Biswaye 40V 6Ah Lithium Battery Replacement for Ryobi 40V Battery OP4040 OP40601 OP4026 OP40261 OP40401 OP40501 OP4015 OP40602 OP40404 OP40603 Compatible with Ryobi 40 Volt Cordless Power Tools

What It Is

This is a 40V, 6Ah lithium-ion replacement battery for Ryobi 40V cordless tools—lawn mowers, trimmers, blowers, chainsaws, and more. It powers the tool but doesn’t include a charger.

Fitment & Compatibility

• Compatible Ryobi models: OP4040, OP40601, OP4026, OP40261, OP40401, OP40501, OP4015, OP40602, OP40404, OP40603. Fits all Ryobi 40V tools with the standard slide-on battery mount.
• Check before buying: Ensure your tool uses a 40V battery (not 18V). Measure the battery slot: this unit is 5.5” x 3.5” x 4.5”. It will not fit Ryobi 18V tools or older 40V designs with a different latch system.
• OEM vs aftermarket: This is a third-party replacement, not Ryobi OEM. It may not charge in Ryobi’s 40V rapid charger (OPC40601) or older 40V chargers—test compatibility if you own a non-standard charger.

Key Things to Know

• Quality: 6Ah capacity is higher than Ryobi’s standard 4Ah or 5Ah packs, giving longer runtime. Some users report slightly shorter life than OEM after 6–12 months.
• Installation: Slide onto tool until it clicks—no tools needed. Ensure the latch engages fully to avoid disconnection during use.
• Common gotchas: Won’t work with Ryobi’s 40V rapid charger (model OPC40601) for some users; try a standard 40V charger first. Battery indicator lights may be less accurate than OEM.
• Weight: Heavier than a 4Ah pack (~2.5 lbs)—may affect balance on handheld tools like trimmers.

Should You Buy It

Buy this if you need a budget-friendly, high-capacity spare for multiple Ryobi 40V tools and already own a compatible charger. Skip it if you rely on Ryobi’s rapid charger, need OEM reliability for daily heavy use, or want a warranty longer than 30 days.