ASUNCELL RB18L50 18V 5.0Ah Replacement Battery

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Product guide

ASUNCELL RB18L50 18V 5.0Ah Replacement Battery

ASUNCELL RB18L50 is a rechargeable lithium-ion replacement battery listed for Ryobi 18V cordless power tools. Its stated 5Ah capacity and power-level indicator suit buyers wanting a spare or replacement, but the listing gives conflicting pack quantities.

At a glance

The listing states an 18V, 5Ah lithium-ion specification and names Ryobi 18V cordless tools as compatible.
A built-in LED indicator is claimed to show remaining power. Another section describes a four-stage display.
The listing claims protection against overcharge, over-discharge, over-current, overheating and short circuits.

Price

£36.00Save 22%

Reference price: ~~£45.99~~

Price checked: 14 Nov 2026

View offer

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Pros and cons

Pros

The claimed 5Ah capacity and charge indicator can help users plan when to swap or recharge a battery.
Two replacement batteries could provide a spare for compatible tools, if the selected listing is indeed the two-pack.

Technical specifications

9 specifications

Identity
Brand	ASUNCELL
Model	RB18L50

Power and battery
Battery type	Lithium Ion
Voltage	18 Volts
Capacity	5 Amp Hours
Rechargeable	Rechargeable
Weight	230 Grams

Compatibility and use
Recommended use	Power Tool
Stated compatible tools	for Ryobi 18V Cordless Power Tools

What to know before buying

Listing details to confirm

The listing is contradictory about quantity: the title and several feature sections say two batteries, while the battery-details field says one battery is included. It also describes the indicator both generally and as a four-stage gauge, and makes broad compatibility claims alongside a long list of specific models. Confirm the selected pack quantity, your exact tool or battery model compatibility, and the indicator details before buying.

Who is it for?

A good fit for

Ryobi 18V cordless-tool owners seeking a stated 5Ah replacement or spare battery.
Buyers who find a visible remaining-charge indicator useful for managing tool use.

Less suited to

Anyone needing a confirmed single- or two-battery pack without checking the selected listing.
Buyers who require independently verified runtime, compatibility or battery protection performance.

ASUNCELL RB18L50 18V 5.0Ah Replacement Battery · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 346 ratings

5 stars64%64%
4 stars17%17%
3 stars8%8%
2 stars4%4%
1 star7%7%

Customer feedback is positive about fit and perceived value, with some customers saying the batteries work well and last comparably to originals. Performance and battery life are also mixed, including reports of failure after little use or only a few hours of operation. For buyers relying on the stated 5Ah capacity for longer jobs, this variability matters more than the listed capacity alone guarantees.

Positive themes

Customers report good fit with Ryobi tools and appreciate the perceived value.

Negative themes

Some customers report early failure or only a few hours of battery life.

Mixed feedback

Feedback on performance and battery life varies, with some reports of satisfactory operation and others of short use or failure.

Frequently asked questions

What is the stated battery capacity and voltage?

The listing specifies 5 Amp Hours and 18 Volts.

Does it fit every Ryobi 18V tool?

The listing claims broad compatibility and names many battery and tool models, but does not establish compatibility independently. Check your exact tool or battery model against the selected listing.

How many batteries are included?

The listing conflicts: its title and feature text claim two, while the battery-details field states one included battery. Confirm the pack quantity before ordering.

Does it show remaining charge?

The listing claims an LED power indicator and elsewhere describes a four-stage display. The precise indicator arrangement is not consistent across the listing.