RYOBI 40V Replacement Battery Charger OP404 — Compact OEM 40‑Volt Charger, Fast Safe Charging

RYOBI's OP404 is a compact OEM 40-volt lithium-ion battery charger designed to recharge your RYOBI 40V batteries quickly and safely while saving space in your workshop or garage.

Designed as a direct replacement for RYOBI 40V systems, this OP404 charger restores power to compatible lithium-ion battery packs with a compact footprint and plug-and-play convenience. It matches the specifications of original equipment, so you get consistent charging performance and electrical compatibility without needing to modify tools or batteries. Built to the manufacturer's standards, it supports routine charging tasks for homeowners and pros who rely on RYOBI cordless tools.

How fast will the OP404 recharge my 40V battery?

The OP404 is optimized for typical RYOBI 40V lithium-ion packs, bringing them back to usable charge in a timeframe comparable to original RYOBI chargers. Actual charge times vary by battery capacity and remaining charge, but the unit balances speed with battery longevity to prevent excessive heat or stress.

• Designed for RYOBI 40V lithium-ion battery chemistry
• Charge-time depends on battery amp-hour rating and state of discharge
• Built-in regulation prevents overcharging and reduces heat buildup

Will this OP404 charger work with my existing RYOBI batteries?

Yes — the OP404 is intended as an OEM replacement for RYOBI 40V battery packs. It connects to batteries made for the 40-volt lineup without adapters, providing a seamless swap for lost, damaged, or aging chargers.

• Direct plug-and-play compatibility with RYOBI 40V batteries
• No tool or battery modifications required
• Ideal as a spare charger for multiple job sites or vehicles

What safety and durability features does this charger include?

The OP404 incorporates common safety protections expected from OEM chargers to protect batteries and users during routine charging. While not a medical or performance guarantee, these measures help maintain battery health and reduce risk during normal use.

• Electrical regulation to help prevent overcharge
• Thermal considerations to limit excessive temperature rise
• Rugged casing suitable for garage or job-site environments

How portable is the OP404 for storage and travel?

The charger’s compact design makes it easy to tuck into a tool bag, hang on a pegboard, or keep in a vehicle for on-the-go charging. Its small footprint leaves room for other accessories and reduces clutter in workspaces where multiple chargers are stored.

• Compact footprint for easy storage and transport
• Lightweight housing suited for jobsite mobility
• Standard cord length for versatile placement near outlets

Who is this for: Homeowners, landscapers, and contractors who already use RYOBI 40V tools and need a reliable replacement or secondary charger will find the OP404 a practical choice. It’s especially useful if you want the confidence of OEM compatibility, a space-saving charger for small work areas, or an extra unit to keep batteries charged across multiple sites. Note that this product is a charger only; batteries and tools are sold separately. Check battery model compatibility with RYOBI 40V packs before purchase to ensure fit and performance.