Rechargeable 4V Battery 2fm4 4v4ah 20hr For Electronic Scale Small Device

Rechargeable 2fm4 4v4ah 20hr Battery For Electronic Scale Small Device

Product Overview

4V4Ah lead-acid battery is a low-voltage, small-capacity rechargeable maintenance free storage battery. It's widely used for electronic scale,emergency lighting and other small devices or scenarios with low power supply requirements and low power consumption.

Key Features

tructural and Specification Features

• Compact size: Suitable for installation in small devices with limited space.
• Cell composition: Internally consists of 2 series-connected cells. Each cell contains positive and negative plate groups.The plate grids are made of lead-calcium alloy (to reduce self-discharge).
• Sealed design: Maintenance-free sealed types, eliminating the need to add electrolyte, reducing the risk of leakage, and suitable for household or portable scenarios.

Performance Features

• Discharge characteristics: Suitable for continuous small-current discharge (e.g., 0.1-0.5A) with a stable discharge curve and slow voltage drop, providing stable power supply for devices.
• Charge-discharge cycle life: Approximately 200-300 cycles (can be extended to 500 cycles with shallow charge and discharge), lower than that of large-capacity lead-acid batteries, making it suitable for low-frequency use scenarios.
• Environmental adaptability: Operates within a relatively wide temperature range (-10°C to 40°C). Capacity decreases slightly at low temperatures but can still meet basic power supply needs; long-term exposure to high temperatures should be avoided to prevent electrolyte evaporation.

Advantages 

1.Compatibility with low-voltage, low-power devices

• The 4V voltage can directly match the circuit design of most small electronic devices (no need for complex voltage reduction modules), and the 4Ah capacity can meet the battery life requirements of low-power devices (such as electronic scales and small lamps), usually supporting them for days to weeks depending on device power consumption.

2,Low cost and high cost-effectiveness

• The plate materials (lead alloys) and production processes of lead-acid batteries are mature. The 4V4Ah model, due to its small capacity and simple structure, has low manufacturing costs and is much cheaper than lithium batteries of the same specification, making it suitable for low-cost device scenarios.

3.Convenient use and maintenance

• Maintenance-free models do not require regular water addition or electrolyte adjustment and can be used immediately after unpacking.
• Charging requirements are simple; they can be charged via ordinary low-voltage chargers (4.8V-5V) without complex protection circuits (such as overcharge and over-discharge protection for lithium batteries), reducing the threshold for use.

4.High safety and strong stability

• Chemically stable, with better overcharge and short-circuit resistance than some lithium batteries, making them suitable for scenarios with high safety requirements such as children's toys and household small appliances.
• The discharge voltage is stable, and it will not affect device accuracy (such as measuring instruments and small medical devices) due to power fluctuations.

Product and Packing