Yuasa Lead-acid battery with 12V and 4Ah - NP4-12
Description
Product information
The Yuasa NP4-12 is a compact and reliable VRLA lead-acid battery with a nominal voltage of 12 volts and a capacity of 4 Ah. Thanks to its maintenance-free technology, flexible installation options and robust design, the battery is ideal for emergency power systems, safety-related applications and industrial electronics.
Highlights at a glance
- Reliable performance: 4 Ah capacity at 12 V (20h rate), 3.7 Ah at 10h rate.
- Compact format: Only 90 × 70 × 106 mm – ideal for confined installation spaces.
- Flexible installation: Can be operated in almost any position, except permanently upside down.
- Safe operation: With self-closing low-pressure vent valves.
- Maintenance-free: Valve-regulated VRLA technology – no topping up necessary.
- Long service life: EUROBAT classification “Standard Commercial” (3 to 5 years).
Compact energy source for a wide range of applications
With a capacity of 4 Ah at 20-hour discharge (up to 1.75 V/cell), the NP4-12 supplies constant energy even in tight spaces. For 10-hour discharge up to 1.8 V/cell, it delivers 3.7 Ah. The battery is ideal for systems with moderate current requirements and short-term load peaks of up to 120 A for one second.
Robust technology with ISO-certified quality
The NP4-12 is impressive with a long service life of up to 5 years at 20 °C and is ISO 9001 certified. Its low self-discharge rate of around 3 % per month ensures reliable operational readiness, even after prolonged storage.
The casing is made of robust ABS plastic (UL94:HB) and is optionally available in a flame-retardant version (UL94:V0). With an impedance of 40 mΩ (at 1 kHz), the battery offers solid performance and safety in operation.
Easy handling and safe operation
The NP4-12 is equipped with Faston plug-in terminals (4.75 mm) and can be quickly and easily integrated into existing systems. Installation is possible in any position, except for permanently upside-down mounting.
Each cell has a low-pressure vent valve for controlled gas pressure regulation. The maximum charging current in cyclic use is 1 A. There is no limit for the float charge. The recommended charging voltage is:
- 13.65 V (±1 %) in float operation
- 14.5 V (±3 %) in cyclic use
Features
| Model | Yuasa NP4-12 |
| Battery type | VRLA AGM (maintenance-free) |
| Nominal voltage (V) | 12 |
| Capacity (Ah) | 4 (at 20h rate) |
| Maximum discharge current | 40A (for 5 seconds) |
| Charging voltage (float) | 13.65V (±1%) |
| Charging voltage (cyclic) | 14.7V (±3%) |
| Operating temperature (°C) | -15 ~ 50 |
| Storage temperature (°C) | -20 ~ 50 |
| Service life | Up to 5 years (according to Yuasa design) |
| Dimensions (L/W/H, mm) | 90 x 70 x 101 |
| Weight (kg) | 1.7 |
| Connection | Faston 4.8mm |
| Certifications | IEC 60896-21+22, VdS, UL |
FAQs about the Yuasa NP4-12 lead-acid battery
For which applications is the NP4-12 battery suitable?
The battery is suitable for:
- Security and alarm systems
- UPS and emergency power systems
- Medical devices
- Control and measurement technology
- Lighting systems
What safety functions does the NP4-12 provide?
It has self-closing low-pressure vent valves for safe pressure regulation and a robust casing – optionally in a flame-retardant design.
How high is the self-discharge?
The self-discharge is about 3 % per month at 20 °C, which enables reliable operation even after prolonged storage.
What capacity and energy does it really deliver?
- Nominal capacity: 4 Ah at 20-hour discharge (20 HR)
- 10-hour rate (higher current): approx. 3.7 Ah at 1.8 V/cell and 20 °C
- Energy content corresponds to approx. 48 Wh (12 V × 4 Ah) or about 44 Wh at 10-HR discharge
How long does the battery last in standby or cyclic operation?
- In float/standby operation: design life of 3–5 years according to EUROBAT standard
- In cyclic operation: over 1,000 cycles possible, depending on depth of discharge and ambient temperature
How should the NP 4-12 be charged correctly (float vs. cycle)?
- Float charge voltage (20 °C): approx. 13.65 V block (2.275 V/cell), temperature compensation −3 mV/cell/°C
- Cyclic or boost charge: approx. 14.5 V block (2.42 V/cell), temperature compensation −4 mV/cell/°C
- For cyclic use: maximum charging current 1 A (~0.25 C)
Properties
| Capacity: | 4Ah |
|---|---|
| Tension: | 12V |
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The Yuasa NP7-12 is a powerful, valve-regulated lead-acid battery (VRLA) with a nominal voltage of 12 volts and a capacity of 7 Ah. It impresses with its reliable performance, robust design and versatile application options, ideal for industrial applications, safety and emergency power systems.Highlights at a glanceReliable capacity: 7 Ah at 12 V for constant power supply.Compact format: 151 × 65 × 97.5 mm, ideal for limited installation space.Flexible installation: Can be installed in any position, except permanently upside down.Maintenance free: VRLA technology with low pressure drain valves.Durable: EUROBAT classification "Standard Commercial" for up to 5 years of use.High current carrying capacity: Up to 210 A discharge current for 1 second.Robust performance for demanding applicationsThe NP7-12 offers a 20-hour capacity of 7 Ah (up to 1.75 V/cell at 20°C) and a 10-hour capacity of 6.4 Ah (up to 1.8 V/cell). Thanks to its high current carrying capacity of up to 210 A for 1 second, the battery is particularly suitable for emergency power systems, UPS systems and safety-related applications.Maintenance-free operation and long service lifeThe NP7-12 is classified as "Standard Commercial" according to EUROBAT and offers a service life of up to 5 years at 20°C ambient temperature. The self-discharge is only about 3% per month, ensuring a high level of operational readiness even after extended storage. The housing is made of durable ABS plastic (UL94:HB) and is also available in a flame-retardant version (UL94:V0) upon request. The battery meets the ISO 9001 quality standard.Easy integration and reliable technologyThe battery is equipped with Faston connectors (4.75 mm) and can be easily integrated into almost any system. Installation is possible in all positions, except permanently upside down. Each of the six cells is fitted with a low-pressure relief valve, which reseals automatically after pressure equalisation for maintenance-free and safe operation. The recommended float charge voltage is 13.65 V (±1%) per unit, for cyclic operation 14.5 V (±3%). The maximum charging current is 1.75 A during cyclic operation; for float charging there is no limit.Features ModelYuasa NP7-12 Battery typeVRLA AGM (maintenance-free) Nominal voltage (V)12 Capacity (Ah)7 (at 20h rate) Maximum discharge current80A (for 5 seconds) Charge voltage (float charge)13.65V (±1%) Charge voltage (cyclic operation)14.7V (±3%) Operating temperature (°C)-15 ~ 50 Storage temperature (°C)-20 ~ 50 Service lifeUp to 5 years (according to Yuasa design) Dimensions (L/W/H, mm)151 x 65 x 94 Weight (kg)2.5 ConnectionFaston 6.3mm CertificationsIEC 60896-21+22, VdS, UL FAQs about the Yuasa lead-acid battery with 12V and 7AhHow long does the NP7-12 last?The NP7-12 offers a service life of up to 5 years at 20°C ambient temperature and complies with the EUROBAT category "Standard Commercial".For which applications is the battery suitable?The battery is suitable for:UPS systemsFire detection and alarm systemsMedical devicesEmergency lightingTelecommunications and control systemsIs flexible installation possible?Yes, the battery can be operated in almost any position, just avoid a permanently upside down mounting position.What safety features are integrated?The battery features a robust ABS housing and low-pressure relief valves for safe gas pressure regulation. A flame-retardant housing is optionally available.How and with which parameters is the NP7‑12 charged correctly?Float charging voltage: 13.65 V unit voltage (2.275 V/cell) at 20°C, temperature compensation –3 mV/cell/°C.Cyclic (boost) charging voltage: 14.5 V unit (2.42 V/cell), compensated with –4 mV/cell/°C.Recommended charging current for cyclic operation: up to approx. 1.75 A (~0.25 C)What is the maximum discharge current and how good is the deep discharge resistance?Short-term peak current (1 sec): 210 A,1‑minute current: 48 AInternal impedance: about 23 mΩ at 1 kHz.The battery recovers excellently after deep discharge and is structurally robust in designWhat is the self-discharge during storage and what should be observed?At 20°C, the self-discharge is about 3% per month. The NP7‑12 can be stored for up to 12 months, provided it is recharged regularly. Storage should be between –20°C and +60°C, ideally not exceeding +30°C.
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