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UG LAND INDIA

4S 40A 14.8V 16.8V 18650 Charger Li-ion Lithium Battery Protection Board PCB BMS Lipo Cell Module

4S 40A 14.8V 16.8V 18650 Charger Li-ion Lithium Battery Protection Board PCB BMS Lipo Cell Module

₹ 105.00
₹ 105.00
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  • 10 Days Returnable
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  • On Time Delivery
  • Worldwide Order Delivery
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Specification:

Parameter Details
Battery Type Li-ion / LiPo (18650 or similar)
Configuration 4S (4 cells in series)
Nominal Voltage 14.8V
Maximum Charge Voltage 16.8V (4.2V × 4 cells)
Rated Charge Current 20A (recommended), max 40A
Rated Discharge Current 40A (continuous), peak 60A
Overcharge Detection Voltage 4.25V ± 0.05V
Overcharge Release Voltage 4.15V ± 0.05V
Over-discharge Detection 2.8V ± 0.1V
Over-discharge Release 3.0V ± 0.1V
Overcurrent Protection 50A–60A (typical)
Short Circuit Protection Yes, auto recovery or manual reset
Balancing Function Yes (passive balancing to equalize cell voltages)
Balance Start Voltage ~4.2V per cell
Internal Resistance < 100 mΩ
Temperature Protection No (unless external module is added)
Board Dimensions Approx. 65mm × 45mm × 8mm
Connector Type 5-pin JST or solder pads for cell connections
Application E-bikes, scooters, tools, solar storage, DIY packs

 

Features:

  • Designed for 4-cell lithium-ion or lithium-polymer packs.

  • Supports up to 40A continuous discharge current.

  • Integrated over-voltage, under-voltage, overcurrent, and short circuit protection.

  • Passive cell balancing to equalize cell voltages during charging.

  • Compact size and high efficiency for space-constrained applications.

  • Helps extend battery life and ensures operational safety.

Description:

The 4S 40A BMS (Battery Management System) Protection Board is an advanced circuit designed to manage and protect 4-series (4S) 18650 lithium-ion or LiPo batteries. This protection board ensures the safe and efficient operation of battery packs by preventing common battery issues such as overcharging, over-discharging, overcurrent draw, and short circuits, which can damage cells and reduce their lifespan.

With support for up to 40A of continuous discharge current, this BMS is suitable for medium- to high-drain applications including e-bikes, hoverboards, power tools, electric scooters, solar energy storage systems, and custom DIY battery projects. The module is capable of managing both charging and discharging cycles effectively and provides automatic recovery once abnormal conditions are resolved.

This 4S BMS is equipped with passive balancing circuitry that activates when cell voltages reach near full charge (around 4.2V). This helps maintain uniform voltage across all cells, which enhances the efficiency, performance, and lifespan of the battery pack. It ensures that each cell charges evenly, reducing the risk of overvoltage in individual cells and improving overall pack safety.

Shipping & Returns

Return Policy According

• Order can be return within 10 days from date of delivery.

• Order return request cannot be accepted after 10 days from date of delivery.
• Return request window are available for only 10 days.
• After 10 days return window will closed and we cannot accepted any request.
• Customer will sent the order to seller by any courier.
• Customer will paid own of courier charges to seller warehouse.
             

Generate (RMT) Return Merchant Ticket

• Note : Take photo and upload. Condition of product. Enter Correct Name, Mobile, Email, Order id / Invoice number (any one ) you can enter. Select Payment mode

Cash On Delivery / Prepaid .
• After Submit Return Request within 12 - 24 hour receive (RMT) Return Merchant Ticket number to your registered mobile number and email id.
• When you receive (RMT) Return Merchant Ticket number then ship your return to our warehouse address by any courier.
• We will initiate refund after delivered your return order to our warehouse.
• For any query please call our helpline number +91-9999115521 or
  mail us support@uglandindia.com

Refund policy

Prepaid Customer

• Refund of the order will be initiated after receiving the product at the warehouse address

• You will receive a notification message or mail for confirmation, of receiving the product.

• Full order value amount will transfer to your bank account. Money will be credited 5-7 working days.
• Money will issue same day when confirmation will receive by message and mail.
• Refund will not issued if product is not the same as which orders are sent by us.
• We can provide reverse amount in the DISCOUNT coupon if the buyer wants and can apply coupon to purchase another or the same product. Money will deduct.
• Coupon validity available for 1 year.
• If return request receive after 10 days from the date of delivery. we will not issue refund.
 
Deduct Non Refundable Charges
• Refund money reverse to you only product amount and delivery charges
• Delivery charges will not refund in case order refuse delivery to accept order / Incorrect address mentioned
Order Cancellation Charges
Order cancellation charges will be deduct if in case your order is Picked up or handover to the courier department. Delivery charges will deduct.
Refund will reverse only product amount.

For any query, please Call/WhatsApp to our helpline number +91-9999115521/+91-9999115512

Any complaint or query also technical support mail us support@uglandindia.com
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  • About Shipping

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    • On time delivery at promising duration. Worldwide order dispatch all delivery location.
    • If your tracking number is no logistics information, as thousands of parcels sent to foreign countries, logistics companies did not update logistics information, please contact us the first time, Please kindly do not directly open the dispute. We are the first time for you to solve!
    • Time of shipment:
    • All of product we can shipping out within 3~5 weekday, on usually we are according to customer orders time for packing and shipment, we need to carefully check the quality of the goods before to Ship, So take some time to handled.
    • Time of delivery: Due to force majeure factors: hurricanes, rainstorms affect flights. Leading to logistics delays. We are honest sellers, will not let you suffer any loss. Please give the logistics company a little processing time, we wait for the package to reach your side.
    • If your logistics information arrives at the local post office: If the local post office does hasn't contact you, please contact your local post office as soon as possible to get your package. Otherwise, overtime receipt of parcels, the local post office will return your parcel, the consequences of self-responsibility.
    • Protection time is running out: When we have finished time of shipment, if the product protection period running out, please extend the product protection period by yourself or contact us, Please kindly don't open the dispute directly.

    Import duties:
    Taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. Import duties, taxes and charges are not included in the item price or Shipping charges. These charges are the buyer's responsibility

    • We committed 99% surely that we will shipped your order in same day if order is received from 4.00 pm after this time all order dispatched timely.

    • If order received on Saturday after 4.00pm and Sunday order so order will be picked up on Monday. Orders shipment working Monday to Saturday. Sunday are a closed courier.• 99% surely provide fast and timely delivery by these couriers FedEx , DELHIVERY, BLUEDART, ARAMEX, XPRESSBEES, DHL EXPRESS, DTDC, ECOM EXPRESS,• We can sent you by EMS speed post if area are not covered from other.

    • Our shipping partner provide to fast delivery as per committed time schedule.

    • We provide our customer satisfactory reliable and safe packaging product order at door delivery.• Ensure that your order reaches you in the fastest time and in good condition. Ship through reputed courier.• All order item will shipped together.• If you believe that the product is not in good condition, if the packaging is damaged with tempered, before accepting delivery of the goods. please refuse to take delivery of the package.• Click on Track your Order section or provide to your link by whatsapp. You can track the shipping status of your order on website

    Original Product Sent By Us With Our Packaging Material Tape If Packet Receive without our Company Logo During Delivery Time Please Do Not Accept