FDNY CoF Cleaning and Testing Smoke Detectors (F-78) Practice Test 2026 - Free F-78 Exam Practice Questions and Study Guide

Most smoke detectors are designed to operate effectively with standard alkaline batteries. These batteries are commonly used because they provide a stable and reliable power source, which is essential for the consistent performance of smoke detectors. Standard alkaline batteries are widely available, cost-effective, and possess a good shelf life, making them an ideal choice for households and businesses alike.

In comparison, while rechargeable lithium batteries can also be used in some detectors, they are not as universally applicable as alkaline batteries. Non-replaceable batteries may not offer the convenience needed for regular maintenance, as they cannot be replaced once exhausted. Lead-acid batteries, on the other hand, are typically used in larger fire alarm systems rather than individual smoke detectors, as they are bulkier and not suitable for everyday household smoke detectors.