Ultra long cycle life and lightweight LiFePO4 12V 30Ah Battery for Oxygen Concentrators, Fish Finders ( Sonar Sounders) , Lawn Lights , Solar Street Lights
- 10x the life of traditional SLA batteries.
- 3x the durability of average lithium competitors.
- Near-zero maintenance costs for the next decade and a half.
- Safe & Stable: UL-listed cells and advanced thermal management.
- Rapid Recharge: 4x faster charging than SLA, ensuring zero-downtime for critical applications.
Flexible order quantity to support prototype testing and mass production.
Batteries certified to UL,CE,UN38.3,MSDS,ROHS,IEC62133 and more global standards.
Customized size,current, case and working temperature.
7-10 days quick delivery.
Top 12V 30Ah LiFePO4 Battery Manufacturers in China
A 12V 30Ah LiFePO4 battery is a type of rechargeable lithium iron phosphate battery, consisting of a total of four 30Ah prismatic cells in series and parallel to reach 12.8V nominal voltage and 30Ah nominal capacity. It’s a high performance lithium battery, designed primarily as a lightweight and smaller replacement for traditional 12V 30Ah Sealed Lead Acid (SLA) batteries.
12V 30Ah rechargeable lithium battery has a nominal voltage of 12.8V, cut-off voltage of 9V and maximum charge voltage of 14.6V.Compatible with most standard 12V electronics and chargers, the 12V 30Ah lithium battery is widely used in Oxygen Concentrators, Fish Finders ( Sonar Sounders) , Lawn Lights , Solar Street Lights.
| Parameter 1 | Value 1 | Parameter 2 | Value 2 |
|---|---|---|---|
| Nominal Voltage | 12.8V | Capacity | 30Ah |
| Energy | 384Wh | Discharge Cut-off Voltage | 8V |
| Max Charge Current | 30A | Max Discharge Current | 60A(≤5s) |
| Cycle Life | >3000 | Self-discharge Rate | 2% |
| Dimensions | 197 x 165 x 170mm | Weight | 3.8Kg |
| Operating Temperature | -20℃ to 60℃ | Storage Temperature | 0 to 25ºC |
| Protection | Overcharge, Overdischarge, Overcurrent / Short-Circuit, Temperature, Cell Balancing | ||
LiFePO4 Battery Advantage
- Ultra-Long Lifecycle: Over 3,000 deep cycles, lasting 10 times longer than traditional lead-acid batteries.
- Lightweight: Typically uses the standard SLA case size, but 1/3 weight of the traditional 12V 30Ah lead-acid battery.Drop-in replacement for alarm system and UPS units.
- Cost Per Cycle: Lifepo4 battery is only 1/4 cost of traditional lead acid battery in long run term.
- 100% Usable Capacity： Supports 100% DOD, delivering 40% more usable energy than equivalent lead-acid packs
- Smart BMS Protection： Integrated Smart BMS prevents overcharging and shorts, ensuring absolute safety for users.
- Eco-Friendly & Compliant ： Non-toxic, sustainable, and fully certified with CE, UN38.3, and RoHS standards.
Uncompromised Low-Charge Performance
Unlike standard batteries that fail under load when low on energy, VTCBATT maintains a powerful 28A discharge current even at low voltage (12.2V). This ensures your devices run smoothly until the very last amp-hour.
Lifepo4 battery Feature
Superior lifepo4 battery features only 3% self discharge rate per month. Ensure your equipment always ready to go even after several months of storage.Eliminate regular maintenance in water filling and acid check compared to traditional lead-acid batteries.
Lifepo4 battery is inherently safe chemistry against thermal runaway.
The integrated smart BMS can protect against extreme conditions to ensure ultimate safety for different power solutions.
The 12V lifepo4 battery adopts a modular design for flexible scalability.You can easily connect multiple 12V battery modules in series or parallel ,tailor made for your increasing power demand.
Why Choose VTCBATT?
VTCBATT not only focuses on customized design and excellent service to meet the diverse demands of different customers, but also devotes itself to precise and standardized manufacturing in every process to ensure the highest-quality batteries. Meanwhile, VTCBATT will provide comprehensive support from pre-sales to after-sales, focusing on customers’ feedback to establish long-term and win-win cooperation. VTCBATT professional sales and technical engineer teams will be your best custom battery experts to assist with reliable and fast services at any time.
From the raw materials mixing to the cell test, VTCBATT adopts an automatic manufacturing process to maximize production efficiency and enhance the batteries quality, safety, and reliability. The entire manufacturing process is monitored and 100% tested before flowing to the next procedure to ensure zero defects before delivery.
Over the past 20 years, VTCBATT has built strong partnerships with customers in more than 50 countries worldwide. With reliable quality, responsive service, and tailored battery solutions, we have earned the trust of our clients—many of whom have maintained long-term cooperation and lasting friendships with us for over a decade. Together, we continue to grow and move forward toward a brighter future.
Application
The VTCBATT LiFePO₄ (Lithium Iron Phosphate) battery is widely used in energy storage systems, electric mobility, backup power solutions, solar power systems, RVs, marine applications, and industrial equipment, where high safety, long cycle life, and stable power output are essential. With a modular and compact design, it is ideal for Oxygen Concentrators, Fish Finders ( Sonar Sounders) , Lawn Lights , Solar Street Lights.
This battery supports series and parallel configurations, with customized voltage, capacity, and intelligent BMS to precisely match your application requirements. Featuring excellent thermal stability, low internal resistance, deep cycle capability, and superior safety performance, the VTCBATT 12V 30Ah LiFePO₄ battery ensures efficient energy management, long service life, and reliable operation for both consumer and industrial applications.
The runtime of 12 volt 30Ah battery depends on the load device and battery chemistry.
-Battery Chemistry: A 12-volt battery 30Ah maintains 384Wh of total energy.
12V 30Ah AGM battery can only discharge 50% of the total energy, with an actual 180Wh usable power.
The 12V 30Ah LiFePO4 battery can discharge almost the full 384Wh at 100% depth of discharge.
-Power Load: The runtime is different for the same 12V 30Ah lithium battery to power different loads. It will power a 25W fish finder for 15 hours, while the runtime of a 45W car fridge is only 8.5hours.
For a 100W trolling motor application, a LiFePO4 12V 30Ah battery can last nearly 3.8 hours in 100% usable power in our field test. In contrast, a traditional 12V 30Ah lead-acid battery can only last 1.3 hours due to only 50% usable power.
12V 30Ah LiFePO4 Runtime VS Lead-Acid Runtime
| Application / Device | Power (Watts) | Current (Amps) | 12V 30Ah LiFePO4 Runtime (100% DOD) | 12V 30Ah Lead-Acid Runtime(50% DOD) |
| LED Camp Lights | 10W | 0.8A | ~38.4 Hours | ~19.0 Hours |
| CCTV / Security Camera | 15W | 1.2A | ~25.6 Hours | ~12.5 Hours |
| Fish Finder / GPS | 25W | 2.0A | ~15.0 Hours | ~7.5 Hours |
| CPAP Machine | 40W | 3.1A | ~9.5 Hours | ~4.5 Hours |
| Car Fridge (Compressor) | 45W | 3.5A | ~8.5 Hours | ~4.0 Hours |
| Laptop (via Inverter) | 60W | 4.7A | ~6.5 Hours | ~3.0 Hours |
| Trolling Motor (Low Speed) | 100W | 7.8A | ~3.8 Hours | ~1.3Hours |
| Electric Scooter / Toy Car | 150W | 11.7A | ~2.5 Hours | ~1.2 Hours |
There are many different battery chemistries for 12V 30Ah batteries, such as LiFepo4 battery, Li-ion battery, AGM, Gel, Flooded and Lead Carbon. Featuring the highest energy density, the 12V 30Ah Li-ion battery are the lightest ones. The 12V 30Ah Lifepo4 battery is more widely used for long cycle life and lightweight as direct replacement of lead acid battery.
12V 30Ah Battery Weight Comparison Table
| Battery Chemistry | Typical Weight (kg) | Typical Weight (lbs) | Weight Ratio (vs. Lithium) | Energy Density (Wh/kg) |
| LiFePO4 (Lithium) | 3.2 kg – 3.9 kg | 7.0 lbs – 8.6 lbs | 1x (Standard) | 90 – 120 |
| Li-ion (NMC) | 2.2 kg – 2.8 kg | 4.8 lbs – 6.1 lbs | ~0.7x (Lightest) | 150 – 230 |
| AGM (Lead-Acid) | 9.0 kg – 10.5 kg | 19.8 lbs – 23.1 lbs | ~3x Heavier | 30 – 50 |
| Gel (Lead-Acid) | 9.5 kg – 11.2 kg | 20.9 lbs – 24.7 lbs | ~3x Heavier | 30 – 45 |
| Flooded (Lead-Acid) | 10.5 kg – 12.5 kg | 23.1 lbs – 27.5 lbs | ~3.5x Heavier | 25 – 40 |
| Lead Carbon | 10.2 kg – 11.5 kg | 22.5 lbs – 25.4 lbs | ~3.2x Heavier | 35 – 55 |
The 12.8V 30Ah Lifepo4 battery stores total 384Wh (12.8VX30Ah) energy.
Unlike the lead acid battery, the 12.8V 30Ah LiFePO4 battery features 100% usable energy in 384Wh.
Usable Energy Comparison: LiFePO4 vs. Lead-Acid
| Metric | 12.8V 30Ah LiFePO4 | 12V 30Ah Lead-Acid (AGM/Gel) |
| Total Energy (Wh) | 384 Wh | 360 Wh |
| Recommended DoD | 80% – 100% | 50% |
| Practical Usable Energy | 307 Wh – 384 Wh | 180 Wh |
| Weight | ~3.5 kg | ~10 kg |
12v 30ah lifepo4 battery features 1C(30A) maximum continuous discharge current and 2C(60A) peak discharge current.
| Load Type | Current Limit | Duration / Effect |
| Standard Discharge | 6A – 15A (0.2C – 0.5C) | Ideal range for maximum cycle life (6,000+ cycles). |
| Max Continuous | 30A (1C) | The maximum steady load the BMS allows indefinitely. |
| Peak / Surge | 60A (2C) | Supported for 3–5 seconds (used for motor startups). |
| Continuous Power | ~384W | Calculated as 12.8V×30A. |
With 20 years of expertise, VTCBATT can custom-design the BMS to regulate different discharge current tailor-made for different applications.
It’s not recommended to use the 12V 30Ah lithium battery to start the outboard motor.
Outboard motor start requires 150A and 350A cranking amperage (CCA) to crank the engine.
But the normal 12V 30Ah lithium battery can only allow 60A peak discharge current, which can’t provide sufficient power to start the motor. The BMS will enter into overdischarge protection.
Deep Cycle vs. Cranking Lithium Batteries
| Feature | 12V 30Ah Deep Cycle Battery | 12V Lithium Cranking Battery |
| Primary Use | Fish finders, trolling motors, and LED lights. | Engine Ignition / Starting. |
| BMS Design | Safety-focused with strict current limits (1C). | High-pass-through for massive current surges. |
| Cell Type | Energy Cells (Optimized for runtime). | Power Cells (Optimized for instant burst). |
| Cranking Amps | Negligible (Not rated for CCA). | 150A – 350A+ CCA. |
The charging time for a 12V 30Ah lithium battery depends primarily on the charger’s output current (Amperage) and the battery’s Depth of Discharge (DOD).
Charge Time Table
Formula: Charging Time (hrs) = [Battery Capacity (Ah) / Charge Current (A)] × 1.2 (Efficiency Factor)
12V 30Ah Charging Time Table
| Charger Output (Amps) | Charging Type | Estimated Time (0-100%) | Recommended Use |
| 2A | Trickle / Maintenance | ~16.5 Hours | Best for battery longevity. |
| 5A | Slow Charge | ~6.5 Hours | Good for overnight charging. |
| 10A | Standard (0.3C) | ~3.5 Hours | Balanced speed for daily use. |
| 15A | Rapid (0.5C) | ~2.5 Hours | Maximum recommended daily rate. |
| 30A | Fast (1C) | ~1.1 Hours | Only if supported by the BMS. |
Note: The LiFePO4 battery uses CC/CV (Constant Current/Constant Voltage) charging stages. During the last 10% energy charging process, it will take a longer time for the BMS to balance each cell.
12V 30Ah LiFePO4 battery pack is composed of 4 cells in a series configuration.
The inconsistent cells have a major difference in the voltage and self-discharge rate.
There are many consequences of inconsistency, such as incomplete charge, reduced runtime, BMS overload, thermal stress, rapid degradation and cell swelling.
The Impact of Cell Inconsistency on 12V 30Ah (4S) Packs
| Feature | Consequence of Inconsistency | Technical Impact on 30Ah Pack |
| Charging Limit | Incomplete Charge | The highest voltage cell hits the 3.65V cut-off early, stopping the charger before the other 3 cells are full. |
| Discharge Limit | Reduced Runtime | The “weakest” cell hits the 2.5V low-voltage limit first, shutting down the battery even if the pack still has energy left. |
| BMS Balancing | BMS Overload | Standard BMS balancers (30–50mA) cannot keep up with large voltage gaps, leading to a permanent state of imbalance. |
| Heat Generation | Thermal Stress | Cells with higher internal resistance generate more heat during 30A discharge, accelerating the ageing of the entire pack. |
| Cycle Life | Rapid Degradation | Instead of 6,000+ cycles, an unbalanced pack may fail in under 500 cycles due to repeated stress on the outlier cells. |
| Safety Risk | Cell Swelling | In extreme cases, a cell forced into deep over-discharge or over-charge can swell, compromising the battery case integrity. |
As the leading battery manufacturer in China for 20 years, VTCBATT adopts a strict cell match standard to optimise the battery performance and extend the cycle life.
VTCBATT 12V 30Ah (4S) Cell Matching Standards
| Parameter | Matching Tolerance | Standard Value (Ref) | Why It Matters |
| Static Voltage | ≤ 5mV (0.005V) | 3.285V – 3.290V | Prevents BMS from triggering premature overcharge/discharge protection. |
| Internal Resistance | ≤ 1mΩ | 1.5mΩ– 2.5mΩ | Ensures even heat distribution and prevents “hot spots” during high 30A discharge. |
| Capacity | ≤ 10mAh | 30,100mAh – 30,110mAh | Eliminates the “Barrel Effect” so the user gets the full 30Ah usable energy. |
| Batch Source | Strictly Same Batch | Same Production Date | Ensures identical chemical ageing and self-discharge rates over 10 years. |
Yes. 12V 30Ah LiFePO4 battery is safe for indoor UPS and medical use.
-The integrated smart BMS will monitor the battery status accurately to protect against overcharge,overdischarge, overtemperature, overcurrent and short circuit.
-Lifepo4 battery is an inherently safe chemistry with good thermal stability up to 270℃ high temperature.
– Lifepo4 battery is non-toxic and environmentally friendly, excluding toxic acid and hydrogen gas.
-Composed of olive crystal structure, its bond is extremely solid to prevent oxygen release during puncturing.
-Enclosed with flame-retardant ABS case at UL94-V0 rate.
Why LiFePO4 is the Safest Choice for Indoor Use?
| Feature | Safety Benefit | Other Chemistry Comparision |
| Smart BMS | Overcharge, overdischarge, overtemperature, overcurrent and short circuit. | AGM.Lead acid is not included in the BMS. |
| Thermal Stability | Good stability. Hold up to 270℃ high temperature. | NMC lithium ion battery can only hold up to 150℃ high temperature. |
| Non-Toxic | No toxic acid and hydrogen gas. | Lead and acid included. Vent hydrogen gas when discharged. |
| Chemical Structure | Olive crystal structure.Solid to prevent oxygen release during puncturing. | In case of failure, cobalt-based lithium releases oxygen to fuel the fire. |
| Enclosure | Flame Retardant. UL94-V0 rated ABS plastic cases. | Melt easily at non-rated case. |
Correct storage and maintenance are important to prevent the battery from overdischarging.
Follow the steps below to store and maintain your 12V 30Ah battery well during the off-season.
-Step 1:Disconnect the battery from the load. Otherwise, the battery will be drained to 0V.
-Step 2:Charge to 13.1V-13.2V voltage and maintain at 50%-60% SOC stage.
-Step 3: Store the battery at 10°C to 25°C.
-Step 4: Regularly check the voltage every 6 months to keep the 13.1V-13.2V voltage range.
-Step 5: Clean the battery terminal regularly to avoid corrosion.
-Step 6: Charge to 100% to optimise the performance after storage.
12V 30Ah LiFePO4 Maintenance & Storage Table
| Category | Action Item | Technical Specification | Importance / Reason |
| Isolation | Physical Disconnection | Remove (+) and (-) terminal cables | Prevents “parasitic loads” from draining the battery to 0V during storage. |
| Charge Level | Set SOC to 50% – 60% | 13.1V – 13.2V (Resting) | The ideal chemical stability point to prevent cell stress and capacity loss. |
| Environment | Temperature Control | 10°C to 25°C (50°F – 77°F) | Cool, dry storage slows down the natural self-discharge rate. |
| Regular Check | Semi-Annual Voltage Inspection | Every 6 Months | Ensures the internal BMS hasn’t entered “Deep Sleep” or protection mode. |
| Cleaning | Terminal Inspection | Clean with a dry cloth | Prevents dust accumulation or corrosion that can increase resistance. |
| Re-Activation | Pre-Season Charging | Charge to 100% | “Wakes up” the chemical ions and balances the cells before first use. |
After long storage, 12volt 30Ah battery with a low SOC will be in overdischarge protection and have no output. This is caused by the continuous self-discharge current consumption in 2%-3% per month.
-Self Discharge: Even during storage, the 30Ah 12V batteries and their internal BMS are still self-consuming energy at 2%-3% rate per month; Charge the battery every 6 months.
-BMS Protection: A low SOC battery can be easily overdischarged during long storage.
The BMS protects against overdischarge and causes a 0V output.
Solutions to wake up a 0V battery:
-Use Smart Charger with 0V charging function: Use the smart charger supporting 0V charging. In case of overdischarged protection with 0V output, the smart charger can still activate the BMS to recover normal charging.
-Parallel Jump Connection: Connect with a good 12V 30Ah battery in parallel for 15-60 seconds. The BMS will be triggered by a surge current to recover the battery.
-Press Soft Reset Button: Press the physical reset button for 10 seconds to reset the BMS status. The Bluetooth App can also reset the BMS and recover the battery remotely.
Rest Button Picture:
Featuring a modular design, VTCBATT 12V 30Ah batteries can be connected in series to reach a 48V system. It can also be connected in parallel to reach a higher capacity system.
12V 30Ah LiFePO4 Battery Configuration Table
| Configuration | Wiring Setup | System Voltage (V) | System Capacity (Ah) | Total Energy (Wh) | Recommended Applications |
| Single Unit | Standard | 12.8V | 30Ah | 384Wh | Fish finders, Kayaks, LED lighting. |
| 2 Series (2S) | (+) to (-) | 25.6V | 30Ah | 768Wh | 24V Industrial tools, Electric wheelchairs. |
| 4 Series (4S) | (+) to (-) | 51.2V | 30Ah | 1,536Wh | 48V Inverters, Telecom backup power. |
| 2 Parallel (2P) | (+) to (+), (-) to (-) | 12.8V | 60Ah | 768Wh | Extended 12V runtime for camping. |
| 4 Parallel (4P) | (+) to (+), (-) to (-) | 12.8V | 120Ah | 1,536Wh | RV House batteries, Off-grid solar. |
| 2S / 2P | Mixed Group | 25.6V | 60Ah | 1,536Wh | Marine trolling motors (24V). |
| 4S / 4P | Mixed Group | 51.2V | 120Ah | 6,144Wh | Small-scale Home Energy Storage (ESS). |
Professional Installation Guidelines:
– Use the same batteries from the same batch.
-Use the same wiring cable in length and thickness.
-Before connecting, fully charge each battery to 100% using the same charger.
-Test all the batteries to make sure their start voltage are at the same voltage level.
Following the diagram for parallel and series wiring.
Temperature affects the 30Ah lithium battery charge and discharge performance a lot.
(1)The 12V 30Ah lithium battery can support discharge temperature range from -20℃ to 65℃.
But the discharge performance varies in different temperatures.
– Low Temperature Discharge (< 0℃)
The electrolyte becomes more viscous, and internal resistance increases. There will be an obvious voltage drop and 30%-40% capacity loss at- 20℃. You can only get 18Ah-21Ah from the 12V 30Ah lithium battery.
–Ideal Operating Temperature(15℃ to 35℃)
During this temperature range, the battery electrolyte is stable and internal resistance remains low. The battery can keep a steady voltage around 12V-13V and discharge the full 30Ah capacity.
-High Temperature Discharge (>45℃)
The high temperature will accelerate the movement of lithium ions, causing a slight 2% capacity increase to 30.6Ah. High temperature will also significantly reduce the cycle life of the LiFePO4 battery.
Discharge Capacity vs. Temperature Table
Model:12V 30Ah Lifepo4 Battery
| Temperature | Usable Capacity (%) | Usable Energy (Wh) | Performance Impact |
| −20℃ (Extreme Cold) | 65% | ~250 Wh | Significant voltage sag; high resistance. |
| 0℃ (Freezing) | 85% | ~326 Wh | Reduced runtime; recommended for light loads. |
| 25℃ (Optimal) | 100% | 384 Wh | Peak performance and maximum life. |
| 55℃ (High Heat) | 102% | ~392 Wh | Increased ageing; BMS thermal monitoring is active. |
(2)Lifepo4 battery should be charged from 0℃ to 45℃. Charging in freezing temperatures can cause Lithium Plating and internal short circuits. Take the battery to a warm environment and let the temperature rise above 5°C to charge.
| Temperature | Usable Capacity | Charging Action |
| -20°C | 65% | STOP. Do not charge. |
| below 0°C | 85% | DANGER. Charging will damage cells. |
| 25°C | 100% | OPTIMAL. Standard charging. |
| 55°C | 102% | MONITOR. BMS may cut off for safety. |
Reminder: Use the smart charger ,which can sense the outside temperature to avoid subzero charging.
12V 30Ah means the voltage is 12V and the capacity is 30Ah.
– 12V (Voltage): It means the nominal output voltage is 12.8V. The steady voltage output range is from 12.0V to 13.0V, which is compatible with standard 12V electronics and chargers.
– 30Ah (Capacity): It means the battery can store 30 Amp-hours of electricity. Theoretically, the battery can deliver 1 Amp of current for 30 hours or 30 Amps for 1 hour.
– LiFePO4: The chemistry (Lithium Iron Phosphate) is known for being the safest and most durable type of lithium-ion battery.
| Feature | 12V 30Ah Lead-Acid (AGM/SLA) | 12V 30Ah LiFePO4 (VTCBATT) |
| Usable Capacity | ~15Ah (50% depth of discharge recommended) | 30Ah (100% usable capacity) |
| Weight | ~9.0 kg (20 lbs) | ~3.5 kg (7.7 lbs) |
| Cycle Life | 300 – 500 Cycles | 3,000 – 6,000+ Cycles |
| Voltage Stability | Drops significantly under load | Flat & Steady (Stays at ~12.8V) |
| Charging Speed | 8 – 10 Hours (Slow) | 1 – 3 Hours (Fast Charge) |
| Efficiency | ~75% (Energy lost as heat) | >95% (Highly efficient) |
| Maintenance | Requires venting / Terminal cleaning | Zero Maintenance |
| BMS Protection | None (Vulnerable to over-discharge) | Smart BMS (Overcharge,overdischarge,overcurrent,overtemperature,short circuit) |
Green: Charging curve · Purple: Discharging curve
