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Free shipping lipo charger module BMS Board 4S 40A 18650 Li-ion Lithium Battery charger

  • 20-49 Pieces
  • 50-99 Pieces
  • 100-499 Pieces
  • >=500 Pieces
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Shipping fee:
Depends on the order quantity.
Lead Time:
3 day(s) after payment received
Customized logo (Min. Order: 100 Pieces)
Customized packaging (Min. Order: 500 Pieces)


Graphic customization (Min. Order: 1000 Pieces) Less
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Quick Details
Model Number:
Brand Name:
Place of Origin:
Guangdong, China
2S 40A 18650 Li-ion Lithium Battery 7.4V 8.4V Charger Protection Board
Over charge voltage:
Over discharge voltage:
Continuous charging current:
Continuous discharge current:
Small Current:
less than 3uA
Life cycle:
more than 50000 hours
Less than 45m
Short cut protection:
Protectable,charge can repair
For DIY Project

Packaging & Delivery

Selling Units:
Single item
Single package size: 
5X2X1 cm
Single gross weight:
0.050 kg
Package Type:
Standard package
Picture Example:
Lead Time :
Quantity(Pieces) 1 - 100 101 - 300 301 - 1000 >1000
Est. Time(days) 3 4 5 To be negotiated

We Earned Plenty Experience For Customized ODM Order

Product Parameters

Free shipping lipo charger module BMS Board 4S 40A 18650 Li-ion Lithium Battery charger

1.Scope of application: Suitable for lithium batteries with a nominal voltage of 3.7V and a full voltage of 4.2V (Including 18650, 26650, polymer lithium batteries, no restrictions on the size) 

2.Product size: 45 * 55 * 3.4mm 

3.Charging voltage: 16.8V ~ 18.1V

4.Continuous discharge current (upper limit): 40A (if the heat dissipation environment is not good, please reduce the load current) 

5.Continuous charging current (upper limit): 20A 

6.Suitable for electric drills with starting current below 80A and power below 230W. 

Note 1: Successful start of electric drill requires 4 10C-20C power batteries, or 8 5C-10C power batteries

(recommended power battery models: SONY VTC4, VTC4A, VTC4A, VTC6), 0V and 12.6V connecting cables, Use copper wire of 3 mm squareor more (no nickel sheet !!).

Note 2: Connect 0V, 4.2V, 8.4V, 12.6V, 16.8V strictly according to the figure. When welding the wire, do not touch any components
on the board. Do not intentionally short circuit.

Note 3: When welding the battery for the first time or charging, as long as a single battery exceeds 4.2V, the "430" resistor will
heat up and discharge (discharge to about 4.19V to stop heating. If the "430" resistor is extremely hot (not hot enough) (Dare to touch), please check whether the wrong wire is connected.
Product Packaging
Our Company

Okystar Technology Co., Ltd is subsidiary of Okystar Technology Group Co., Ltd, which holds 4 subsidiary companies and more than 1500 skilled workers,50 technicians.Okystar Tech Co.,Ltd was built in 2004.We mainly manufacture and export 3D Printer, Board&shield, sensor module, Smart Car Robot, Smart DOF Robot, Servo, DIY toys ,Science toys, Mainboard,etc.
After years of development, our company has grown into a large high-tech group corporation integrating industry, technology and trading. With electronic information industry as our main business, we keep being top 10 in the board, shield, sensor, modules for arduino.

Our advantage:

1.More than 5,000,000 ownstock inventory to meet your needs of different products.

2.Competitive price advantage helps to save your purchase cost and your precious time.

3.Own the international advanced testing equipment of electronic components and scientific storage system to ensure the quality stability.

4.Excellent elite team, more than 8 years seniority, and a good understanding of international market trends.


1.Are you a manufacturer or trading company ?
Okystar is a directly manufacturing factory,and we have own export sales team.

2.Does your products can be ODM or OEM?
Yes,of course.OEM and OEM service are available from here.we can customize logo or packing as your request.

3.What's the warranty of your product?
1-2 years warranty according to different products.
1-3 months to replace new items for free.
About controller board module,we support 2 years warranty for free.

4.What is the terms of payment?
Money Gram,T/T,Paypal,Western Union,Alipay and L/C.
If you want to pay by Credit card,we suggest you to place order on Alibaba.

5.Do you have any technical support?
We have professional technological engineer,they will provide different tutorials and solutions.

6.Can i visit your company?
We welcome you to visit can choose it from our showroom directly.If you have any other product request,we can discuss it face to face.