2-Pack R840085 4.0Ah Li-ion Replacement for Ridgid 18V Battery R840087 R840086 R840083 R840089 AC840085 AC840086 AC840087P AC840089 Compatible with Ridgid Battery Cordless Power Tools

$39.98$63.9938% OFF

Price as of September 6, 2026 at 12:13 AM

TagsWalmart Power Tool Home & Kitchen Lawn & Garden

Longer Runtime With 4.0Ah 2-Pack: Upgraded 18V lithium-ion cells deliver up to 40% more runtime than 2.0Ah packs, so pros and DIYers can finish deck repairs, drywall, and framing without swapping battery mid-job. Wide Compatibility With Ridgid 18V Tools: Drop-in replacement for R840083 R840085 R840086 R840087 R840089 AC840085 AC840086 AC840087P; works with chargers R840091 R840093 R840095 R86092 and all 18V drills, impact drivers, and lights. Built-In BMS + Premium 18650 Cells: Integrated protection against short-circuit, overcharge, over-discharge, overheat, and overload; high-grade 18650 lithium cells with no memory effect — recharge any time without capacity fade. Rugged Job-Site Build: Reinforced ABS shell resists drop impact, dust, and moisture; engineered for construction, HVAC, plumbing, automotive repair, and outdoor work across all four seasons and temperature ranges. 12-Month Warranty + CE FCC RoHS Certified: Every 4.0Ah pack passes 3-stage QC before shipping; backed by Ferryboat 12-month replacement warranty and responsive customer support — buy with confidence.