---
description: What is Cut-off Voltage? Depending on battery type, it refers to the voltage ranges where the charge controller decouples load from battery.
title: What is Cut-off Voltage? - Energy Theory
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# What is Cut-off Voltage?

By [Elliot Clark](https://energytheory.com/author/elliot_clark/)November 17, 20231 Min Read

![JAN 23 What is Cut-off Voltage?](https://energytheory.com/wp-content/uploads/2023/03/Depositphotos_43381413_XL-1024x683.jpg "What is Cut-off Voltage?")

The cut-off voltage refers to the **voltage ranges (activation) where the charge controller decouples the load** or solar array from the battery. The phase is cut off when the charge controller (a voltage and/or current regulator) disconnects the load from the battery, and the voltage is activated. In order for customers to use their batteries to their full potential, the manufacturer establishes the battery’s cut off voltage. This voltage varies from one battery to another and is dependent on the type of battery being used.

### What Happens to Devices With High Cut-Off Voltage?

Devices with overly high cut off voltages **can stop functioning** **even while the battery has a significant amount** of usable capacity. This phenomenon is known as premature voltage cut-off. Devices like laptops, cell phones, medical devices, power tools, [hybrid vehicles](https://afdc.energy.gov/vehicles/how-do-hybrid-electric-cars-work), and other portable devices are some of the gadgets that experience premature voltage cut offs.

### **What are Some Examples of Cut-Off Voltage?**

These are some examples-

- [NiMH or NiCd battery](https://energytheory.com/nicd-vs-nimh-for-solar-lights/)-1.0V
- Single-cell Lithium-ion-3.3V
- Alkaline battery-0.9 V

**Recommended:** [What is Activation Voltage?](https://energytheory.com/what-is-activation-voltage/)

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[Elliot Clark](https://energytheory.com/author/elliot_clark/)

Elliot is a passionate environmentalist and blogger who has dedicated his life to spreading awareness about conservation, green energy, and renewable energy. With a background in environmental science, he has a deep understanding of the issues facing our planet and is committed to educating others on how they can make a difference.

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