Yuasa L31-EFB 12V 100Ah EFB leisure battery

The Yuasa L31-EFB 12V 100Ah EFB leisure battery is an EFB battery intended for leisure battery duties in caravans, motorhomes and marine auxiliary systems where greater cycle durability and faster charging are needed than a conventional flooded leisure battery can typically provide.

Yuasa places the L31-EFB within its YBX Active Leisure range as a next-generation 12V auxiliary battery using Enhanced Flooded Battery (EFB) technology. This gives the battery improved endurance, more available cycles and stronger charge acceptance, making it a sensible step up where a standard wet battery is not quite enough but AGM or lithium is not yet necessary.

Why this product makes sense

For campervans, caravans and motorhomes with moderate auxiliary demand, motor mover wiring or more regular off-grid usage, a basic flooded battery can start to feel a bit optimistic. The L31-EFB is designed to handle repeated charging and discharging more effectively, while remaining fully maintenance free and retaining the familiar serviceability of a conventional lead-acid format.

With 12V nominal voltage, 100Ah capacity, 750A CCA, 900 MCA and a 1200Wh energy rating, the L31-EFB offers a solid balance between reserve capacity and durability. Yuasa rates it at 225 cycles and NCC Class B, making it suitable for installations with electrical hook-up and modest off-grid habitation demand.

Key specifications

• Manufacturer Part Number: L31-EFB
• Nominal voltage: 12V
• Capacity (20hr): 100Ah
• Rated CCA: 750A
• Marine cranking amps: 900A
• Energy: 1200Wh
• Technology: EFB / Ca/Ca
• Terminal type: TM
• Case type: GR31 BCI EFB
• Dimensions (L x W x H): 330 x 173 x 240 mm
• Weight: 26 kg

Typical applications

• Caravan and motorhome auxiliary battery systems
• Campervan electrical systems with moderate off-grid demand
• Leisure installations with motor mover wiring
• Marine auxiliary power duties where improved cycling is useful

If you need a leisure battery with better cycling performance and faster charging than a standard wet unit, the Yuasa L31-EFB is a practical and credible mid-step before moving into AGM or lithium territory.