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12.8V 40Ah LiFePO4 Battery Replace GEL/AGM DL-LFP-RP1240

  • 12.8V 40Ah LiFePO4 Battery
  • ≥6500 Times Deep Cycle
  • Outdoor Camping Backup Battery
  • Alternative Lead Acid / Gel / AGM Batteries
  • Light Weight and Easy To Carry
  • Brand: Delong Energy
  • Sample: Available For Test
  • Service: 10 Years Warranty
  • Support: OEM, ODM, OBM, Customized
  • Certificates: CE, UL, MSDS, IEC, UN38.3, ISO, etc.
  • Price: Click The Button Below To Get A Discount Price.


12.8V 40Ah LiFePO4 Battery DL-LFP-RP1240

The dimensions of the 12.8V 40Ah lithium iron phosphate battery are 181*76*170mm, and it weighs only 2.2kg, yet it can provide 512Wh of energy. Its compact size and light weight are paired with a high energy density, which makes it extremely versatile in application.

Application: Replaceable GEL/AGM; Toy Car; 12V Equipment etc.

It can power the lights in a caravan, allowing all the equipment in the motorhome to operate normally. Whether you are camping outdoors, hosting an event, or even during a power outage at home, the 12V 40Ah battery is ready to be put to use.

Moreover, this practical and portable backup power source can support various electronic devices such as weed cutters, electric saws, sound systems, communication equipment, mobile medical apparatus, and security systems.

12V lifepo4 Battery Application

12V lifepo4 Battery Application

Advantages Of 12V 40Ah Lithium Battery

In addition to being widely used, the 12V 40Ah battery also has the following advantages:

Long service life:

Unlike lead-acid batteries, the 12V 40Ah lithium battery can be used for up to 12 years, capable of completing 6,500 charging and discharging cycles. Moreover, we provide you with a 10-year post-sale quality warranty.

12V Battery Parameter Graph

12V Battery Parameter Graph

Using A-grade battery cells:

Why does Delong dare to offer a 10-year warranty period? This is because all our lithium batteries use A-grade lithium iron phosphate cells from well-known manufacturers, such as BYD. Lithium iron phosphate is known for its stability and can provide you with 100% safety.

Low self-discharge rate:

The power consumption of lithium iron phosphate batteries is slow, and even if you don’t use it often and let it sit idle in the corner, it can maintain as much energy as possible.


This advantage should be clear to you even if it’s not explicitly stated. Lithium batteries that don’t require regular watering truly reduce a lot of hassle and save much time.

Waterproof Battery:

The housing of the 12V 40Ah lithium battery is made of ABS+PC material, which provides an IP55 level of waterproofing capability.

Bluetooth & Heating

If you wish to further free up your hands and feet, you can also add Bluetooth capability. An app on your phone allows you to monitor the battery’s working status in real time. If you find yourself in a cold area, you can opt for the self-heating feature as well. This self-heating function raises the surrounding temperature to a range where the battery can deliver its optimal performance.

Custom Battery Services

In addition to these additional features, our customization service can tailor the voltage and capacity specifically for your device. From 6V, 12V, 24V, 36V, 48V, 72V to 96V — these are all parameters with which our engineers are highly familiar.

About DelongTop

If you need to purchase a 12V lithium battery, there are many factors to consider, including the manufacturer’s capability and integrity. Delong is one of the reliable suppliers. We were established in 2012 and have been dedicated to the lithium battery industry ever since. Our own factory offers the most competitive prices and the most reliable quality, with three advanced production lines to ensure timely delivery! You are welcome to communicate with us at any time.

Delong Energy Factory

Delong Energy Factory

Technical Data

Model DL-LFP-RP1240
Product Specification 12V 40Ah
Nominal Voltage 12.8V
Nominal Capacity 40Ah
Battery Energy 512Wh
Max Charge Current 20A
Charging Cut-off Voltage 14.6V±0.2V
Max Discharge Current 40A
Discharging Cut-off Voltage 9.2V±0.2V
Cell Type LiFePO4 Battery
Display /
Terminal M6
Case Material ABS+PC
Waterproof Level IP55
Charge Temperature Range 0~45
Discharge Temperature Range -5~55
Cycle Life ≥6500 Cycles
Designed Life 12 Years
Colour Black
Weight 2.2Kg
Dimensions (LxWxH) 181*76*170mm
Assembly Method Built In

PDF Download

12.8V 40Ah LiFePO4 Battery PDF Download


1. Is Delong Energy a lithium battery factory?
Delong Energy is a battery factory with 11 years of experience, which integrates research, development, production, and sales.

2. How about the quality of lithium battery products from Delong Energy?
Delong Energy has a strong R&D team and a set of international certifications, including MSDS, UN38.3, FCC, IEC62133, CE, UL, KC, BIS, CB, ROHS, and ISO9001:2015 certified.

3. Can you do An OEM/ODM project?
We have engineers who can help you design and R&D any related products.

4. Can you customize the battery pack for more function?
Yes, we have a professional engineering team to provide an excellent solution for you.

5. Do you have MOQ?
No limited.

6. Can I have samples to test? And what is the lead time for a sample order?
Yes, we can supply samples. The lead time for samples is 3-5 days. The buyer pays for the sample cost and shipping cost.

7. What is your term of payment?
We adopt T/T, Paypal, Alibaba payment way, Credit Card, Visa, Echecking, Master Card, Trade Assurance, etc.

8. Do you provide after-sales service?
Yes, the battery warranty is 10 years. If there are any quality problems on our side in this period, we can send a new one as a replacement.


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