4V 1000mAh (1.0Ah) Rechargeable SMF Lead-Acid Battery

4V 1000mAh (1.0Ah) Rechargeable SMF Lead-Acid Battery is a Sealed Maintenance-Free (SMF) Valve-Regulated Lead-Acid (VRLA / AGM) rechargeable battery delivering a nominal 4.0V DC output and 1000 mAh (1.0Ah) capacity. Constructed with an Absorbed Glass Mat (AGM) electrolyte system sealed inside a high-impact, leak-proof ABS resin case, it operates in any orientation without acid spills or water refilling and is widely used in emergency LED lanterns, rechargeable study lamps, portable digital scales, and 4V backup circuits.

Key Features:

• Sealed Spill-Proof AGM Construction: Immobilized electrolyte in glass-fiber separators ensures 100% maintenance-free, leak-proof operation in vertical or horizontal mounting positions.
• Stable 4.0V 1000 mAh (1.0Ah) Output: Delivers dependable constant-voltage power with high surge current capability for motors, relays, and high-brightness LED arrays.
• Low Self-Discharge (<5% per Month): Holds charge for up to 6 months in room-temperature storage (25°C) when fully charged prior to storage.
• Simple Constant-Voltage Charging: Recharges easily from a standard 4.8V – 5.0V constant-voltage / current-limited DC supply or solar charge controller without complex multi-cell balancing.
• Rugged Impact-Resistant ABS Shell: Thick-walled ABS housing resists vibration and mechanical shock in mobile robotics and portable field equipment.

Technical Specifications:

• Battery Chemistry: Valve-Regulated Lead-Acid (VRLA / SMF / AGM)
• Nominal Voltage: 4.0V DC
• Rated Capacity (20-Hour Rate): 1000 mAh (1.0Ah)
• Cyclic Charging Voltage: 4.8V – 5.0V DC
• Standby / Float Charging Voltage: 4.5V – 4.6V DC
• Recommended Maximum Charging Current: 200mA – 250mA
• Self-Discharge Rate: < 5% per month at 25°C
• Operating Temperature Range: -15°C to +50°C

Mechanical Specifications:

• Case Material: High-Impact Flame-Retardant ABS Resin
• Terminal Type: Top Solder Tab Terminals
• Ventilation: Self-Resealing Low-Pressure Safety Relief Valve

Dimensions:

• Length: 65 mm
• Width: 35 mm
• Height: 40 mm
• Weight: ~145 g

Pinout and Wiring:

• Red Marked Terminal (+): Positive 4.0V DC battery output.
• Black Marked Terminal (-): Negative 0V DC ground terminal.
• Maintenance Tip: Charge the battery for 4–6 hours before first use and always recharge promptly after use; never leave a lead-acid battery stored in a fully discharged state, as sulfation will permanently reduce capacity.

Datasheet Reference:

• Cell Architecture: 2.0V-per-Cell Series Absorbed Glass Mat (AGM) Lead-Acid Monoblock

Commonly Used in:

• Emergency LED Lanterns, Torch Lights, and Solar Lamps
• Electronic Weighing Scales & Retail Cash Registers
• Wired & Wireless Robotics Competition Chassis
• Security Alarm Panels, Access Control, and UPS Backup

Applications:

• Specifically designed for emergency LED lanterns, rechargeable study lamps, portable digital scales, and 4V backup circuits.
• Provides a rugged, forgiving rechargeable power source for student robotics and solar energy experiments.
• Drops directly into commercial emergency lights, weighing scales, and backup enclosures as an OEM replacement battery.

Equivalent Models:

• 4V / 6V / 12V SMF Lead-Acid Series: Choose 4V (0.5Ah/1Ah/2Ah), 6V (1.3Ah), or 12V (1.3Ah) to match your system voltage.
• DMEGC INR18650-26E 3.7V 2600mAh Li-Ion Rechargeable Battery: Lightweight lithium-ion alternative when lower weight is required.

Package Includes:

• 1 × 4V 1000mAh (1.0Ah) Rechargeable SMF Lead-Acid Battery