Return items will be accepted within 40 days when is the date of receiving the goods. Customized items cannot be returned or exchanged. Items bought with an e-gift card are exchangeable only; refunds are not applicable.
Free Gift
Welcome to Roymall, your professional website for purchasing premium department store gifts. We highly value and appreciate your support, and we want to express our gratitude by adding an extra touch of excitement to your purchases. When you shop with us, you not only get to enjoy high-quality products that enhance your lifestyle, but you'll also receive an exclusive free gift with every order you place. Ready to explore our collection and find your perfect gifts? Browse our selection of premium department store items, place your order, and look forward to the excitement of your free gift arriving alongside your purchase.
Shipping Policy
We will work hard to deliver items to you after receiving your orders and make sure they arrive safely. Delivery details will be provided in your confirmation email.In most cases, orders are processed within 2 days.Under special circumstances, it will be delayed as follows: When you place an order on Saturday, Sunday or public holidays, it will be delayed for 2 days..Normally, it needs 5-7 working days (Monday to Friday) without being affected by flight delay or other environmental factors..Because our shipping service is worldwide so the delivery times will depend on your location so it may need a few times and please wait patiently if you are in remote districts or countries.
1. Return & Exchange Policy
We only accept items purchased from roymall.com. If you purchase from our local distributors or other retailers, you cannot return them on our side.Final sales items or free gifts are not acceptable for a return.To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.After receiving return instructions from us, please package up your returned items and drop your package at the local post office or another courier. We will process your return or exchange item within 3-5 working days after we receive it. The refund will be processed and credited automatically to your original method of payment.No returns or exchanges can be accepted if the product was custom produced, including custom size, custom
color, or custom printed.Need more help, please contact us. service@roymall.com or Whatsapp: +447549870296
2.Refund Policy
You'll get a full refund or 100% store credit after we receive the returned package and check it. The refund will be processed and credited automatically to your original method of payment.Please note that shipping costs and any duties or fees are not refundable. The extra shipping costs are non-refundable once the package has been shipped. You are responsible for paying these fees and we’re unable to waive or refund them, even if the order is returned back to us.Once we received and confirmed your returned item, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.If you have any problems regarding the refund process, please contact us. service@roymall.com or Whatsapp: +447549870296
Short circuit protection condition: external load short circuit
Short circuit detection delay: 250uS
Short circuit protection release condition: disconnect load
Main circuit conduction internal resistance: ≤20MΩ
Working current: ≤30uA
Sleep current (current over discharge): ≤20uA
Working temperature: -20~+80°C
Features:
6 strings (for 6 18650 batteries or polymer lithium batteries in series)
21.6V (rated voltage of polymer battery)
22.2V (rated voltage of 18650 or 3.7V lithium battery)
25.2V (voltage after the lithium battery is fully charged)
Discharge 22A (refers to the upper limit discharge current limit)
Precautions:
1. Lithium battery protection board can not be used for lithium iron phosphate battery, xenon lamp, hand drill battery pack, electric fish battery pack, electric bicycle battery pack, baby car battery, 550 or more power motor, 1W fisheye LED lamp, Customers who purchase in the above combination should pay attention to the following products: the massager battery pack, LED light backup power supply, 12V electronic products, solar street light battery pack, monitoring standby power supply, and other products.
2. For discharge products above 3A, the discharge rate of the battery should be more than 3C. Magnification formula: 1C rate battery, 2000 capacity equals 2AH*1=2A working current, 3C rate battery, 2000 capacity equals 2A*3=6A working current. In use, the battery will heat up or the battery rate is not applicable. The battery will be damaged quickly after long-term use.
3. After connecting the line, you need to charge first to have output.
4. When connecting 6 sets of batteries in series, please ensure that the voltage of each set of batteries is the same. If they are different, please fill each set of batteries separately and use them in series. During the discharge test, the battery with the fastest voltage drop is the poor battery.
5. Do not mix good battery and poor battery! The closer the internal resistance of the 6-cell battery is, the better! (The effect of 4 good batteries + 2 poor batteries = the effect of 6 poor batteries)
Connection Diagram:
Strictly follow the diagram wiring: 0V (B-), 3.7V (B1), 7.4V (B2), 11.1V (B3), 14.8V (B4), 18.5V (B5), 22.2V (B+), do not Deliberate short circuit!
Roymall C.o.
Free Gift
Shipping Policy
Return Policy
Coupon Code
Direct purchase from the factory 
Electronic Components & Supplies
Module Board
Battery Protection Module
