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A 4V 4Ah "balance battery" refers to a 4-volt, 4 Amp-hour (4000mAh) rechargeable battery, typically utilizing Sealed Lead Acid (SLA) or Absorbent Glass Mat (AGM) technology, specifically designed to power electronic weighing scales, balances, and low-voltage emergency equipment.
These batteries are known for their stable voltage output, maintenance-free operation, and compact design, often referred to as "2FM4" or 2FM4.5 models.
Key Specifications
- Voltage: 4 Volts (nominal).
- Capacity: 4 Amp-hours (4Ah or 4000mAh) at a 20-hour rate.
- Chemistry: Typically AGM/VRLA (Sealed Lead Acid), which are maintenance-free and spill-proof.
- Dimensions: Roughly 3.5 in × 1.9 in × 3.7 in (~90 × 48 × 94 mm).
- Weight: Approximately 1.5 lbs (0.7 kg) to 1.89 kg.
- Terminals: Usually F1 (0.187" tab) terminals.
- Charging Voltage: Float charge at ~4.50–4.60V; cycle charge at ~4.80–5.00V.
Primary Applications
- Electronic Scales/Balances: Used to provide consistent, stable power for precise weighing in industrial and commercial scales.
- Emergency Lighting: Powering exit signs and emergency lamps.
- Children’s Toy Cars: Rechargeable power for small ride-on vehicles.
- Alarm/Security Systems: Used in standby power modules.
- Portable Instruments: Powering small LED lights, fans, and medical monitoring devices.
Performance and Maintenance
- Runtime: Provides 4 hours of power at a 1A draw, or 1 hour at a 4A draw.
- Lifespan: Can last for 3–5 years or roughly 500+ cycles with proper care, though this varies based on usage and depth of discharge.
- Storage: To maintain longevity, charge at least once every 3 months when not in use.
Common cross-reference model numbers include NP4-4Ah, UB440, PS-440, and 2FM4.
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People also ask
What do balancing batteries do?
Balancing a multi-cell pack helps to maximize capacity and service life of the pack by working to maintain equivalent state-of-charge of every cell, to the degree possible given their different capacities, over the widest possible range. Balancing is only necessary for packs that contain more than one cell in series.
Battery balancing - Wikipedia
Wikipedia
https://en.wikipedia.org › wiki › Battery_balancing
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https://en.wikipedia.org › wiki › Battery_balancing
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Kaiying Power Supply & Electrical Equip Co., Ltd
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AliExpress
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Alibaba.com
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4 answers · 2 years ago
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4 answers · 2 years ago
It says 4v4ah/20hr on the battery and 6v 500mA on the charger. How long does it take to fully charge (since the scale didn't come with user ...Read more
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Why don’t you just plug it in until the light changes color indicating that it’s charged?
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