12V 35Ah Battery
We recommend this 12V 35Ah Lithium Iron Phosphate (LiFePO4) battery, especially if you’re looking for better performance and long-term value. Think of it as the next generation of power technology, designed to be a superior upgrade to those old AGM and Gel batteries.
You buy it once, and it will last you many, many years without the cost and hassle of frequent replacements. In actual use, LiFePO4 batteries with the same nominal 35Ah often provide longer runtimes.
It really is a more modern and smarter choice for your 12V 35Ah battery needs.
12V 35Ah Lithium Battery Specs
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Work Voltage Range 10.8~14.6V
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Nominal Voltage 12.8V
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Nominal Capacity 35Ah
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Rated Energy 460.8Wh
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Max Discharge Power 460.8W
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Standard Charge Current 7A
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Recommend Charge Current ≤18A
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Max Charge Current 36A
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Recommend Discharge Current ≤36A
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Max Continue Discharge Current 40A
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Peak Discharge Current (10S) 80A
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Resistance ≤25mΩ
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Lifespan (25℃,0.5C,80%DOD) >6000
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Waterproof IP65
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Weight 4.2Kg
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Size (Length * Width * Thick) 195*130*154mm
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Terminal M5
Why choose 12V 35Ah deep cycle battery instead of AGM/Gel
In short, lithium iron phosphate represents a more advanced technology that can bring you real benefits. Let’s compare them in detail and you will understand:
So you see, although lithium iron phosphate batteries are more expensive when you first buy them, overall, their ultra-long life, light weight, high efficiency, high available capacity and maintenance-free characteristics make them surpass traditional AGM and Gel batteries in terms of long-term cost, performance and ease of use. This is indeed a worthwhile upgrade investment.
| eature | LiFePO4 (Lithium Iron Phosphate) | AGM / Gel (Lead-Acid) | What This Means for You |
|---|---|---|---|
| Lifespan (Cycle Life) | 2,000 – 5,000+ cycles | 200 – 700 cycles | Significantly longer life, lower long-term cost (TCO), far fewer replacements. |
| Weight | Significantly Lighter (~50%+ lighter) | Heavier | Easier handling, improved portability, better vehicle performance/efficiency. |
| Usable Capacity (DoD) | High (80-100% safe discharge) | Lower (≤ 50% recommended discharge) | More actual usable energy for the same Ah rating, longer runtime. |
| Efficiency (Round-Trip) | High (typically >95%) | Lower (approx. 80-85%) | Less energy wasted during charge/discharge, more efficient power usage. |
| Charging Speed | Can be faster (requires compatible charger) | Slower | Reduced charging time (when using the correct LiFePO4 charger). |
| Maintenance | Zero Maintenance / Maintenance-Free | Minimal / None (Gel is maintenance-free) | Hassle-free operation, no regular upkeep needed. |
| Safety | High (Stable chemistry + Built-in BMS) | Generally Safe (but potential acid leaks / hydrogen gassing) | Greater peace of mind, multiple built-in safety protections (BMS). |
| Environmental Impact | More Eco-Friendly (No heavy metal lead) | Contains Lead (Requires careful recycling) | Better for the environment. |
| Initial Cost | Higher | Lower | Consider Total Cost of Ownership (TCO) – LiFePO4 is often more economical long-term. |
Ideal applications for 12v 35ah U1 deep cycle battery
In most applications where 12V 35Ah AGM or Gel lead-acid batteries are currently used, this LiFePo4 battery can be used as a direct, all-round performance-enhanced replacement. It is commonly used in wheelchairs, lawn mowers, marine, mobility scooters, RVs, small solar energy storage systems, and UPS etc.
12V 35Ah rechargeable battery selection & replacement guide
When you consider replacing your old battery with this LFP battery, you need to consider the following points to ensure that the replacement goes smoothly and that you can fully utilize the advantages of the new battery.
- Confirm that the physical dimensions and interfaces match. Our 12V 35Ah lithium iron phosphate battery is designed with easy replacement in mind. Its shell size and the type and position of the electrode posts (i.e. the wiring terminals) are usually made to the same standards as AGM or Gel lead-acid batteries of the same specifications. We call this ‘Drop-in Replacement’.
- You must use a charger designed for lithium iron phosphate (LiFePO4) to charge this battery. Never use an old lead-acid charger. The voltage and method of charging are different.
- This lithium iron phosphate battery has an intelligent brain inside, BMS (Battery Management System). This is a standard configuration of lithium iron phosphate batteries and is also the key to its safety and reliability. It can prevent overcharging, over-discharging, and short circuit protection.
FAQs for universal 12V 35Ah battery
The life of a 12V 35Ah battery depends on the load and the depth of discharge.
For example, if you power a fan with 84W, it can run for about 5 hours.
12V * 35Ah / 84W = 5H.
The time to fully charge a 12V 35Ah battery depends on the power of the charger.
If you use a 2A charger, it may take 15 hours to fully charge.
Physically, yes in many cases. Our LiFePO4 batteries are usually designed to be the same size and interface as AGM/Gel batteries of the same specification, making them a direct replacement.
It is a little more expensive in the short term, but it is definitely worth it in the long term. This is mainly because it has a much longer lifespan, which can be used 3 to 5 times or even longer than AGM/Gel. This means you don't have to replace the battery frequently, saving money and trouble. In addition, it is lighter, has more actual usable power, and is maintenance-free. All in all, the cost-effectiveness is very high, and it is a more cost-effective long-term investment.
Battery life: With the same capacity (for example, both are 35Ah), LiFePO4 can actually use more power (because it can be deeply discharged), so it usually has a longer battery life.
Charging time: With a dedicated charger, LiFePO4 is generally faster than AGM/Gel.
Lifespan: This is its biggest advantage. AGM/Gel may last for two or three years, while LiFePO4 can easily reach 5, 8 or even more than 10 years under normal use, and the number of cycles is several times that of lead-acid.
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