RIDGID 18V 4.0Ah Lithium-Ion Battery — 3x Runtime, Compact & Compatible

Overview

The RIDGID 18V Lithium-Ion 4.0 Ah Battery is built to extend your on-site power without adding bulk. It delivers up to three times the runtime of the base 1.5 Ah battery, so you can complete more tasks between charges while maintaining consistent performance.

Compact design and handling

Designed for comfort, this 4.0 Ah pack is about 10% more compact and 10% lighter than the prior model. The smaller size helps you keep a balanced grip and reduces fatigue during long sessions, whether you're framing, decking, or finishing work.

Power on the job

The 18-volt system remains fully compatible with all RIDGID 18V tools and chargers, so you can mix and match with confidence. A built-in fuel gauge shows the current power level, helping you plan when to swap or recharge without interrupting your workflow.

When you register your RIDGID 4.0 Ah battery, you gain access to the RIDGID Lifetime Service Agreement, reflecting the brand's commitment to long-term reliability. Note that this particular battery is sold with an operator's manual and charger is sold separately. Additionally, the product features a note that it is not eligible for the Lifetime Service Agreement in certain configurations.

What’s in the box and how it fits your process

• One AC87004 18V Lithium-Ion 4.0 Ah battery
• Operator's manual included
• Charger sold separately
• Not eligible for the Lifetime Service Agreement

Specs at a glance

• Voltage: 18 V
• Capacity: 4.0 Ah
• Recharge time: around 60 minutes
• Product size: 4 in H x 5 in L x 3 in W
• Weight: compact design to reduce user fatigue