteries require regular maintenance and topping up with distilled water. They are called “wet” batteries because they are filled with liquid electrolyte, typically a mixture of slfuric acid and water.

Wet monobloc batteries are known for their reliability and long service life, with typical lifetimes ranging from five to ten years depending on usage patterns and environmental conditions. They are also relatively inexpensive compared to other types of batteries, which makes them a popular choice for backup power applications where cost is a significant factor. They do require regular maintenance, including checks on the electrolyte level and specific gravity, as well as occasional cleaning of the terminals and cables. These are a very popular choice for a wide range of applications, particularly those that require reliable backup power. They are not however suitable for use in applications where they may be exposed to extreme temperatures or where vibration and shock resistance are required.