★

4.9/5 Rating Rated by 800+ Customers on Google

✓

Genuine Products Quality checked before dispatch

⚡

Fast Dispatch Orders processed quickly

🚚

Pan India Delivery Trusted courier partners

🛠

Built for Makers Robotics • Electronics • DIY

🎓

Student Friendly Perfect for projects & learning

🚀

Startup India Recognized Recognized startup company

🏬

Physical + Online Store Visit us in Pimpri or shop online

📦

Secure Packaging Your components packed with care

★

4.9/5 Rating Rated by 800+ Customers on Google

✓

Genuine Products Quality checked before dispatch

⚡

Fast Dispatch Orders processed quickly

🚚

Pan India Delivery Trusted courier partners

🛠

Built for Makers Robotics • Electronics • DIY

🎓

Student Friendly Perfect for projects & learning

🚀

Startup India Recognized Recognized startup company

🏬

Physical + Online Store Visit us in Pimpri or shop online

📦

Secure Packaging Your components packed with care

4V 1Ah Sealed Lead Acid (SLA) Rechargeable Battery for Handheld Flashlights and DIY Projects

Component	Specification
Chemistry	Sealed Lead Acid (SLA)
Nominal Voltage	4.0V
Capacity	1.0Ah (1000mAh)
Full Charge Voltage	4.5V – 4.6V
Terminal Type	Solder Tabs / Flat Leads
Housing Material	Impact-Resistant ABS

Price

🚚 Ships within 24 Hours
📦 Pan India Delivery

₹ 38.14

(Tax included)

Barcode: 4845

Product Description The 4V 1Ah Sealed Lead Acid battery is an ultra-compact, maintenance-free power source commonly found in small rechargeable household electronics. Designed specifically for low-voltage, portable applications, this 1000mAh cell provides a steady energy discharge for small LED torches, emergency lamps, and miniature motorized gadgets. Its sealed construction ensures it is spill-proof and can be operated in various positions, making it a rugged alternative to delicate battery packs in demanding DIY environments.

Key Features

Compact Form Factor: Specifically sized for small handheld devices where space is limited.
Stable 4V Output: Ideal for driving 3V-3.4V white LEDs with minimal power loss through resistors.
Spill-Proof & Maintenance-Free: No need to refill electrolytes; safe for portable use in any orientation.
Durable ABS Case: Engineered to withstand physical vibrations and minor impacts.
Low Self-Discharge: Retains its charge effectively over months of inactivity compared to older Ni-Cd cells.

Technical Details

Dimensions: Approx. 30mm x 22mm x 65mm (Standard 4V 1Ah footprint)
Standard Charge Current: 100mA (0.1C)
Max Charge Voltage: 4.8V
Cycle Life: 200–300 Charge/Discharge cycles
Operating Temperature: -10°C to +50°C
Weight: Approx. 80g to 100g

Prototyping and Engineering Tips from Robogears

Charging Requirements: To avoid "gassing" or swelling the casing, do not charge this battery with a standard 5V USB power supply directly. Use a regulated charging circuit set to a maximum of 4.5V–4.6V. A constant current of 100mA is recommended for a healthy, slow charge.
LED Flashlight Builds: This battery is the perfect voltage for 0.5W or 1W "Straw Hat" LEDs. Because the battery voltage (4V) is so close to the LED forward voltage (~3.2V), you only need a small 4.7\Omega$ to 10\Omega$ resistor to limit current, making the circuit very efficient.
Deep Discharge Warning: Lead-acid batteries do not like being "run dry." If the voltage drops below 3.5V, charge it immediately. Leaving it at 0V for even a few days can cause "sulfation," which permanently reduces the battery's capacity.
Soldering Leads: When attaching wires to the tabs, use a hot iron and work quickly (under 3 seconds). Excessive heat conducted through the terminals can damage the internal lead-to-plate seals and lead to premature failure.

Package Includes

1 x 4V 1Ah Sealed Lead Acid (SLA) Rechargeable Battery

Disclaimer

Images are for reference; actual dimensions or casing color may vary by batch. Specifications subject to change by manufacturer. This product contains lead; please dispose of it responsibly at an e-waste or battery recycling center.