battery 4v-1.2A Chinese

Description

The 4V 1.2Ah battery is a slightly higher-capacity version of the 4V 0.8Ah battery. Like its counterpart, it is a sealed lead-acid (SLA) battery commonly manufactured in China, utilizing AGM (Absorbent Glass Mat) technology to ensure it is maintenance-free and spill-proof.

Technical Specifications

• Nominal Voltage: 4V

• Nominal Capacity: 1.2Ah (1200mAh)

• Dimensions: These are typically slightly larger than the 0.8Ah version to accommodate the extra plate area required for the higher capacity.

• Chemistry: Lead-Acid (VRLA/AGM)

• Terminals: Usually features “Faston” type quick-connect tabs (typically 4.75mm wide).

Key Features

• Increased Runtime: With 1200mAh, this battery provides roughly 50% more runtime than the 800mAh (0.8Ah) version under the same load.

• Sealed Construction: Operates in any position and is safe for use in consumer appliances.

• High Power Density: Provides a reliable power supply for small motors and high-intensity LEDs.

• Durability: Designed to withstand the vibration and environmental stress common in portable handheld devices.

Primary Applications

Due to its slightly larger capacity, this battery is chosen for devices that need to run longer or support slightly higher power draws:

• Rechargeable Lanterns & Handheld Searchlights: Often used in multi-LED professional work lights.

• Emergency Power Supplies: Backup power for small security sensors or emergency exit signs.

• Professional/Industrial Electronic Scales: Used to maintain portability for digital weight scales.

• Toys & Hobbies: Powering motorized hobby toys or remote-controlled units that require more sustained energy.

Comparison: 0.8Ah vs. 1.2Ah

Important Maintenance Advice

1. Charging Voltage: The charging voltage for these batteries is critical. Typically, they require a “float” charge voltage of approximately 4.6V to 4.8V. Using a standard 5V USB charger without a proper charge controller circuit will likely damage the battery and cause it to swell.

2. Avoid “Deep Cycling”: These batteries are not designed to be drained to 0V. If a device stops working, turn it off immediately to prevent permanent damage to the lead plates.

3. Storage: Always store these batteries in a fully charged state. If they are left discharged for even a few weeks, “sulfation” occurs, which significantly reduces the battery’s future capacity.