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40v 2.5 Ah Lithium Battery

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A powerful, fade-free 40v battery that delivers 2X the power** and run time*

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RYOBI OP4020A at $99 Save 39%

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Product Overview

The ATLAS™ 40v battery platform performs better than gas - no dangerous fumes, no gas and oil mixing, no engine maintenance. The 40v battery delivers 2X the power and runtime. Designed for rapid charging, this battery has a built-in fuel gauge that displays remaining power.

  • Powers all ATLAS™ 40v tools
  • Fuel gauge displays state of charge
  • Rapid charge time
  • Industry leading quality Li-ion battery cells individually balanced and tested to meet the highest performance requirements
  • Thermal control extends life and runtime by minimizing heat
  • Impact resistance prevents failure from drops and vibration

Important Information

  • Battery only, requires ATLAS™ 40/80v Dual Voltage Battery Charger or Rapid Charger, sold separately. * Compared to BAUER 20v battery, **compared to standard 20v outdoor power equipment


Battery capacity
2.5 Ah
Battery type
Lithium Ion
Battery voltage (volts)
Charge time
30 minute rapid charge time
Shipping Weight
1.71 lb.
Note: Specifications are approximate and subject to change


We guarantee this product to be free from defects in materials and workmanship 90 days from the date of purchase. Limitations apply.