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

$10.99
  Availability: In Stock
  Shipping: Free Airmail 
  Estimated Delivery: 
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  •   Shipping Methods

    Handling Time

    Before we can ship your order, we prepare your products, do strict quality-control tests and carefully package the items. The time it takes to prepare your items for shipping is separate from the delivery time. It usually takes 1-3 business days to ship out .

    Shipping Methods

    You can choose the preferred shipping method on the cart page during the checkout process. We offers 3 international shipping methods:

    1. Airmail – Free untracked economy shipping via national postal services (HK Post, Singapore Post, China Post, PostNL, Swiss Post, Sweden Post, USPS, Royal Mail e.t.c.)
    2. Airmail Registered – Tracked shipping via national postal services (HK Post, Singapore Post, China Post, PostNL, Swiss Post, Sweden Post, USPS, Royal Mail e.t.c.)
    3. Expedited Shipping – Express shipping with courier delivery (DHL, UPS, FedEx, TNT)

    Delivery Time

    Airmail and Airmail Registered Area Estimated Delivery Time
    United States, Canada 7-25 business days
    Australia, New Zealand, Singapore, United Arab Emirates 10-25 business days
    United Kingdom, France, Spain, Germany, Netherlands, Japan, Belgium, Denmark, Finland, Ireland, Norway, Portugal, Sweden, Switzerland 10-25 business days
    Italy, Brazil, Russia, South Africa 10-45 business days
    Other countries 10-35 business days
    Expedited Shipping 3-10 business days to Worldwide

    Note: If you choose an expedited shipping, please remember to leave a valid contact number, this is required for expedited shipping’s courier delivery.

  •  Returns & Refund

    Last updated October 05, 2022

    Returns

    If you are not completely satisfied with your purchase for any reason, you may return it to us for a full refund within 15 days from delivery date. All returned items must be in new and unused condition, with all original tags and labels attached.

    Return Process

    To return an item, please email our customer service at sales@alexnld.com to obtain a Return Merchandise Authorization (RMA) number. After receiving a RMA number, place the item securely in its original packaging, and mail your return to the following address:

    Alex NLD
    Attn: Returns
    RMA #
    HaGiborim St 8
    Tiberias, 14388
    Israel

    Please note, you will be responsible for the return shipping charges. We strongly recommend that you use a trackable method to mail your return.

    All customers should contact us and obtain Return Merchandise Authorization (RMA) number before sending anything to us. We will not be responsible for returned item(s) without notifying us in advance.

    Refunds

    After receiving your return and inspecting the condition of your item, we will process your refund to the credit / debit card or PayPal account which was used to place the original order.

    Please allow at least seven (7) days from the receipt of your item to process your refund. Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your credit card company. We will notify you by email when your refund has been processed.

    Exceptions

    If an item is found damaged or defective on receipt, we kindly ask you to contact us within 15 days from the delivery date to arrange a refund or exchange without physical return of the item.

    Please provide us with following:

    1. Photos of the front and back sides of the packaging box;
    2. A photo, video or screenshot of the defective item or the defective part of the parcel.

    Our customer service team will communicate with you to arrange a refund or reshipment without physical return of the item.

    Warranty & Repair service

    If any of the items you have purchased from us is found defective within 1 year from receipt, you are entitled to a repair under warranty. Please kindly provide us with evidence photos or videos of the defective item. After providing such information to our Customer Service team  and the problem is acknowledged, you can send the items back to us for a repair.

    Note:  Please be aware, we do not cover the cost of the returns fees in  warranty & repair service.

    Order Cancellation

    If you want to cancel an order within 24 hours from confirmation of the payment, you will be entitled to a full refund. It is still possible to cancel an order after 24 hours, provided that it has not yet been shipped. If an order has been shipped, it’s impossible for us to cancel or modify it anymore. If you still want a refund, you required to return the item on it’s arrival.

    Questions

    If you have any questions concerning our return policy, please contact us at:

    +972 054-536-2888
    sales@alexnld.com

     


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Feature:



4 string 16.8V 40A lithium battery protection board (comes with recovery function-AUTO Recovery)
Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery)
Product Size: 45 * 55 * 3.4mm (Standard Edition / Enhanced), 46 * 60 * 3.4mm (balanced version)
Product weight: 9.3g (standard / enhanced version), 10.3g (balanced version)
Charging voltage: 16.8V – 18.1V
Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use)
Continuous charge current (upper limit): 20A
Equalization version: suitable for starting current below 80A, power 135W below the drill.


Project Min. Typ. Max. Units
Consuming current 12 18 24 uA
Overcharged protection voltage 4.2 4.25 4.3 V
Balanced starting voltage 4.17 4.2 4.23 V
Equilibrium current 95 100 105 mA
Balanced heating power 1.56 1.72 1.91 W
Overcharge recovery voltage 4.1 4.15 4.2 V
Over-discharge protection voltage 2.4 2.5 2.6 V
Overvoltage protection after over-discharge protection 2.8 3 3.2 V
Overvoltage protection after over-discharge protection 3.2 3.5 3.8 V
Over-discharge recovery voltage 2.9 3.2 3.3 V
Conduction internal resistance 2.5 3 3.5 mQ
Overcurrent protection current C 70 80 90 A
Overcurrent delay time 100 150 200 ms
Continuous operating current 0 40 40 A
Continuous output power 0 672 672 W
Ambient temperature -40 25 85 °C


Troubleshooting:    
Fault phenomenon Fault check and cause The solution
Unable to charge Measuring the voltage of 4 groups of batteries. 
when one of the battery voltages exceeds 4.25V, 

the protection board will activate overcharge protection.
Pair the battery pack well, do not mix 

the good battery and the bad battery.
Unable to discharge Measuring the voltage of 4 groups of batteries. 
when one of the battery voltages is lower than 2.7V, 

the protection board will activate the over-discharge 

protection.
Pair the battery pack well, do not mix 

the good battery and the bad battery.
Charging/discharging 

failure
OV, 4.2V, S.4V, 12.6V, 16.8V miswired Rewire or replace the new board 

(human failure, no warranty)
Overcharge/overdischarge 

failure
OV, 4.2V, 8.4V, 12.6V, 16.8V miswired Rewire or replace the new board 

(human failure, no warranty)
Discharge protection Check that the battery pack has sufficient discharge 

capability and check that the load’s starting current 

exceeds the overcurrent protection current of the 

protection board.
Replace the battery pack with a higher 

discharge capacity, or a protective 

plate with a larger current 

(super working range)
Component soldering There is no connection between one of the components 

and the PCB pad.
Repair welding
Component welding There is a short circuit between two or more pins of the 

component.
Remove the component and re-weld
Electrostatic breakdown A In the unpowered state, measure the G, D, and S 

poles of the MOSFET. If the forward and reverse 

resistances of any two pins are 0Q, 

it indicates that it has broken down.
Remove the replacement MOS tube
Electrostatic breakdown B Remove the MOS tube and measure the resistance 

of the G and D, G and S poles of the MOS tube. 

If there is a resistance indicating that it has broken 

down, the resistance should be infinite.
Remove the replacement MOS tube



Package includes:



1 x Battery Protection Board 


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