The Weida 12V 9Ah Rechargeable Sealed Lead Acid (SLA) AGM Battery (HX12-9 / 12V 9.0Ah / 20HR) is a high-performance, maintenance-free valve-regulated lead-acid (VRLA) battery engineered for reliable standby power backup, cyclic discharging, and high-rate power delivery. Utilizing advanced Absorbent Glass Mat (AGM) technology with heavy-duty lead-calcium-tin alloy grids, it provides low internal resistance, minimal self-discharge, and high energy density. Sealed in a leak-proof, non-spillable high-impact ABS plastic casing with standard Faston F2 (0.250" / 6.35 mm) slide-on terminals, it operates dependably in any orientation. The Weida HX12-9 is widely utilized in uninterruptible power supplies (UPS), emergency backup lighting, CCTV security systems, solar power storage, fire alarm panels, automated gate motors, electric ride-on toys, and medical equipment.

Specifications

• Brand / Series: Weida Battery (HX Series - High-Performance VRLA/AGM)
• Model / Part Number: HX12-9 (12V 9Ah / 20HR)
• Battery Chemistry / Type: Valve Regulated Sealed Lead Acid (VRLA / AGM)
• Nominal Rated Voltage: 12.0 V DC (6 cells per battery)
• Rated Capacity:
  • 20-Hour Rate (0.45 A to 10.5 V): 9.0 Ah
  • 10-Hour Rate (0.84 A to 10.5 V): 8.4 Ah
  • 5-Hour Rate (1.53 A to 10.2 V): 7.65 Ah
  • 1-Hour Rate (5.4 A to 9.6 V): 5.4 Ah
• Internal Resistance: Approx. 18 mΩ to 20 mΩ (Fully charged at 25°C)
• Terminal Type: Faston Tab F2 (0.250 inch / 6.35 mm wide spade terminals)
• Maximum Discharge Current: Up to 135 A (5 seconds max.)
• Charging Voltages (at 25°C):
  • Standby / Float Use: 13.60 V to 13.80 V DC (-18 mV/°C temperature compensation)
  • Cycle / Boost Use: 14.40 V to 15.00 V DC (-30 mV/°C temperature compensation)
• Maximum Initial Charging Current: ≤ 2.7 A (Recommended standard charging current: 0.9 A to 1.8 A)
• Self-Discharge Rate: ≤ 3% of capacity per month at 25°C (Can be stored up to 6 months before freshening charge is required)
• Operating Temperature Ranges:
  • Discharge: -20°C to +60°C
  • Charge: -10°C to +50°C
  • Storage: -20°C to +50°C
  • Nominal Operating Temperature: 25°C ± 3°C
• Container & Cover Material: High-Impact Flame-Retardant ABS Plastic (UL 94-HB / UL 94-V0 optional)
• Physical Dimensions:
  • Length (L): Approx. 151 mm (5.94 inches)
  • Width (W): Approx. 65 mm (2.56 inches)
  • Container Height (H): Approx. 94 mm (3.70 inches)
  • Total Height with Terminals (TH): Approx. 100 mm (3.94 inches)
• Net Weight: Approx. 2.50 kg to 2.65 kg (5.5 lbs to 5.8 lbs)

Features

• High-Density AGM Technology: Ultra-thin glass fiber separators completely absorb the sulfuric acid electrolyte, preventing leaks, acid mist escape, and localized dry-out.
• Completely Sealed & Maintenance-Free: Recombination reaction efficiency reaches 99%, eliminating the need for periodic distilled water replenishment.
• Multi-Position Operation: Non-spillable construction allows safe installation and operation vertically or on either side without risk of leakage (avoid charging in an inverted position).
• High Surge Current Capability: Low internal impedance allows the battery to deliver high instantaneous currents required by UPS inverter starts and motorized gate opening.
• Low Self-Discharge Rate: Premium lead-calcium-tin grids maintain charge state during extended standby, ensuring readiness during unexpected mains outages.
• Standard Drop-In Replacement: Shares the standard footprint of classic 12V 7Ah / 7.2Ah / 7.5Ah / 8Ah batteries while delivering up to 25% longer runtime.

Common Applications

• Uninterruptible Power Supplies (UPS): Extended-runtime backup battery replacement for desktop UPS units (APC, Prolink, Santak, Eaton).
• Security & Alarm Systems: Central control panels, fire alarms, smoke detection panels, and burglar alarm power backups.
• CCTV Surveillance Systems: DC backup buffer for security DVRs, NVRs, and multi-camera power boxes during power cuts.
• Electric Ride-On Toys & Scooters: Power source for kids' 12V ride-on cars, mini electric buggies, and electric scooters.
• Automated Gate & Garage Openers: Standby battery backup for sliding/swing gate motors and electronic roller doors.
• Emergency & Solar Lighting: Off-grid 12V solar lanterns, street lamps, exit signs, and marine navigation aids.

Usage Tips

• Proper Charging Voltage Settings:
  • For Continuous Standby / UPS Buffer: Set the float charge voltage to 13.6V – 13.8V.
  • For Cyclic Daily Charging (Solar, Toys, Mobile Carts): Set the charger absorption voltage to 14.4V – 14.8V and limit initial charging current to ≤ 2.7A.
• Avoid Deep Discharging: Discharging the battery below 10.5V (1.75V/cell) causes severe lead sulfation on the plates, which permanently degrades capacity. Recharge immediately after deep-discharge events.
• Terminal Connections (Faston F2): The HX12-9 uses wide 6.35 mm (F2) spade terminals. If your equipment wiring utilizes narrower 4.75 mm (F1) female connectors, use standard F1-to-F2 terminal adapter clips or replace the crimp connectors with 6.3 mm insulated female spade terminals.
• Storage & Freshening Charge: If storing the battery for long periods, keep it in a cool, dry area at 20°C–25°C. Recharge the battery fully every 4 to 6 months to offset natural self-discharge and prevent sulfation build-up.
• Series / Parallel Wiring Best Practices: When pairing multiple batteries in series (for 24V/36V/48V arrays) or in parallel (for higher Ah capacity), always use batteries of the same model, age, capacity, and charge level to maintain balanced cell performance.