How Long Does a Craftsman 20V Battery Last?

The Craftsman Tools 20V lithium-ion batteries represent a major advancement over old batteries.

This article will analyze Craftsman battery specs, lifespan details, and troubleshooting tips. Understanding your battery is key to maximizing the performance of your power tools.


A Craftsman 20V battery lasts 2-8 hours per charge and has a lifespan of 2-3 years or 300-500 charge cycles.

Lithium-Ion Batteries in Craftsman Tools

Craftsman’s lithium-ion (Li-ion) batteries mark a significant upgrade from the older nickel-cadmium models, charging rapidly to keep project momentum. These batteries feature cells with voltages from 1.2 to 3.6 volts, with higher voltages equating to more power and cost.

What distinguishes Craftsman’s Li-ion batteries is their tailored compatibility with Craftsman tools. They’re engineered for seamless communication with the tool motors, optimizing performance and energy efficiency. This precise integration means more effective charging and reliable power for your Craftsman tools.

Craftsman 20V Lithium-Ion Battery: Hours Per Charge and Overall Life Expectancy

Craftsman’s 20V lithium-ion batteries are engineered for longevity, but like all batteries, they have a finite lifespan.

Craftsman 20V batteries will last at least 2 to 3 years or 300 to 500 charge cycles. A charge cycle is a full process of charging the battery to 100% and then using it until it’s completely discharged.

Each charge cycle slightly diminishes the battery’s capacity; over time, this cumulative effect leads to a noticeable decline in performance. Eventually, the battery will reach a point where it can no longer hold a sufficient charge and will need replacement.

If you’re wondering how long your Craftsman 20V battery will last during active use, it depends on several factors, including the tool you’re using and the work’s intensity. The battery can power your tools for anywhere between 2 to 8 hours on a single full charge.

It’s also important to note that Craftsman 20V batteries are available in different capacities: 2.0 Ah and 4.0 Ah. Your choice between these options should depend on your specific needs and the nature of your projects.

Proper care is crucial to ensure you get the most out of your battery. Avoid leaving a fully discharged battery idle for long periods, making recharging more difficult and potentially shortening its lifespan. You can count on reliable performance and an extended service life by maintaining your battery properly.

Do Lithium Ion Batteries Self-Discharge?

Even when not in use, lithium-ion batteries naturally experience self-discharge. This phenomenon occurs when the battery gradually loses charge over time, even if disconnected from any tool.

Manufacturers estimate a self-discharge rate of about 1.5 to 2% per month. However, factors like the ambient temperature and the battery’s current charge level can influence this rate, potentially accelerating the loss of charge during periods of inactivity.

Troubleshooting Craftsman 20V Battery: Charging Issues and Indicator Lights

Even reliable Craftsman 20V batteries can encounter issues like not charging or showing unusual indicator lights.

Here’s a quick guide to resolving these:

Craftsman V20 Battery Not Charging:

  • Ensure the charger is connected to a functional outlet and the battery is properly positioned.
  • Check and clean the battery and charger contacts if necessary.
  • Consider temperature effects; optimal charging occurs between 50°F and 86°F (10°C and 30°C).

Craftsman Battery Charger Red Light:

  • A steady red light means charging is in progress.
  • Blinking red suggests temperature issues or a battery problem. Adjust the environment temperature or consider replacing the battery if blinking persists.

Craftsman 20V Battery Charger Blinking Green:

  • Normally, a blinking green light indicates near completion of charging.
  • Persistent blinking without full charge suggests charger or battery faults. Test with a different battery to diagnose.

Where To Buy?

Amazon usually has a good selection of Craftsman Batteries.

On Sale
CRAFTSMAN V20 Battery, 6.0 Ah, Lithium Ion Battery (CMCB206)
  • V20 6.0Ah High-Capacity Lithium Ion Battery provides up to 4.5x the capacity versus the standard…
  • Extreme runtime for heavy-duty jobsite applications
  • Professional-grade, high-energy cells

Last update on 2024-07-14 / Affiliate links / Images from Amazon Product Advertising API

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