Rated 4.89 out of 5 based on 9 customer ratings

Ultramax Lawnmower Battery 12V 18Ah - (Replaces F19-12B)

£49.99

in stock

Amazon.co.uk

Amazon price updated: February 11, 2026 7:46 am

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Highest Price

£49.99 Amazon.co.uk

December 17, 2025

Lowest Price

£49.99 Amazon.co.uk

February 11, 2026

Current Price

February 11, 2026

Since December 17, 2025

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Last updated on February 11, 2026 7:46 am

Ultra Max NP18-12, 12v 18Ah. Dimensions: L(mm) W(mm) H(mm) 181 76 167
Brand New Fresh Stock for Maximum Performance 12v 18Ah Usable in any orientation (except continuous inverted).
Longer lifespan due to Heavy-duty plates and unique separator systems to deliver cyclic capability twice as long as conventional batteries
Supplied with 1 Year Manufacturer Warranty Support
Superior High Performance Battery – Supplied Fully Charged

Number of batteries	1 12V batteries required.
Brand	Ultramax
Battery cell composition	Sealed Lead Acid
battery capacity	18 Amp Hours
Recommended uses for product	Emergency,Medical

9 reviews for Ultramax Lawnmower Battery 12V 18Ah – (Replaces F19-12B)

Rated 5 out of 5
Mills733 – March 20, 2025
Battery fitted and works well.
Rated 5 out of 5
josephweir7xtz – March 28, 2025
The Battery Is A Good Job Fits And Works Great Will Please !
Rated 5 out of 5
JB – April 4, 2025
Arrived on time and fully charged. Easy to fit and started first time so works fine on our Mountfield 1530 H. At £49.99 an excellent price compared to Mountfield. Early days so can’t comment on how long it will last but will report back if there’s a problem.
Rated 5 out of 5
Kindle-klant – April 8, 2025
Batterij voldoet aan de verwachtingen en kwam volgeladen aan!
Rated 5 out of 5
Alex Petrides – April 15, 2025
Bought for my Mountfield ride on mower as was struggling to start, works really well and starts first time now
Rated 5 out of 5
Amazon Customer – April 23, 2025
Just what I needed. Connected it an away you go. Great buy.++++
Rated 4 out of 5
Helen Newell – May 2, 2025
Used for ride-on mower
Rated 5 out of 5
E. Fradley – May 17, 2025
these batteries fitted our mobility scooter perfectly . excellent .
Rated 5 out of 5
Mike vfr – May 19, 2025
Well made