battery 12v-4.5A Chinese

Description

The 12V 4.5Ah battery is a very popular, compact Sealed Lead-Acid (SLA) battery, standard in the industry for mid-range backup power needs. Like the smaller 4V models, these are almost exclusively manufactured using AGM (Absorbent Glass Mat) technology, making them leak-proof and maintenance-free.

Technical Specifications

• Nominal Voltage: 12V

• Nominal Capacity: 4.5Ah (4500mAh)

• Dimensions: Typically ~90mm x 70mm x 101mm (Standard footprint for these capacities).

• Terminal Type: Usually F1 (0.187″ tab) or F2 (0.250″ tab) quick-disconnect terminals.

• Chemistry: Lead-Acid (VRLA/AGM)

Key Features

• Maintenance-Free: The electrolyte is absorbed within the fiberglass mats, so no water refilling is ever required.

• High Discharge Capability: Capable of delivering reliable power for short-duration high-load situations (like UPS startup).

• Versatile Orientation: Due to the sealed design, it can be mounted on its side or end without risk of leakage.

• Shock & Vibration Resistant: The internal construction is designed to withstand typical mechanical stress in portable equipment.

Common Applications

This specific size is a “workhorse” for many small-to-medium electronic systems:

• UPS Systems: Often found in the smaller battery backup units for PCs and home routers.

• Alarm Systems: Primary or secondary backup battery for residential and commercial security panels.

• Emergency Lighting: Used in exit signs and portable emergency floodlights.

• Kids’ Electric Ride-On Toys: Frequently used as the power source for smaller ride-on cars or motorcycles.

• Medical Equipment: Used in portable monitors or diagnostic devices requiring stable 12V power.

Maintenance & Longevity Tips

Important: The most common cause of premature failure in these batteries is “undercharging” or leaving them in a discharged state.

• Float Charging: If using this for a standby application (like an alarm), ensure your charger maintains a float voltage of roughly 13.5V to 13.8V.

• Cycling: If using this for a toy or portable device, recharge it immediately after every use. Do not let it sit empty, or the internal lead plates will suffer from “sulfation,” which permanently reduces the capacity.

• Temperature: Keep these away from extreme heat (e.g., inside a car on a summer day). Excessive heat drastically reduces the lifespan of lead-acid batteries.

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