Ultralife LiFePO4 lithium battery URB1270 12V 7.6Ah (SLA replacement)

The OPTIMA RedTop RT S 2.1 is a revolutionary 6-volt high-performance starter battery that, thanks to patented SPIRALCELL TECHNOLOGY®, delivers maximum starting power in a compact and extremely rugged case. With a nominal voltage of 6 V and an enormous cold cranking current of 800 A for this class, it is the ultimate solution for classic vehicles and demanding applications that require a reliable and powerful 6-volt energy source. Its extreme vibration resistance and absolutely maintenance-free, leakproof design make it the first choice for classic cars, hot rods and tractors.Highlights at a glanceMaximum 6V starting power: Offers the highest possible starting performance for reliable engine starts, even in large-displacement 6-volt engines.SPIRALCELL TECHNOLOGY®: Unique spiral cell construction for extreme vibration resistance and a longer service life.Extreme vibration resistance: Up to 15 times more vibration-resistant than conventional batteries, ideal for use in older vehicles without modern suspension.Absolutely maintenance-free and leakproof: The sealed AGM construction allows installation in almost any position and prevents paint damage caused by acid leakage.Long service life: Lasts up to three times longer than a conventional 6-volt starter battery.Maximum performance for classic vehiclesThe OPTIMA RedTop RT S 2.1 was specifically developed to bring the performance and reliability of modern technology to classic 6-volt vehicles. It is the ideal choice for classic cars, classic vehicles, hot rods and historic agricultural vehicles, which often have engines that are difficult to start. Even after longer periods of inactivity, as is typical for collector's vehicles, it reliably supplies the necessary power for an effortless start.Superior SPIRALCELL TECHNOLOGY®At the heart of every OPTIMA battery is the unique SPIRALCELL TECHNOLOGY®. Instead of flat lead plates, high-purity lead spirals are used, wrapped in glass fiber fleece (AGM). This compact and extremely stable design minimizes plate spacing, maximizes active surface area and reduces internal resistance. The result is unrivaled starting performance that can be consistently delivered even under the harshest conditions.Built for the most demanding conditionsThe OPTIMA RedTop is designed for tough use. Its sealed construction not only prevents acid leakage, which is especially important in valuable classics, but also evaporation, making it absolutely maintenance-free. The rugged construction made of impact-resistant polypropylene and the extreme vibration resistance ensure that vibrations and shocks cannot harm the battery. Features  ModelOPTIMA RedTop RT S 2.1 TechnologyAGM Spiralcell Nominal voltage (V)6 Capacity (Ah)50 Cold cranking current EN (A)815 Dimensions (L x W x H in mm)254 x 90 x 206 ConnectionSAE-Autopol Weight (kg)approx. 8.5  FAQs about the OPTIMA RedTop 6V batteryWhat is the main advantage of SPIRALCELL TECHNOLOGY® in a classic car?In classic vehicles, spiral cell technology offers two decisive advantages: first, extreme vibration resistance, which is of great benefit in older chassis. Secondly, it is absolutely leakproof, which protects valuable paint and body parts from acid damage, a common problem with old wet batteries.What is the difference between OPTIMA RedTop, YellowTop and BlueTop?RedTop: A pure high-performance starter battery for maximum starting power. Ideal for vehicles where starting is the main load. YellowTop: A 12-volt dual-purpose battery (starting and supplying) for vehicles with high energy requirements due to additional consumers. BlueTop: A 12-volt special battery for marine and leisure vehicles.Do I need a special charger for this 6V AGM battery?Yes, it is very important to use a modern, microprocessor-controlled charger that is suitable for both 6 volts and AGM technology. Old, unregulated 6-volt chargers can damage the battery due to overvoltage.Can this battery be deeply discharged?The RedTop is designed as a pure starter battery and should not be deeply discharged, as this can shorten its service life. For applications where power is regularly required for consumers at a standstill (e.g. a music system), a YellowTop or BlueTop battery (which are only available in 12V) would be the right choice.How should this lead-acid battery be disposed of?Lead-acid batteries contain environmentally harmful substances and must not be disposed of in household waste. You can return your old battery free of charge to any retailer selling new batteries or municipal recycling centers to ensure proper recycling.

The OPTIMA YellowTop YT S 2.1 is a revolutionary 6-volt high-performance AGM battery that, thanks to the patented SPIRALCELL TECHNOLOGY®, combines the starting power of a starter battery with the cycle durability of a supply battery. With a nominal voltage of 6 V and a capacity of 38 Ah, it is the ultimate solution for classic vehicles and special applications that have been retrofitted with modern, high-current consumers. Its extreme vibration resistance and absolutely maintenance-free, leak-proof design make it the first choice for the most demanding 6-volt applications.Highlights at a glance6-volt dual-purpose functionality: Offers starting power and cycle durability for classic vehicles with high energy requirements.SPIRALCELL TECHNOLOGY®: Unique spiral cell design for extreme vibration resistance and longer service life.High cycle durability: Ideal for vintage cars with modern hi-fi systems or additional lighting.Absolutely maintenance-free and leak-proof: The sealed AGM design allows installation in almost any position and protects valuable original materials.Fast recharge: Absorbs charge considerably more quickly than conventional 6-volt batteries.Maximum performance for classic vehicles with modern requirementsThe OPTIMA YellowTop YT S 2.1 was purpose-built for the special requirements of 6-volt vehicles that need more than just starting current. It is the ideal choice for vintage cars, hot rods, and tractors equipped with powerful stereo systems, navigation systems, electric fans or other modern consumers. It reliably provides the high current to start the engine and then powers the additional equipment when stationary without losing performance.Superior SPIRALCELL TECHNOLOGY®At the heart of every OPTIMA battery is the unique SPIRALCELL TECHNOLOGY®. Instead of flat lead plates, high-purity lead spirals are used which are wrapped with a glass fibre fleece (AGM). This compact and extremely robust design minimises internal resistance, resulting in superior starting power, faster charging and unmatched vibration resistance. This technology makes the YellowTop the perfect hybrid solution for demanding 6-volt systems.Built for the most demanding conditionsThe OPTIMA YellowTop is designed for tough use. Its sealed construction not only prevents acid leakage—which is especially important in valuable vintage cars to avoid damage to paint and bodywork—but also evaporation. This makes it absolutely maintenance-free. The up to 15 times higher vibration resistance compared to conventional batteries ensures that vibrations in older vehicles do not harm the battery. Features  ModelOPTIMA YellowTop YT S 2.1 TechnologyAGM Spiralcell Nominal voltage (V)6 Capacity (Ah)38 Cold start current EN (A)460 Dimensions (L x W x H in mm)254 x 90 x 206 ConnectionSAE car pole Weight (kg)approx. 8.9  FAQs on the OPTIMA YellowTop 6V batteryWhat is the main advantage of SPIRALCELL TECHNOLOGY® in a classic car?In classic vehicles, spiral cell technology offers two decisive advantages: Firstly, extreme vibration resistance, which is very useful in older chassis. Secondly, it is completely leak-proof, which protects valuable paint and bodywork from acid damage—a common problem with old wet batteries.What is the difference between the 6V YellowTop and the 6V RedTop?YellowTop (6V): A dual-purpose battery (starting and supply). It is ideal for 6-volt vehicles with additional electrical consumers such as a powerful music system, as it can handle deep discharges. RedTop (6V): A pure high-performance starter battery. It is the right choice if starting is the main load and no significant consumers are operated when stationary.Do I need a special charger for this 6V AGM battery?Yes, it is very important to use a modern, microprocessor-controlled charger that is suitable for both 6 volt and AGM technology. Old, unregulated 6-volt chargers can damage the battery through overvoltage.How should this lead-acid battery be disposed of?Lead-acid batteries contain environmentally harmful substances and must not be disposed of with household waste. You can return your old battery free of charge to any dealer who sells new batteries or to municipal recycling centres to ensure proper disposal.

The XCELL XP1.2-12 is a compact 12-volt AGM lead-acid battery with a nominal capacity of 1.2 Ah. It reliably supplies energy in safety-related devices and industrial applications, impresses with easy integration and defined charging parameters for standby and cyclic operation.Highlights at a glanceCompact and lightweight: 97 x 43 x 58 mm at approx. 0.54 kgVdS approved: G 114095 for safety applicationsMaintenance-free thanks to AGM technology and valve-regulated constructionClear charging windows: Float 13.60 to 13.80 V, Cycle 14.50 to 14.90 VSolid power reserve: up to 18 A discharge current for 5 secondsUse and PerformanceThe XP1.2-12 is designed for alarm and security technology, emergency lighting, communication and measuring devices as well as small control units. The internal impedance of approx. 90 mΩ supports stable voltage supply, even during short load peaks. The permissible discharge range from −15 °C to +50 °C enables operation in different environments.Efficiency and Service LifeIn float operation, an expected service life of 3 to 5 years at 20 °C is envisaged. The self-discharge is low: at 25 °C approx. 91 percent capacity remains after 3 months, 82 percent after 6 months and 65 percent after 12 months of storage. This means the battery remains reliably available even after idle periods.Installation and Charging RecommendationsThe battery has T1 terminals for quick, secure installation. For standby operation, a charging voltage of 13.60 to 13.80 V at 25 °C with temperature compensation of −18 mV per °C is recommended. In cyclic operation, 14.50 to 14.90 V at 25 °C with −30 mV per °C compensation applies. The maximum charging current is 0.36 A.Features  ModelXCELL XP1.2-12 VdS Battery typeVRLA AGM (safety technology) Nominal voltage (V)12 Capacity (Ah)1.2 (at 20h rate) Maximum discharge current18A (for 5 seconds) Charging voltage (standby charge)13.5V - 13.8V Charging voltage (cyclic operation)14.4V - 15.0V Operating temperature (°C)Charge: 0 ~ 40 / Discharge: -20 ~ 50 Storage temperature (°C)-20 ~ 40 Service lifeup to 5 years (EUROBAT: Standard Commercial) Dimensions (L/W/H, mm)97 x 43 x 58 Weight (kg)approx. 0.57 ConnectionFaston 187 (4.8 mm) CertificationsVdS, ISO9001, CE, UL  FAQs about the XCELL XP1.2-12What is the expected service life of the XP1.2-12 in standby operation?At 20 °C, 3 to 5 years in float operation is envisaged. Regular functional checks and appropriate charging voltage increase availability.For which applications is the XP1.2-12 battery suitable?Preferred for alarm and signalling systems, emergency lighting, communication and measuring devices as well as compact controllers with 12-volt supply.Which charging voltages should be used?In float charge operation, the voltage should be between 13.60 V and 13.80 V at 25 °C. In cyclic operation, the recommended voltage range is 14.50 V to 14.90 V. Please note the temperature compensation.What is the self-discharge rate?At 25 °C, approx. 91 percent of the capacity remains after 3 months, approx. 82 percent after 6 months, and approx. 65 percent after 12 months storage.Which terminals are present on the battery?T1 flat plug terminals for quick integration into devices and assemblies.Which VdS approval does the battery have and is it system-bound?The battery is VdS-approved under number G114095 and the approval is not system-bound. 

The XCELL XP2.3-12 is a slim 12 volt AGM lead-acid battery with a nominal capacity of 2.3 Ah. It provides reliable power supply in safety-relevant and industrial applications and, with VdS G 115071, fulfils the requirements for professional use.Highlights at a glanceReliable capacity: 2.3 Ah at 20 hours to 10.5 VVdS recognised: G 115071, additionally UL and CE, manufactured to ISO 9001Power reserve: up to 34.5 A discharge current for 5 secondsSlim design: 178 x 35 x 67 mm at approx. 0.9 kgMaintenance-free: valve-regulated AGM technology with ABS housingLow self-discharge: 91 per cent residual capacity after 3 months at 25 °CApplications and performanceThe XP2.3-12 is suitable for alarm and security equipment, emergency lighting, fire alarm systems, communications and measuring devices, as well as control and regulation technology. The internal impedance of approx. 60 mΩ (fully charged, 25 °C) supports stable voltage supply, even during short-term load peaks.Charging parameters and operationFor standby operation, 13.60 to 13.80 V at 25 °C with temperature compensation of minus 18 mV per °C is recommended. In cyclic operation, the end-of-charge voltages are 14.50 to 14.90 V at 25 °C, compensation minus 30 mV per °C. The maximum charging current is 0.69 A. The permissible temperature range is from minus 15 °C to plus 50 °C during discharge, minus 10 °C to plus 50 °C during charging, and minus 20 °C to plus 50 °C for storage.Dimensions and connectionThe T1 flat plug connectors made of copper allow quick integration into existing systems. The compact, elongated design means the battery can be positioned particularly well in narrow housings and racks.Features  ModelXCELL XP2.3-12 VdS Battery typeVRLA AGM (safety technology) Nominal voltage (V)12 Capacity (Ah)2.3 (at 20h rate) Maximum discharge current34.5A (for 5 seconds) Charging voltage (float charge)13.5V - 13.8V Charging voltage (cyclic use)14.4V - 15.0V Operating temperature (°C)Charging: 0 ~ 40 / Discharge: -20 ~ 50 Storage temperature (°C)-20 ~ 40 Service lifeup to 5 years (EUROBAT: Standard Commercial) Dimensions (L/W/H, mm)178 x 35 x 66 Weight (kg)approx. 0.94 ConnectionFaston 187 (4.8 mm) CertificationsVdS, ISO9001, CE, UL  FAQs about the XCELL XP2.3-12What is the expected service life for the XP2.3-12 in standby operation?At 20 °C, the XP2.3-12 battery is designed for 3 to 5 years in float operation. Regular test cycles and correct charging voltage increase availability.For which applications is the XP2.3-12 battery suitable?Preferred for safety-related systems such as fire alarm systems and intruder alarm systems, emergency lighting, communications and measuring devices, as well as controls with 12 volt supply.Which charging voltages must be observed?Float 13.60 to 13.80 V at 25 °C, cyclic operation 14.50 to 14.90 V. Please observe the respective temperature compensation.What is the self-discharge rate?At 25 °C, about 91 per cent capacity remains after 3 months, 82 per cent after 6 months and 65 per cent after 12 months of storage.Which connectors are present on the XP2.3-12?The XP2.3-12 is equipped with T1 flat plug connectors made of copper for quick, secure installation. 

The XCELL XP56 is a reliable 6-volt lead-acid battery with a 5 Ah capacity, representing long-lasting performance, high safety, and a compact design. It is ideally suited for safety-critical applications where a constant power supply is required.Highlights at a glanceHigh capacity: Delivers 5 Ah with a 20-hour discharge to 5.25 V.Long service life: Up to 10 years standby operation at 20°C.High current capability: Maximum discharge current of 75 A for 5 seconds.Compact & lightweight: Dimensions 70 x 47 x 107 mm with a weight of only 0.8 kg.Safe & robust: Housing made from ABS plastic (UL94 V0), UL and CE certified.Reliable for a range of applicationsThe XP56 is a proven energy storage unit for security and alarm systems, emergency lighting, UPS systems, telecommunications, and many other devices with 6V power supply. Its high load capability makes it particularly suitable for applications with short-term peak loads.Technology that deliversThanks to Absorbent Glass Mat (AGM) technology, the battery is leak-proof, maintenance-free, and provides consistent performance. Its low self-discharge rate of approx. 9% in three months (at 25°C) ensures it remains reliably ready for use even after extended idle periods. Its operating temperature range of -15°C to +50°C in discharge mode also allows for flexible use in different environments.Compact design and simple installationWith T1 terminals (Faston 4.8 mm), the XP56 can be installed quickly and safely. Its slim dimensions make it especially suitable for devices and systems where space is at a premium. The robust construction ensures maximum operational safety.Specifications  ModelXCELL XP5-6 Battery typeVRLA AGM (standby / general purpose) Nominal voltage (V)6 Capacity (Ah)5 (at 20h rate) Maximum discharge current75A (for 5 seconds) Charging voltage (float)6.75V - 6.9V Charging voltage (cyclic operation)7.2V - 7.5V Operating temperature (°C)Charge: 0 ~ 40 / Discharge: -20 ~ 50 Storage temperature (°C)-20 ~ 40 Service lifeup to 5 years (EUROBAT: Standard Commercial) Dimensions (L/W/H, mm)70 x 47 x 107 Weight (kg)approx. 0.81 TerminalFaston 187 (4.8 mm) CertificationsISO9001, CE, UL  Frequently Asked Questions about the XCELL XP56How long is the battery’s service life?The XP56 offers a standby service life of up to 10 years at 20°C.What applications is the battery suitable for?The battery is ideal for security and fire alarm systems, emergency lighting, UPS systems, and telecommunications equipment.How high is the self-discharge?At 25°C, self-discharge is about 9% after three months, 18% after six months and 35% after a year.What terminals does the battery have?The XP56 is equipped with Faston 4.8 mm terminals (T1) which allow for easy and secure installation.What technology does the battery use and is it maintenance free?It is a sealed AGM (Absorbent Glass Mat) lead-acid battery with ABS housing. It is maintenance free, leak-proof and can be used in any installation position.What is the battery’s operating temperature range?The recommended temperature range for operation is –15 °C to +50 °C for discharging and –10 °C to +50 °C for charging; storage is possible from –20 °C to +50 °C. 

The XCELL XCELFP1212S is a compact lithium iron phosphate battery (LiFePO₄) with a nominal voltage of 12.8 V and a capacity of 12 Ah. Equipped with an integrated battery management system (BMS), it offers reliable protection against overcharging, deep discharge, short circuit and overtemperature. With over 2000 charge cycles at 80 % depth of discharge, this battery is the ideal choice for applications where longevity, safety and compact dimensions are paramount, for example in mobile energy systems, emergency power supplies or as a replacement for VRLA batteries.Highlights at a glanceCompact power: 12 Ah capacity at 12.8 V – 153.6 Wh total energyDurable: More than 2000 cycles at 80 % depth of discharge (DOD)BMS integrated: Protection against overcharging, deep discharge, short circuit and overtemperatureRobust housing: ABS container seamlessly replaces VRLA batteriesFast charging capability: Efficient charging times with high current acceptancePowerful in diverse applicationsWhether in mobile devices, compact solar storage systems or as a reliable emergency power source: The XCELFP1212S impresses with its versatility. It is lightweight (only 1.21 kg) and compact (151 x 65 x 93.5 mm) and can be used even under demanding environmental conditions from -20 °C to +55 °C. By connecting up to two batteries in parallel or up to four batteries in series, a custom scalable energy system can be built.Efficiency and safety by designThe integrated hardware BMS reliably controls and monitors all charging and discharging processes. It protects against typical risks such as deep discharge or overtemperature, increasing service life and operational safety of the battery. The XCELFP1212S is maintenance-free, gas-free and has no memory effect, ideal for modern energy storage solutions.Robust LiFePO₄ technology for greater safety and longevityEquipped with cylindrical 21700 (3 Ah) LiFePO₄ cells, the battery stands out for its thermal stability, low self-discharge and high cycle life. Compared to conventional lead or lithium batteries, this cell technology offers a significantly higher level of safety and longer service life, even with frequent use under heavy loads.Features  ModelXCELL XCELFP1212S Battery typeLiFePO₄ (lithium iron phosphate) Nominal voltage (V)12.8 Capacity (Ah)12 Maximum discharge current12A (continuous) Recommended charging voltage14.4V - 14.6V Float charging13.6V - 13.8V Operating temperature (°C)Charging: 0 ~ 45 / Discharging: -20 ~ 60 Storage temperature (°C)-10 ~ 35 Service life>2000 cycles at 100% depth of discharge Dimensions (L/W/H, mm)151 x 98 x 100 Weight (kg)approx. 1.5 ConnectionFaston 250 (6.35 mm) Protection circuitIntegrated BMS  FAQs about the XCELFP1212S LiFePO₄ batteryHow many charge cycles does the XCELFP1212S battery offer?The XCELFP1212S achieves more than 2000 charge cycles at 80 % depth of discharge (DOD), which corresponds to a service life of over 10 years depending on application.Is a battery management system (BMS) integrated?Yes, the integrated BMS reliably protects the battery against overcharging, deep discharge, short circuit and overtemperature.For which applications is the XCELFP1212S suitable?The battery is ideal for compact energy storage solutions in fields such as mobile devices, rehabilitation and medical technology, UPS systems, renewable energy installations as well as caravan and marine applications.Can the battery be charged with conventional lead-acid chargers?Yes, the integrated BMS protection circuit allows charging with standard chargers for lead-acid batteries.Is the battery a compact and lightweight replacement for lead-acid batteries?Yes, it is compact, lightweight (approx. 1.21 kg) and replaces 12 V–15 Ah lead-acid batteries more efficiently thanks to low internal resistance and constant voltage characteristics.