Ultra long cycle life and lightweight Lifepo4 12V 8Ah battery for Intrusion Alarm Control Panels, Backup Power Supply, Emergency Exit 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 8Ah LiFePO4 Battery Manufacturers in China
A 12V 8Ah LiFePO4 battery is a type of rechargeable lithium iron phosphate battery, consisting of a total of eight 26700 or 26650 cells in series and parallel to reach 12.8V nominal voltage and 8Ah nominal capacity. It’s a high performance lithium battery, designed primarily as a lightweight and smaller replacement for traditional 12V 8Ah Sealed Lead Acid (SLA) batteries.
12V 8Ah 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 8Ah lithium battery is widely used in security,fire safety,emergency,utility,medical devices,industrial & agricultural tools,leisure & consumer.
| Parameter 1 | Value 1 | Parameter 2 | Value 2 |
|---|---|---|---|
| Nominal Voltage | 12V | Capacity | 8Ah |
| Energy | 89.6Wh | Discharge Cut-off Voltage | 8V |
| Max Charge Current | 8A | Max Discharge Current | 14A(≤5s) |
| Cycle Life | >3000 | Self-discharge Rate | 2% |
| Dimensions | 151 x 65 x 94/100mm | Weight | 1.0Kg |
| 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 8Ah 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.
Lifepo4 battery technics
The chart data may vary slightly. For detailed test data, please contact our engineering team.
Lifepo4 battery Feature
Superior lifepo4 battery features only 2% 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 Intrusion Alarm Control Panels, Backup Power Supply, Emergency Exit 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 8Ah LiFePO₄ battery ensures efficient energy management, long service life, and reliable operation for both consumer and industrial applications.
The charging time for a 12V 8Ah 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)
| Charge Current (A) | Charging Type | Estimated Time | Recommended Scenario |
| 0.8A | Trickle Charge (C/10) | 10 – 12 Hours | Best for maximizing battery cycle life. |
| 1.0A | Standard Charge | 8 – 10 Hours | Ideal for security & backup power maintenance. |
| 2.0A | Moderate Charge | 4.5 – 5.5 Hours | Balanced speed; suitable for medical devices. |
| 4.0A | Rapid Charge | 2.5 – 3 Hours | Only for high-performance LiFePO4 or fast-charge cells. |
Warm Tips for charging the 12V 8Ah battery packs.
- Current Limits: A maximum charging current of 2.4A (0.3C) is recommended for long-term health. A higher charge current will shorten the battery cycle life. Consult the manufacturer of the 12V 8Ah battery in case of a higher charge current.
- Temperature Control: The optimal charging ambient temperature is 20°C – 25°C. NEVER charge Lithium batteries in temperatures below 0°C (32°F) unless they are equipped with an internal heating system or manufacturers clearly specified for low temperature charging.
Smart Termination: Always use a smart charger with automatic cut-off (Taper Current or -∆V) to prevent overcharging, which can lead to swelling or thermal risks.
The runtime of 12V 8Ah battery depends on the load device and battery chemistry.
- Battery Chemistry: Generally, a 12V 8Ah battery provides 96Wh of total energy.
A lead-acid 12V 8Ah battery can only discharge 50% of the total energy, with actual 48Wh.
The Lifepo4 12V 8Ah battery can discharge almost 100% of the total energy with 96Wh.
- Power Load: For a 10W load, a LiFePO4 12V 8Ah battery can last nearly 9 hours in 100% discharge depth. In contrast, a traditional 12V 8Ah lead-acid battery can only last 4.5 hours with a maximum 50% depth of discharge.
Estimated Runtime Table In Different Applications
| Device Power (Watts) | Example Device | Runtime (Lead-Acid) | Runtime (VTCBATT Lithium) |
| 2W | Industrial Sensor / IoT Gateway | 24 Hours | 43 Hours |
| 5W | Small LED Emergency Light | 9.6 Hours | 17 Hours |
| 10W | CCTV Camera / Security Panel | 4.8 Hours | 8.6 Hours |
| 20W | Portable Medical Monitor | 2.4 Hours | 4.3 Hours |
| 50W | Small Inverter / Power Tool | 58 Minutes | 1.7 Hours |
Before charging 12V 8Ah battery, it’s critical to identify the battery chemistry, the correct profile charger and charger terminal.
–Match the Chemistry: Use a LiFePO4 charger for lithium batteries ( charge voltage 14.4V-14.6V) or a multi-stage charger with a float mode for lead-acid (SLA/AGM). Never use a lead-acid charger to charge a lithium battery.
-Use the Right Current: Use 0.1C to 0.2C standard charge current for best lifespan! Set at a maximum 2.4A safe charge current. Consult the battery manufacturer for higher discharge current!
–Use correct charger terminal: 12V 8Ah batteries are normally provided with Faston (blade-type) terminals, categorized as F1 or F2. Ask the battery supplier to provide a pair of F1-to-F2 jumpers/adapters can increase the versatility of your product.
| Feature | F1 Terminal (No. 187) | F2 Terminal (No. 250) |
| Width | 4.75 mm (3/16 inch) | 6.35 mm (1/4 inch) |
| Appearance | Slimmer/Narrower | Wider/Broader |
| Common Apps | Alarm systems, Emergency lights | UPS, high-current electric toys |
| Current Capacity | Standard | Higher (larger contact surface) |
F1-to-F2 jumpers
Or use a charger with alligator clips or crocodile clips directly, which can charge both F1 and F2 terminals.
12V 8Ah means the voltage is 12V and the capacity is 8Ah.
– 12V (Voltage): The nominal voltage is 12.8V with steady voltage output at 12.0V-13.0V, making it compatible with standard 12V electronics and chargers.
– 8Ah (Capacity): Stands for 8 Amp-hours, meaning it can theoretically deliver 1 Amp of current for 8 hours or 8 Amps for 1 hour.
– LiFePO4: The chemistry (Lithium Iron Phosphate) is known for being the safest and most durable type of lithium-ion battery.
Use a multimeter to conduct a quick test of a 12V 8Ah battery.
-Visual Inspection: Observe the appearance of the battery case for any cracks or swelling. Use alligator clips securely attached to the F1/F2 terminals.
-Voltage Check: Test the voltage by using a digital multimeter. Normally, the 12V 8Ah LiFePO4 unit should read between 13.4V and 14.6V.
-Discharge Testing: Discharge at a constant current at 1.6A (0.2C) to verify the battery’s capacity. The full 8Ah capacity battery can last 5 hours before hitting the 10.0V cutoff.
– Internal Resistance: For high-stakes applications like medical or security, ensure the AC internal resistance is below 30mΩ for optimal power delivery.
12V 8Ah Battery Voltage Reference Chart
| Battery Status | LiFePO4 (Lithium) Voltage | SLA (Lead-Acid) Voltage |
| 100% Fully Charged | 13.4V – 14.6V | 12.6V – 12.8V |
| ~50% Capacity | 13.1V – 13.2V | 12.2V – 12.4V |
| ~20% Low Battery | 12.8V – 12.9V | 11.8V – 12.0V |
| Discharged / Requires Charge | < 10.5V (BMS Protection may trigger) | < 10.5V (Battery may be damaged) |
Before choosing the right size solar panel, you need to consider the 0.3C charge current limit, battery chemistry, and slightly over-size the power panel. A 12V 8Ah battery only has a total of 96Wh of energy. If you use too large solar panel to charge the battery, the battery will be damaged. It will also incur unnecessary costs for the solar panel.
A 20W Solar Panel paired with a 10A PWM Solar Controller is highly recommended to charge the 12V 8Ah LiFePO4 battery. This setup provides a safe, steady charge that can fully replenish the battery in about 7–9 hours of direct sunlight, ensuring long-term health and 6,000+ cycles of performance.
| Panel Size | Charging Current (Approx.) | Time to Charge (0-100%) | Best Use Case |
| 10W | 0.5A – 0.6A | ~15–18 Hours | Maintenance / Slow “Trickle” charging. |
| 20W | 1.1A – 1.2A | ~8–10 Hours | Ideal for daily use. Charges in one sunny day. |
| 50W | 2.8A – 3.0A | ~3–4 Hours | Fast charging (Requires a high-quality Controller). |
VTCBATT 12V 8Ah batteries can support max 4pcs in series and max 4pcs in parallel.
It means that it can reach max 48V voltage and max 32Ah for increasing power demand.
Warm Tips: Use the same batteries from the same batch. 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, extending the battery bank cycle life and optimize performance.
Never mix old batteries with new batteries. A battery bank is only as strong as its weakest individual battery. The mixture of old and new batteries will force the new battery to over-compensate for the old one’s high resistance. This results in reduced runtime, uneven charging, and can significantly shorten the lifespan of your new investment.
While a balancer is optional for light-duty applications, we recommend it for unattended systems (like remote security nodes) and to prevent the ‘Weakest Link’ effect and ensure the system remains maintenance-free for years. For industrial-grade applications, the extra cost of battery balancer is a very small part of the total battery bank failure cost.
Since the battery balancer will increase the total cost of the battery bank, you must meet the following standards. Then you don’t need to use a battery balancer.
-High Consistency: All the batteries are in high consistency from the same brand, model, and from the same production batch.
-Initial Alignment: Before connecting in series and parallel, each battery must be individually charged to 100% Full to reach the same initial start voltage.
-Low Intensity: The application is very light, and maximum lifespan is not a critical requirement.
-Manual Balancing: Disconnect the batteries and manually fully charge them individually every year before reconnecting.
Don’t connect both positive and negative leads to the first battery! This will result in uneven charge and discharge, causing the first battery drain itself quickly.
Use the Diagonal Wiring below:
- Connect the Positive (+) lead of your device to the first 12V 8Ah battery in the bank.
- Connect the Negative (-) lead to the last 12V 8Ah battery in the bank.
This method balances the resistance across all units, ensuring equal current distribution and preventing the ‘Weakest Link’ effect. In great consistency, a Lifepo4 battery bank can last for 10 years and get the best return on total cost.
You can charge the whole bank with one charger, which should be in correct charge voltage.
– 12V Parallel Banks:
You can use a single 12V LiFePO4 charger, but the charger’s charge current should be sufficient for the total capacity. For 12V 32Ah battery bank with four 12V 8Ah batteries in parallel, use 14.6V 6A to 10A charger to maintain reasonable charging times.”
-24V,36V,48V Series Banks:
You must use a charger that matches the total 24V,36V, or 48V system voltage. For 24V 8Ah battery bank with two 12V 8Ah batteries in series, a 29.2V voltage charger is required. For a 48V 8Ah battery bank with four 12V 8Ah batteries in series, a 58.4V charger is required. Using a mismatched charger will fail to charge or trigger the BMS protection.”
Yes. Connecting in parallel can increase the max discharge current of the total battery bank. The table below gives clear values for the increased current in different 12V 8Ah setup configurations.
Parallel Connection: Max Discharge Current Table (12V 8Ah)
| Setup Configuration | Total Voltage | Total Capacity | Max Continuous Discharge (Theoretical) | Recommended Max Discharge (Safety Margin) |
| 1x Battery | 12.8V | 8Ah | 8A | 7A |
| 2x Parallel (2P) | 12.8V | 16Ah | 16A | 14A |
| 3x Parallel (3P) | 12.8V | 24Ah | 24A | 21A |
| 4x Parallel (4P) | 12.8V | 32Ah | 32A | 28A |
(Remark: Assume the battery can allow 1C(8A) continuous discharge current.)
Important Technical Considerations
- The 80% Safety Rule: Theoretically, two 12V 8Ah batteries in parallel can draw max 16A current. For safety considerations, it is recommended to only discharge max 12.8A or 14.4A current in 80%-90% principle during actual usage.The battery with more cable resistance will carry less load and force the other battery to carry more. As a result,it will make the BMS to shut down and cause a power failure.Cable Thickness (Gauge): When you increase current in parallel, you must use thicker main output cables. For a 48V 4P setup (28A-32A), your main cables must be rated for at least 10AWG to prevent overheating and voltage drop.
- High Consistency: Fully charge each battery before connecting in parallel. Make sure all batteries are charged to the same voltage (tolerance within 0.1V). A surge current will flow from a full battery to an empty battery, causing BMS damage.
