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Platform-fit-first product sorting

Last source & offer review July 13, 2026

Ryobi

OP4040 + OP403A

No current Amazon offer

Buying link unavailable while we re-verify this exact listing (checked 2026-07-13).

Weighing a cheaper aftermarket pack? Read our honest genuine vs aftermarket batteries guide first.Read the guide →

The Verdict

A genuine Ryobi 40V battery-and-charger bundle, but its Amazon listing could not be verified on 2026-10-06 (Creators API: ItemNotAccessible). BatteryFits archives the identity without a buying exit until a current offer can be confirmed.

Best for:

High-Output & Heavy ToolsMax RuntimeGenuine OEM

Pros & Cons

Pros

Bundles a 4.0Ah 40V battery (OP4040) with a charger (OP403A) in one genuine Ryobi kit
4.0Ah is a mid-to-high capacity pack for the 40V outdoor-power platform
Genuine Ryobi OEM parts, not aftermarket

Cons

Only one battery included — no second pack for hot-swapping on longer yard jobs
40V packs are heavier than ONE+ 18V packs, worth weighing if you're carrying it around
We haven't independently timed a charge or measured runtime; 4.0Ah is Ryobi's stated rating

At a Glance

40VPlatform

40V MAXVoltage

4 AhCapacity

kitType

YesGenuine OEM

Ryobi 40V Battery and Charger Kit, 4.0 Ah Lithium-Ion Battery Set OEM OP4040 + OP403A

Buying link unavailable while we re-verify this exact listing (checked 2026-07-13).

No current Amazon offer · Last checked 2026-07-13

My Verdict

How we picked this

We do not bench-test individual cells and never claim runtime numbers we did not measure. Picks are sorted by platform fit, genuine-OEM vs aftermarket risk, stated capacity, and live Amazon availability. Compatibility is not a safety endorsement — always verify voltage and platform for your exact tool.

See our full methodology →

Ryobi 40V Battery and Charger Kit, 4.0 Ah Lithium-Ion Battery Set OEM OP4040 + OP403A

No current Amazon offer

Buying link unavailable while we re-verify this exact listing (checked 2026-07-13).

No current Amazon offer · Last checked 2026-07-13

Full Specifications
Platform	40V
Voltage	40V MAX
Capacity	4Ah
Type	kit
Genuine OEM	Yes
Fuel Gauge	Yes
Warranty	3years

Head-to-Head Comparisons

Ryobi 40V Battery and Charger Kit, 4.0 Ah Lithium-Ion Battery Set OEM OP4040 + OP403A

No current Amazon offer

Buying link unavailable while we re-verify this exact listing (checked 2026-07-13).

No current Amazon offer · Last checked 2026-07-13