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.
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:
The lithium battery protection board uses a highly integrated intelligent lithium battery protection board integrated chip, the performance is better than the protective board composed of discrete chips. Can complete 3/4/5 string polymer lithium battery, ternary lithium battery, lithium iron phosphate, lithium cobalt oxide, lithium manganese oxide battery charge and discharge protection, over current, short circuit, over temperature protection and equalization function.
It adopts 4 milliohm ultra-low internal resistance MOS tube, which has low internal resistance and high efficiency. It is suitable for battery pack applications in different fields such as inverters, DC motors, power tools, and solar street lights. It is common to the same mouth and mouth, and has strong applicability. The protection board has a heat sink and a supply line.
Notes:
1. Please select the appropriate protection board according to the actual battery type and series connection. The protection board of different series number can not be used universally. The protection board can switch the serial number of the battery by jumper. See the parameter adjustment explanation picture for details.
2. Before the protection board is installed, the battery must be matched well, and the old and new batteries cannot be mixed.
3. Please remove the cable before wiring, and connect all the wires, and then confirm that the wiring is correct before plugging in the cable. When wiring, the control wiring diagram is gradually connected from the negative pole of the battery. For the thick line, please select the appropriate square wires according to the actual load current value.
4. When the working current is too large, please add tin to the tinned part of the front and back of the protection board, or thicken the copper wire to increase the overcurrent capability of the circuit board. Otherwise, the copper skin on the circuit board will be led to the current due to excessive current. Skin or burned.
5, need temperature protection function, you need to add 10K NTC resistor (refer to the description). The factory default is no temperature protection resistor.
6. This protection board has over-current protection secondary delay optional. If the load instantaneous starting current is very large and leads to mis-protection, you can select the secondary over-current protection delay to reduce the occurrence of false protection.
Specification:
Protection item
Protective Parameters of Polymer/Ternary Lithium Manganate Batteries
Protection parameters of lithium iron phosphate batteries
Single Overcharge Protection Voltage
4.25V ±0.025V
3.75V ±0.025V
Single section overcharge relief voltage
4.15V ±0.05V
3.55V ±0.05V
Overcharge protection delay
1S ±200mS
1S ±200mS
Single Section Over-Amplification Protection Voltage
2.7V ±0.05V
2.0V ±0.05V
Single-section Over-discharge Release Voltage
3.0V ±0.1V
2.7V ±0.1V
Over-discharge protection delay
1S ±200mS
1S ±200mS
Discharge Overcurrent Protection
70A
70A
Delay of discharge overcurrent protection
100mS ±50mS
100mS ±50mS
Short circuit protection
Yes
Yes
Short circuit protection delay
250uS ±50uS
250uS ±50uS
Short circuit protection recovery mode
Disconnecting Load and Recovering Output Voltage
Disconnecting Load and Recovering Output Voltage
discharge current
50A (Over 20A, please stack the tin-plated part of PCB or add copper wire to increase overflow)
50A (Over 20A, please stack the tin-plated part of PCB or add copper wire to increase overflow)
Charging current
50A (Over 20A, please stack the tin-plated part of PCB or add copper wire to increase overflow)
50A (Over 20A, please stack the tin-plated part of PCB or add copper wire to increase overflow)
Equilibrium function
Yes
Yes
Equilibrium Open Voltage
4.18V ±0.025V
3.5V ±0.025V
Balanced current
55mA
55mA
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Availability: 
Shipping: Free Airmail 
