BatPower 2-Pack 6.5Ah 40V Replacement Battery and Charger Starter Kit Compatible with Ryobi 40V Tools, 2 High Capacity Lithium-Ion Batteries and 1 Charger OP4050A OP401 (3-Piece Set)

What It Is

This 3-piece set includes two 6.5Ah 40V lithium-ion batteries and one rapid charger, designed to power Ryobi 40V cordless lawn mowers, trimmers, blowers, and other outdoor tools that use the same battery platform.

Fitment & Compatibility

• Brand check: Works with any Ryobi 40V tool (mowers, chainsaws, string trimmers, etc.) that accepts the standard Ryobi 40V slide-on battery.
• OEM vs aftermarket: This is an aftermarket replacement (not Ryobi OEM). It is compatible with Ryobi models OP4050A, OP401, and all 40V tools using the same battery interface.
• Physical fit: Batteries measure roughly 5.5 x 4 x 3.5 inches—identical to Ryobi OEM 40V batteries. They slide onto the tool’s battery mount without modification.
• Charger compatibility: The included charger works only with 40V Ryobi-style batteries. Do not use with 18V or other voltage tools.
• What to check: Verify your tool’s voltage requirement is 40V (not 18V). Confirm the battery slot is the standard slide-on type (not the older push-in style). If you have a Ryobi 40V mower with a battery cover, ensure the cover closes fully with these slightly taller cells (they fit, but double-check clearance).

Key Things to Know

• Quality & performance: 6.5Ah capacity is higher than Ryobi’s standard 4.0Ah or 5.0Ah batteries, offering longer run time per charge. Cells are lithium-ion, with built-in overcharge and short-circuit protection.
• Installation: No tools required. Slide battery onto tool until it clicks, then press the release button to remove. Charger plugs into any standard wall outlet.
• Common gotchas: Aftermarket batteries may not communicate with Ryobi’s onboard fuel gauge on some tools—you may see no battery level indicator. Also, some users report slightly shorter lifespan than OEM Ryobi batteries (typically 300-500 charge cycles vs 500-800).
• Weight: Each 6.5Ah battery weighs about 1.8 lbs, slightly heavier than a 4.0Ah battery, which may affect balance on handheld tools.

Should You Buy It

Buy this if you need reliable, high-capacity 40V batteries for Ryobi tools and want to save roughly 30-40% compared to buying two OEM Ryobi 6.0Ah batteries and a charger separately. It’s ideal for homeowners with multiple 40V tools who want extended run time without the OEM markup. Skip it if you need precise battery fuel gauge readings or if your tool is still under warranty and you prefer to keep it strictly OEM.