6.5Ah Replacement for Ryobi 40v Battery and Charger Combo Compatible with 40 Volt ryobi Lithium Battery OP4026 OP40601 OP4050A OP4040 OP4030 OP4050 with OP401 40 Volt Charger

What It Is

This is a 6.5Ah aftermarket lithium battery replacement for Ryobi 40V cordless lawn mowers, trimmers, blowers, and other outdoor power equipment. It’s designed to power your tool and work with the Ryobi OP401 40V charger.

Fitment & Compatibility

Before buying, confirm your equipment uses a Ryobi 40V battery system—this battery is not compatible with 18V, 24V, or 36V Ryobi tools. It directly replaces OEM models OP4026, OP40601, OP4050A, OP4040, OP4030, and OP4050. Check the battery slot on your mower or tool: it must accept the standard Ryobi 40V slide-pack shape (approx. 6.5 x 3.5 x 4.5 inches). It will not fit older Ryobi 40V tools with a different battery mount (pre-2015). Verify your charger is the OP401 or an equivalent Ryobi 40V charger; this battery won’t charge on third-party or generic chargers.

Key Things to Know

• Quality: Aftermarket battery; may have slightly shorter lifespan than genuine Ryobi, but 6.5Ah capacity gives longer runtime than standard 4Ah packs.
• Installation: No tools needed. Slide battery onto tool until it clicks. Ensure latch engages fully before use.
• Common gotcha: Some users report the charge indicator LEDs may not work with all Ryobi chargers—test with your OP401 charger first.
• Weight: Heavier than 4Ah packs (~2.5 lbs), which can affect balance on handheld tools like trimmers.

Should You Buy It

If you already own a Ryobi 40V tool and want a high-capacity, budget-friendly spare battery that works with your existing OP401 charger, this is a solid choice. Avoid it if you need OEM reliability for heavy commercial use or if your tool is an older model with a different battery mount.