A trigger lock battery is a specialized power component designed for handheld cordless tools, most notably high-performance vacuum cleaners. It features a mechanical or electronic interlocking mechanism that allows the user to maintain continuous power without having to manually depress the trigger during extended use. This ergonomic design reduces hand fatigue and ensures a consistent flow of energy from the lithium-ion cells to the motor. These batteries are typically high-capacity to support the sustained “always-on” draw, often including LED fuel gauges to monitor remaining runtime.