Information£º

Scope of application: lithium batteries with nominal voltage of 3.6V and 3.7V (including 18650, 26650, polymer lithium batteries)
Product size: 46*60*3.4mm (balanced version)
Product weight: 10g (balanced version)
Charging voltage: 16.8V - 18.1V
Product size: 45*55*3.4mm (enhanced version)
Product weight: 9g (enhanced version)
Continuous discharge current (upper limit): 40A (if the heat dissipation environment is not good, please reduce the load current)
Continuous charging current (upper limit): 20A
Enhanced version: suitable for electric drills with starting current below 80A and power below 135W.
Balanced version: suitable for electric drills with starting current below 80A and power below 135W.

¡¤ Reliable 4S 40A Battery Protection for 18650 Packs

Offers overcharge, overdischarge, and short circuit protection with balance charging, ensuring safe and efficient performance for DIY projects and high-power tools.

¡¤ Enhanced & Balanced Versions for Optimal Use

Choose enhanced or balanced options to meet specific needs, with stable power output and extended battery life, ideal for DIY battery packs and electric drill motors.

¡¤ Compact, Durable, and Easy to Install

Built with a compact design, this 4S 40A BMS is lightweight, durable, and easy to wire, making it perfect for custom battery setups and professional applications.

Important Notice

1. Confirm Shipping Address
Before Buying, Please Ensure Your Shipping Address Is Correct To Ensure Timely Delivery.
2. Phone Number Recommended
To Ensure More Accurate Delivery, Please Provide A Contact Number.

Return & Refund Policy

Returns And Refunds:
1.If You Receive A Defective Item, Please Contact Us Within 7 Days.
2.If You Are Not Satisfied With The Product And Want To Return It, Please Contact Us Within 7 Days After Receiving The Order.

Feedback & Reviews

We Appreciate Your Timely Confirmation Upon Receiving Your Order.
Your Feedback Is Vital To Us; If You Are Satisfied With Our Product And Service, Please Leave Positive Feedback. This Will Greatly Help Us.
Please Contact Us Before Leaving Any Negative Or Neutral Feedback.
We Will Work Hard To Resolve Any Issues You May Have. Thank You For Your Understanding!