Gold Member Since 2009
Audited Supplier
OptimumNano Energy Co., Ltd.

LiFePO4 Battery, 12V Engine Start Battery, Lithium Battery manufacturer / supplier in China, offering 12V 40ah LiFePO4 Battery for Engine Starting, Wo-Power Box Rechargeable 7.2kwh Powerwall Energy Storage System, Wo-Power Box 7.2kwh Scalable Core Battery Energy Storage System Ess and so on.

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12V 40ah LiFePO4 Battery for Engine Starting

Purchase Qty.:
1-9,999 10,000+
FOB Unit Price: US $11,000 US $1
Purchase Qty. (Pieces) FOB Unit Price
1-9,999 US $11,000
10,000+ US $1
Get Latest Price
Production Capacity: 50000PCS/Day
Transport Package: 4pks/CTN
Payment Terms: L/C, T/T, Paypal, Western Union

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Basic Info
  • Model NO.: OPT1240
  • Charging Type: Electric Charger
  • Voltage: 12V
  • Size: 190*165*175mm
  • Trademark: optimum
  • Origin: Cn
  • Type: Lithium Ion Battery Charger
  • Principle: Half-Bridge Charger
  • Capacity: 40ah
  • Weight: About 5.5kg
  • Specification: UL CE
  • HS Code: 85078020
Product Description
1. Safe: The safest lithium battery so far, with CE, UL approved.
2. Environmental-friendly: All of our lithium battery approved RoHS.
3. Powerful: Able to discharge with 20C.
4. Long cycle life: Lithium battery have over 2000 cycles with capacity staying at 80% min.
5. No memory effect: The lithium battery are always ready for charge and use.
6. Wide temperature range: -4F~158F


1. Specialized in production of lithium battery for over 7 years.

2. Providing tailor-made high standard lithium battery energy solutions in accordance to client's demands.

3. With technical experience of over two years in on-site installation and debugging for more than 1000 HEV and EV.

4. Having made and implemented lithium battery energy solutions for over 100 styles of EV.

5. Whole journey nanny service after lithium battery saled.


1. Optimumnano Power Lithium Battery:
Mainly used for large EV, light EV, boats, planes, small medical instruments as well as portable apparatures.

2. Optimumnano Energy-storage Lithium Battery:
For PV/Wind power generation, peak-load adjustment, power station distribution, communication base station, UPS, military, etc.

Our service:

1. Your inquiry related to our lithium battery or prices will be replied in 24hrs

2. Well-trained and experienced staffs to answer all your enquires in fluent English

3. OEM&ODM, any your customized lithium battery we can help you to design and put into product

4. Distributoership are offered for your unique design and some our current models

5. Protection of your sales area, ideas of design and all your private information

6. Lithium Battery lead time: 15-25 days after order confirmed

7. Shipping freight are quoted under your requests

8. Shipping port: Shenzhen, Mainland China

9. Discounts are offered based on order quantities

10. MOQ: 1 PK lithium battery are accepted.


General Parameter


IFR 32750-5Ah

Casing material for single cell

Nickel plated steel

Standard capacity(0.2C3A)


Mininum Capacity(1C3A)


Rated voltage


Max.Charge voltage


Cut-off voltage


Standard charge current


charging Time


Max Continuous discharge current


Peak discharge current

400 A

Battery dimension


Total weight(Approx.)

About 7kg

Impedance(Max, at 1000Hz.)

≤   32mΩ

Charge method (CC/CV)






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Miss Cicada Ma
Sales Engineer
To: Miss Cicada Ma

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