R&B 074601 - Maintenance-free lead-acid battery 4V / 3.5Ah (AGM)
Description
Product information
The R&B 074601 lead-acid battery (4V / 3.5Ah) is a compact and extremely reliable energy storage unit for small devices. Thanks to the proven AGM technology (Absorbent Glass Mat), where the battery acid is safely bound in a glass fibre mat, this lead-acid battery operates completely maintenance-free and is absolutely leak-proof.
With its nominal voltage of 4 volts and a capacity of 3.5 ampere-hours, it is the perfect replacement part to restore ageing everyday devices to full performance and long operating times. Its sturdy plastic case reliably protects the cells from shocks and vibrations.
Highlights at a glance
- Maintenance-free (VRLA): No distilled water needs to be refilled during the entire service life.
- Leak-proof & position-independent: Thanks to the AGM mat technology, the battery can be operated in almost any position (except permanently upside down).
- Low self-discharge: Maintains voltage steadily even during longer storage without constant recharging.
- Rugged case: The impact-resistant ABS plastic protects the battery from mechanical damage.
- No memory effect: The lead-acid technology allows intermediate charging at any time without the capacity permanently shrinking.
Areas of application
- Hand spotlights & work lights
- Serves as a precisely fitting replacement battery for many classic halogen or LED battery spotlights that require a 4V power supply.
- Commercial & Private Scales
- The standard energy storage for mobile platform scales, counting scales or market scales (e.g. from KERN or comparable manufacturers).
- Insect killers & camping accessories
- Provides long-lasting power in portable electric fly swatters, lanterns or small fans.
- Emergency power & alarm technology
- Is often used as a backup battery in small emergency lighting or self-sufficient security systems.
Installation & Safety instructions
- The correct charger
- Only ever use chargers that are explicitly approved for 4 volt lead-acid batteries. A 6V or 12V charger would destroy the battery immediately and entails a fire risk.
- Avoid deep discharge
- Lead-acid batteries do not tolerate complete discharge (deep discharge). Recharge the device promptly after every prolonged use to prevent harmful sulphation of the lead plates.
- Observe polarity
- Make sure you connect the cable lugs with the correct polarity: Red is plus (+), black is minus (−).
- Professional disposal
- Lead-acid batteries contain toxic heavy metals and must not be disposed of with household waste. Hand in the old battery free of charge to a retailer or at a local recycling centre.
Features
| Model / Article number | R&B 074601 |
| Technology | **VRLA / AGM** (lead-fleece) |
| Nominal voltage | **4.0 V** |
| Nominal capacity | **3.5 Ah** (3500 mAh) |
| End of charge voltage | 4.8 V - 5.0 V (Cycle use) |
| Connection type | **Faston 187** (4.8 mm plug connection) |
| Dimensions (L x W x H) | **90 x 34 x 60 mm** (height without contacts) |
| Total height | approx. 66 mm |
| Weight | approx. 0.43 kg |
| Service life | up to 5 years (standby use) |
FAQs about the R&B 074601 (4V/3.5Ah)
My old battery is 4V and 4Ah or 4.5Ah. Can I still use this 3.5Ah battery?
Yes, usually without any problem. The voltage (4V) must be strictly adhered to, but the ampere-hours (Ah) only indicate the "capacity". A 3.5Ah battery fits electrically perfectly, it merely provides a minimally shorter total runtime compared to a 4.5Ah battery. It is only important that the dimensions fit into your device's battery compartment.
Do I need to charge the battery before first use?
It is highly recommended. Although AGM batteries are supplied pre-charged from the factory, they can lose some voltage during storage. Full charging before first use ensures you get full performance and protects the cell chemistry.
Can I replace this lead battery with a modern lithium-ion one?
This is strongly discouraged. Lithium-ion batteries have a different voltage (usually 3.7V) and require completely different charging electronics. If you connect a Li-ion battery to the internal charging electronics for lead-acid batteries in your device, there is an acute risk of fire and explosion.Properties
| Capacity: | 3.4Ah |
|---|---|
| Tension: | 4V |
Reviews 0
Login
Customers also bought
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.