Ryobi Mower Batteries: 40V Replacement Packs Compared

Best for
Single high-capacity spare for a 40V mower

The 1 Pack 7500mAh OP4075A Battery Replacement from Fhybat is a 40V, 7.5Ah lithium-ion pack styled after Ryobi’s OP4075A. Its compatibility list is broad, covering OP4075A, OP40601, OP40602, OP4060A, OP4040, OP4050, OP4015, OP4026, OP4030 and their variants. The seller says it works with Ryobi 40V mowers, trimmers and blowers and with chargers OP401, OP403 and OP404.

A 4-LED gauge on the battery shows remaining charge, and the listing claims six protections: short-circuit, over-charge, over-discharge, over-temperature, over-current and over-voltage. It is described as the same size and function as the original pack, and carries a one-year warranty.

It suits owners who already have a working charger and want one high-capacity spare. As an alternative to the Ryobi 40V 7.5Ah battery, it gives the most capacity per single pack here. If your charger is dead too, choose one of the kits.

• 40V, 7.5Ah lithium-ion
• 4-LED charge indicator
• Six listed protection circuits
• 1-year warranty

Best for
Mowing without waiting on a recharge

The 2Pack 7.5Ah OP40601 Replacement for Ryobi kit from Enermall includes two 40V 7.5Ah batteries, rated at 300Wh each, plus an OP401-style charger and a user manual. The charger accepts 110 to 230V AC with a US flat-pin plug.

The listing says the batteries work with all original Ryobi 40V tools and chargers, naming mowers and trimmers such as RY40200, RY40403, RY40204, RY40530, RY40460, RY40180 and RY40250. The charger communicates with the battery’s chip to control current, voltage and temperature, then shows a green light when charging is complete. Total listed weight is 3.4 kg.

It suits larger lawns where one pack will not finish the job. Swap in the second battery while the first charges, and you effectively double runtime. As a Ryobi 40V battery and charger bundle, it offers the most capacity overall.

Best for
Straight OP4026 replacement

The 40v 7.5Ah OP4026A Battery Replacement from Munikind lists OEM OP4026 as its reference and covers the usual family of Ryobi 40V battery numbers, from OP4015 to OP4060A. It names tool compatibility with RY40200, RY40403 and RY40204 and chargers OP401 and ZROP401.

It has four LED indicators, no memory effect, and protection against over-charging, over-discharging, over-voltage, over-current, short-circuit and overheating. The listed battery weight of 1 gram is clearly a data error, and the warranty field says only “1,” which we read as one year but the listing does not state clearly.

It suits owners replacing an OP4026-series battery who want more capacity. It lacks the extras of the kits, but covers the basics well.

Best for
Ryobi 18V ONE+ tool owners

The 2 Packs 6.0Ah 18V Battery Replacement from Ultraaxis is not a battery for 40V mowers. It is an 18V, 6.0Ah pair for Ryobi’s 18V system, compatible with P102, P103, P104, P105, P107, P108 and P109 tools according to the listing.

Each battery has an LED indicator and protections against over-charging, over-discharging, over-voltage, over-current and overheating. The brand appears as both Ultraaxis and Ultraxxis in the listing, and the listed 29 g weight is unrealistic. The warranty is one year, and the seller advertises round-the-clock customer service.

It suits owners of Ryobi 18V drills, string trimmers, blowers or accessories such as the Ryobi 18V power station. If your mower is 40V, skip this one.

Best for
Longer runtime than a 3.0Ah stock pack

The 7.5Ah 40 Volt Replacement for Ryobi from OHYESBAT shares a near-identical compatibility list with the Munikind pack, with OEM OP4026 as its reference, and supports RY40200, RY40403, RY40204 tools and OP401 and ZROP401 chargers.

An LED display shows remaining capacity, and the seller claims about twice the runtime of a standard 3.0Ah pack, which is consistent with the capacity math. Some specifications are unreliable: voltage is listed as “40 volts of alternating current,” which is wrong for a battery, and the 200 g weight is implausibly low.

It suits owners upgrading from a small stock battery. Because it overlaps so closely with the Munikind, choose on availability and warranty terms.

Best for
Replacing a lost or dead charger too

The Powilling 40V 6.5Ah Compatible with Ryobi kit pairs one 6.5Ah 40V battery with a wall-mountable OP401-style charger. The charger is listed with 2-hour fast charging and red/green LED diagnostics.

The battery is described as working with all Ryobi 40V tools, including RY40200, RY40403, RY40530, RY40204, RY40250, RY40402A, RY40460 and RY40180. Powilling offers 45 days money back and a 12-month warranty. The 3 g listed weight is another data error.

It suits anyone replacing both a battery and a charger. At 6.5Ah it is a little smaller than the 7.5Ah picks. If you are considering another mower platform entirely, our battery lawn mower guide covers alternatives.