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Battery and charger troubleshooting quick guide

Most battery issues are a depleted battery, an unpowered or out-of-range charger, or an end-of-life pack. The charger LED tells you which: solid red is charging, solid green is full, blinking red is too hot.

Updated June 3, 2026

Applies to:

All FGI battery-powered sprayers using lithium-ion packs (DEWALT 20V, CRAFTSMAN, Smith, Scotts, LESCO, and equivalent).

What causes this:

Battery and charger problems usually come down to a depleted battery, a charger with no power, an out-of-range temperature, a damaged charger, a pack too hot to charge, or an end-of-life battery that can no longer hold a charge.

How to fix it:

  1. Plug the charger into a known-working outlet and confirm the outlet has power.
  2. Insert the battery firmly until the indicator light comes on.
  3. Read the LED: solid red means charging, solid green means fully charged, blinking red means the battery is too hot to charge safely.
  4. If the red light keeps blinking, move the battery somewhere between 40 and 104 degrees F and let it cool about 30 minutes before retrying.
  5. If red and green alternate, the battery has reached end of life and must be replaced.
  6. If no lights come on at a working outlet, the charger has failed and should be replaced.
  7. To order a replacement battery or charger, or to start a warranty claim, call 1-800-311-9903.

Still stuck? Call us at 1-800-311-9903 or send a message. Monday to Friday, 8AM to 5PM EST.