- Stock: In Stock
- Model: NS-175-12-40A
- Dimensions: 150.00mm x 86.00mm x 98.00mm
- SKU: 4064
The TERRAVOLT™ 12V 17.5Ah is a locally assembled, high-performance lithium-ion battery designed for those who demand reliable power on the go. Whether you're powering a kayak, a solar setup, or portable electronics, this battery offers exceptional capacity, safety, and longevity. With its robust 3S7P (3 series, 7 parallel) configuration of premium 21, -18650 Lithium Ion battery cells each with a capacity of 2500mAH; and an integrated 40A Battery Management System (BMS), the TERRAVOLT delivers consistent, worry-free energy for a wide range of applications. Rated at a nominal 11.1V (commonly labeled as 12V), it is a versatile and powerful drop-in replacement for traditional lead-acid batteries.
Why Choose TERRAVOLT™ ?
Experience the Power of Reliable Energy! The TERRAVOLT™ 12V 17.5Ah is not just a battery; it's a reliable power solution built with precision and care. By choosing this battery, you are supporting local assembly and quality craftsmanship. Our batteries undergo rigorous testing to ensure they meet the highest standards of safety and performance, providing you with a durable and cost-effective energy source.
How Long Can This Powerful Battery Last?
LED String Lights (Decorative Outdoor Lighting)
Power consumption: 10 watts (typical for 20m of warm white LED string lights)
Connection: Direct 12V DC (no inverter loss)
Runtime calculation:
Over 18 hours of continuous festive lighting – enough for two full nights of patio parties.
Solar Street Light (All‑in‑one unit with LED & controller)
Power consumption: 30 watts (typical for a small solar street lamp running from dusk to dawn)
Connection: Direct DC via solar charge controller (efficiency ~95%)
Runtime calculation:
Approx: ≈6 hours of street lighting – perfect for areas requiring evening illumination (6 pm to midnight). For all‑night operation, pair with a small solar panel to recharge during the day.
Portable 12V Fridge / Cooler
Power consumption: 45 watts (typical compressor‑based 12V fridge, e.g., 40‑50L capacity, running 33% duty cycle)
Average draw over time: 15 watts (because the compressor cycles on/off)
Connection: Direct 12V DC (cigarette plug)
Runtime calculation:
Over 12 hours of fridge operation – keep food and drinks cold during a full day road trip or overnight camping.
Computer UPS (500W PSU)
Many people assume a 500W PSU always draws 500W, but that’s the maximum rating. A typical home or office computer (with monitor, router, and a few peripherals) draws far less during normal use.
Actual system power draw: 150 watts (typical for a desktop PC with an LCD monitor, Wi‑Fi router, and small speakers – measured at the wall).
Connection method: Battery → 12V DC to 120V/230V AC pure sine wave inverter (85% efficiency) → computer PSU Inverter + PSU combined efficiency: ~80% (0.8)
Usable energy after losses:
Runtime calculation:
Approx: ≈1 hour of backup power for your computer setup – enough time to save work, shut down safely, or ride through short power outages.
Note: The TERRAVOLT battery’s 40A maximum discharge limits the continuous power output to approximately 
(before inverter losses). A 500W PSU at full load would be borderline; we recommend keeping sustained load under 400W for safe and efficient operation.
UPS Application Notes:
- Best for: Short power interruptions, brownouts, or providing time to safely shut down a PC.
- Not a replacement for a full‑house generator – but perfect for home offices, small servers, or CCTV recording stations.
- Recommended inverter: 300W–500W pure sine wave (not modified sine wave) to avoid damage to sensitive computer power supplies.
- Automatic switching: Pair with an automatic transfer switch (ATS) or a UPS‑ready inverter for seamless backup.
Key Features
- High Energy Density: Compact and lightweight, the TERRAVOLT offers 194.25Wh of energy in a small form factor, providing more power per kilogram than traditional sealed lead-acid batteries.
- Integrated 40A BMS: The built-in BMS actively protects against overcharge, over-discharge, overcurrent, and short circuits, ensuring both battery longevity and user safety.
- Deep Cycle Capability: Engineered for deep discharge applications, it can be discharged down to 80% Depth of Discharge (DOD) without significant degradation, making it ideal for regular, heavy use.
- Long Cycle Life: Built with high-quality cells, the TERRAVOLT delivers over 500 cycles while maintaining more than 80% of its original capacity.
- Wide Operating Temperature: Performs reliably in harsh conditions, with a discharge range of -20°C to +60°C and a charge range of 0°C to +55°C.
- Locally Assembled: Supporting local craftsmanship and ensuring rigorous quality control.
Technical Specifications
Parameter | Value |
Nominal Voltage | 11.1V (12V) |
Nominal Capacity | 17.5Ah (17,500mAh) |
Total Energy | 194.25Wh |
Configuration | 3S7P (21 cells) |
Cell Type | 18650 Lithium-ion (3.7V, 2500mAh each) |
Max. Discharge Current | 40A (limited by BMS) |
Max. Charge Current | 20A (limited by BMS) |
Charge Voltage | 12.6V - 13.6V (CC/CV) |
Cycle Life | ≥ 500 cycles @ 80% DOD |
Charge Temperature | 0°C to +55°C |
Discharge Temperature | -20°C to +60°C |
Storage Temperature | -25°C to +65°C |
Dimensions (Approx.) | 130mm x 75mm x 40mm |
Weight (Approx.) | 1.3kg |
Performance & Durability
- Consistent Power Delivery: The battery's high-quality cells ensure stable voltage output even under heavy load, providing reliable power for your devices.
- Low Self-Discharge: When not in use, the TERRAVOLT battery retains its charge for extended periods, with a self-discharge rate of less than 3% per month, ensuring it's ready when you need it.
- Robust Construction: The battery is assembled in a durable, heat-resistant ABS plastic case, with all internal cells securely mounted to withstand vibrations and shocks.
Applications
The TERRAVOLT 12V 17.5Ah lithium-ion battery is versatile enough to power a wide range of devices and systems. Below is an extended list of real-world applications:
- Street Lighting – Ideal for solar-powered street lamps, garden lights, and pathway illumination. The battery stores solar energy during the day and powers LED luminaires at night, with deep-cycle capability for year-round reliability.
- String Lighting – Perfect for decorative LED string lights used in patios, events, weddings, or camping sites. Run beautiful ambient lighting for hours on a single charge.
- Marine & Kayak – Lightweight and waterproof-case ready, it powers fish finders, GPS units, VHF radios, and bilge pumps on small boats and kayaks.
- Solar Power Systems – Excellent for off‑grid solar setups: cabins, tiny homes, RVs, or remote monitoring stations. Stores excess solar energy for night or cloudy days.
- Portable Electronics – Run portable refrigerators (12V coolers), CPAP machines (with DC adapter), fans, LED work lights, and phone/laptop chargers during camping, road trips, or power outages.
- Electric Vehicles – Powers electric scooters, electric wheelchairs, golf carts, and kid’s ride‑on cars. High discharge current (40A) supports motors up to ~480W.
- Backup Power – Keep security systems, Wi‑Fi routers, CCTV cameras, alarm panels, and emergency radios running during grid failures.
- Home Automation & IoT – Provides stable 12V for smart sensors, gate openers, irrigation controllers, and weather stations in remote locations.
- Audio & Video Equipment – Runs portable PA systems, busker amplifiers, car audio test benches, or field monitors for film crews.
- DIY Projects & Robotics – Perfect for Arduino/ESP32 projects, line‑following robots, automated plant watering systems, or any 12V‑based prototype.
- Emergency Lighting – Dedicated backup for exit signs, emergency stairwell lights, or temporary construction site lighting.
Tip for street lighting: Pair the TERRAVOLT battery with a 12.6V solar charge controller (PWM or MPPT) and a 30‑50W solar panel for a complete, autonomous lighting system.
Safety Features
- Battery Management System (BMS): The 40A BMS is the brain of the battery, actively monitoring and protecting against overcharge (4.25V per cell), over-discharge (2.5V per cell), overcurrent, and short circuits. This multi-layered protection significantly reduces the risk of battery failure, fire, or damage.
- Cell Balancing: The BMS includes a passive balancing function, which ensures all cells in the pack are kept at an equal voltage, maximizing the overall pack's lifespan and performance.
- Flame-Retardant Casing: The battery is enclosed in a durable, flame-retardant ABS plastic case, providing a first line of defense against external hazards.
- Anti-Drop Technology: This product is coated with strong anti-drop chemical material, protecting your battery from moving around during extreme use. Anti-Drop technology can serve a fall of up to 1M. Note: Reckless use of this battery might trigger serious fire and/or explosion and could ultimately cause damage. Please handle batteries with care!
