Yuasa SWL+2900-12FT Industrial VRLA battery - 12V / 96.8Ah (front terminal)

The Yuasa SWL+2900-12FT is a highly specialised VRLA battery in the Front Terminal design (FT). With a nominal capacity of 96.8 Ah (often classified as 100Ah class) and the proven SWL+ high current technology, this battery has been specifically developed for telecommunications applications and 19-inch UPS cabinets designed.

The "FT" in the name stands for the front-mounted terminals. This allows extremely simple installation and maintenance in tight rack systems, as no dangerous work is required above the batteries. Combined with a life expectancy of 12+ years (Very Long Life) this is the ideal solution for space-critical data centres and network nodes.

Highlights at a glance

• Front Terminal design (FT): The terminals are located on the front of the slim block. This enables quick installation and voltage measurement directly from the front, without having to pull the batteries out of the rack.
• Optimised for 19" & 23" cabinets: The design is long and narrow. As a result, for example, four of these blocks fit perfectly side by side in a standard level of a 19-inch server cabinet or ETSI rack.
• High energy density (96.8 Ah): Despite its compact footprint, the block offers almost 100 Ah capacity. It is ideal for long bridging times in telecommunications or short high-current phases in the UPS.
• Central degassing possible: The FT series usually has connections for hoses for central degassing. This allows any escaping gases to be specifically directed out of the closed cabinet.
• Eurobat "Very Long Life": Classified for 12+ years. The SWL+ technology uses improved grid alloys to minimise corrosion and maximise service life even with fluctuating temperatures (typical for outdoor telecom cabinets).
• Maintenance-free: VRLA-AGM technology (Absorbent Glass Mat). No water topping up needed, leak-proof and vibration-resistant.

Areas of application

The SWL+2900-12FT dominates wherever space is money and maintenance needs to be quick:

• Telecommunications: Base stations (BTS), outdoor enclosures, switching centres.
• UPS systems (rackmount): In server rooms, where batteries are installed directly in the IT rack.
• Renewable energies: Buffer storage in compact control cabinets.
• Railway technology: Signal systems (thanks to vibration resistance and compactness).

Assembly & Maintenance (Front Terminal Advantages)

• Simple voltage measurement: As the terminals are at the front, a technician can check the block voltages (SOH check) in seconds by simply opening the rack door.
• Safe installation: There is no need to reach over the terminals with tools (minimising risk of short circuits).
• Torque: The M8 front terminals should be tightened with the prescribed torque (usually approx. 6 Nm) as specified.
• Monobloc connectors: Rigid copper connectors or short flexible bridges are often provided/required to interconnect the blocks side by side.

Features

FAQs about the Yuasa SWL+2900-12FT

What is the difference to a normal SWL2900?

The difference lies purely in the design.

• Standard (Top Terminal): Terminals are located on top of the lid. The block is rather cubic (wider).
• FT (Front Terminal): Terminals are at the front. The block is very slim ("shoebox" design) and deep. Electrically the performance data is nearly identical, but the FT version is essential for 19-inch cabinets.

Can I install the battery horizontally?

Theoretically yes, but usually not necessary. The FT design is designed to be upright (standing on the floor) pushed into rack levels. This makes optimal use of space. Horizontal installation is possible thanks to AGM, but with this specific housing design rarely offers advantages.

Do I need a special rack?

Yes, or a suitable cabinet. The batteries are approx. 40 cm deep. Your rack or cabinet must accommodate this depth and the corresponding load (approx. 150 kg per level with 4 blocks). Standard network cabinets are ideal for this.