Motobatt MBTX20U AGM Motorcycle and Jetski Battery

12V • 21Ah (10HR) / 22.3Ah (20HR) • 320 CCA • QuadFlex 4-terminal (M6 blocknut)

Product Overview

The Motobatt MBTX20U is a sealed AGM (VRLA) battery designed for strong, reliable starting performance in larger motorcycles, ATVs and personal watercraft (PWC) including jet skis. It is factory activated, non-spillable and maintenance-free, so there is no acid filling and no fluid top-ups required.

Motobatt’s QuadFlex 4-terminal design (2 positive and 2 negative) gives you more flexibility for cable routing and fitment compared to many standard powersport batteries. It is a popular replacement choice when you want a high-capacity AGM battery in a common YTX20 size format.

Key Features

Sealed AGM (VRLA) design - non-spillable, vibration resistant and maintenance-free.
Factory activated and ready to install - no acid pack or initial filling required.
High capacity for its size - 21Ah (10HR) / 22.3Ah (20HR) for sustained electrical loads.
Strong starting power with a 320 CCA rating for confident starts.
QuadFlex 4-terminal layout (2+ and 2-) helps suit more installations and accessory connections.

Technical Specifications

Battery Type

Sealed Lead Acid AGM (VRLA)

Voltage

12V

Capacity

21Ah (10HR) / 22.3Ah (20HR)

Cold Cranking Amps (CCA)

320 CCA

Dimensions (L × W × H)

175 × 87 × 155 mm

Approx. Weight

6.50 kg

Terminal Type

QuadFlex 4-terminal (M6 blocknut)

Warranty (private use)

12 months

Replaces Common Battery Model Numbers

The Motobatt MBTX20U is commonly used as a replacement for the battery codes below. This is useful for cross-referencing, but you should always confirm dimensions and terminal layout before ordering.

YTX / YTXH series: YTX20, YTX20L, YTX20-BS, YTX20BS, YTX20H-BS, YTX20HBS, YTX20L-BS, YTX20LBS, YTX20HL-BS, YTX20HLBS, YTX20HL-BS-PW, YTX20HLBSPW, YTX20H, YTX20HL, YTX20HL-PW, YTX20HLPW
12N series: 12N16-3A, 12N16-3B, 12N16-4A, 12N16-4B
YB series: YB16A, YB16A2, YB16B, YB16B2, YB16HL-A-CX, SYB16L-B, YB16L-A, YB16L-A2, YB16L-B, YB16L-B2, YB16C-B, YB16CL-B, YB16-B-CX
Other common cross references: GT16L-BS, GT16-BS, CTX19L-BS, CTX19-BS, GYZ20H, GYZ20L, GYZ20HL

Why Choose MBTX20U?

If you want a battery that is easier to fit than a standard 2-terminal unit, MBTX20U is a solid pick. The QuadFlex 4-terminal layout lets you select the most practical positive and negative posts for your wiring, which is handy on tight motorcycle installs and also on PWCs (jet skis) where cable routing and access can be awkward. Being sealed AGM, it is non-spillable and vibration resistant, which suits the harsh conditions powersports batteries live in.

It is also a good option when your bike or jetski runs added electrical loads (EFI, accessories, lighting, audio) and you want strong starting performance with higher capacity in a common footprint. For best life, keep it fully charged during storage and use a quality maintenance charger. On jet skis, protect the terminals from corrosion (clean, dry connections and a light coating of terminal protectant) and always secure the battery firmly to minimise vibration.

Voltage	12
CCA	310
Amp Hour	21
Length MM	175
Width MM	87
Height MM	155
Warranty	12
Assembly	Positive Right
Assembly	Positive Left
Battery Type	AGM
Weight KG	6.5
Model #	MBTX20U
Barcode #	06947312400071

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Basics

Q: What is the Motobatt MBTX20U designed for?

The Motobatt MBTX20U is a 12V sealed AGM (VRLA) powersports battery designed for reliable starting in motorcycles and other applications that use a YTX20-size battery.

Q: Can the MBTX20U be used in a jet ski (PWC)?

Yes. The MBTX20U is commonly used in PWCs (jet skis) because it is a sealed, non-spillable AGM battery suited to harsh, high-vibration environments. Always confirm the battery box size, hold-down, and cable reach match your current battery.

Q: What makes the MBTX20U a reliable, high-performance battery?

The MBTX20U is built around sealed AGM technology for vibration resistance and consistent starting performance. It is also factory activated (pre-conditioned and charged), which helps avoid the activation mistakes that often shorten the life of conventional powersports batteries.

Q: Is the Motobatt MBTX20U maintenance-free and non-spillable?

Yes. It is a sealed AGM (VRLA) battery, so there is no acid to fill and no fluid to top up. Being sealed and non-spillable also makes it suitable for applications where a wet-cell battery is not ideal.

Q: Is the MBTX20U ready to install out of the box?

Yes. The MBTX20U is a factory activated AGM battery and is designed to be ready for installation without acid filling. We still recommend checking state of charge before fitting, especially if the battery has been stored for a long period.

Size and Electrical Specs

Q: What are the MBTX20U dimensions and weight?

The MBTX20U measures 175 x 87 x 155 mm and weighs approximately 6.5 kg.

Q: What are the key electrical specs (Ah and CCA) for the MBTX20U?

Capacity is commonly listed as 21Ah (10HR) and 22.3Ah (20HR). Starting output varies by listing/spec sheet, but this model is typically shown around 310-330 CCA.

Fitment and Terminals

Q: What is Motobatt QuadFlex and what do the 4 terminals do?

QuadFlex uses four terminals (two positive and two negative) to give more fitment flexibility and easier cable routing across different bikes and PWCs. It can also make accessory connections simpler where suitable.

Q: What battery model numbers does the Motobatt MBTX20U replace?

It is commonly listed as a replacement for: YTX20, YTX20L, YTX20BS, YTX20HBS, YTX20LBS, YTX20HLBS, YTX20HLBSPW, YTX20H, YTX20HL, YTX20HL-PW, YB16A, YB16A2, YB16B, YB16B2, YB16HLACX, SYB16LB, YB16LA, YB16LA2, YB16LB, YB16LB2, YB16CB, YB16CLB, YB16BCX, GT16L-BS, GT16BS, CTX19-BS, CTX19L-BS, GYZ20H, GYZ20L, GYZ20HL, ETX16, ETX16L, ETX20, ETX20L, PC535, PC625. Always confirm physical size and terminal layout before ordering.

Charging and Care

Q: What charger should I use and how do I get the best life from the MBTX20U?

Use a quality smart charger that supports AGM batteries. If the vehicle is stored or used infrequently, a maintenance charger helps prevent deep discharge. For jet skis, keep terminals clean and protected from corrosion, and make sure the battery is securely clamped to reduce vibration.