ODS-AGM20L Odyssey Extreme Battery 12V 18Ah (YGZ20HL-BS) (YTX20L-BS) (GYZ20HL)

£188.38 Inc VAT

Guaranteed next working day delivery on orders before 1pm

New ODS-AGM20L – Extreme Series Batteries

The new ODS-AGM20L is a drop-in replacement for many popular motorcycle, ATV, UTV, snowmobile and personal watercraft applications. The ODS-AGM20L offers more initial cranking power than our competition and a drop-in fitment. Like all ODYSSEY Extreme powersports batteries, the ODS-AGM20L is a true dual-purpose battery and features a non-spillable Absorbed Glass Mat (AGM) design that’s built to take the pounding delivered by powersport vehicles.

How so much power is possible

ODYSSEY Extreme Series batteries are made with flat plates made of 99.99% pure lead – not lead alloy. Pure lead plates can be made thinner, so we can fit more of them in the battery. More ODYSSEY battery plates mean more plate surface area. And that means more power – twice as much as conventional batteries.

In fact, ODYSSEY batteries are capable of providing engine cranking pulses up to 2700 amps for 5 seconds – double to triple that of equally sized conventional batteries, even at very low temperatures.

ODYSSEY batteries deliver the massive starting power, rapid recovery, and amazing deep cycling capability that today’s vehicles demand.

Packed with more power

Like many popular spiral-wound batteries, ODYSSEY Extreme Series batteries employ dry cell Absorbed Glass Mat (AGM) technology to contain acid, allowing the battery to be installed even on its side. But the densely packed flat plates in an ODYSSEY Extreme Series battery avoid the “dead space” between cylinders in a “six pack” design. The result is 15% more plate surface area — and that translates to more power!


  • Thin Plate Pure Lead (TPPL) technology, contributing to twice the overall power and three times the life of conventional batteries
  • A sealed design, resulting in a virtually maintenance-free battery
  • The ability to resist extreme vibration, protecting against high impact shock vibrations that often lead to premature failure
  • Deep cycle power, unlike any other product offered today, to handle all your extra electrical demands

*Always cross reference dimensions and specifications to your existing battery before ordering.

Additional information

Weight 5.9 kg



12 Volt

Ah Capacity

18 Ah



PHCA (5 Sec)





175 mm


86 mm

Height (inc. Terminals)

155 mm


2 Year



Data Sheet

ODS-AGM20L Datasheet Odyssey ODS-AGM20L Datasheet


The Go Batteries Promise

  • Next working day delivery on UK orders *
  • Minimum 12 month guarantee
  • Free telephone support
  • * Guaranteed next working day delivery on orders placed before 1pm. For International and non-standard UK deliveries, please email: sales@gobatteries.co.uk or call +44 (0)1926 400080 for delivery options and advice. We`ll always do our best to get orders to you as fast as possible.

NOTE: Delivery costs are calculated based on post code and shown at the checkout stage From £7.99 – Nationwide Delivery (Terms) * For Highlands and Islands and non-standard UK delivery, please call us on +44 (0)1926 400080 for delivery options and advice. We’ll always do our best to get orders to you as fast as possible

Free disposable gloves with all orders

Odyssey Battery - Frequently Asked Questions

ODYSSEY Battery – Frequently Asked Questions