How do I connect these for 24 volts using 14 18650 batteries? 7 in series, 2 groups in parallel.

I recommend to use 3S 11.1V 12.6V 25A W/Balance 18650 Li ion Lithium Battery PCB Protection Board Know as a BMS. search for DIY 18650 battery pack

What is the max input voltage? Would 5v be ok

5v input should be fine. The battery will be allowed to charge till a battery measure of 4.25 is reached, then the circuit will disconnect your 5v input from the battery.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

KOOBOOK 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery | Solder Belt,Silk-Screened PCB Labels (B+,B-,P+,P-),for Building Custom Battery Packs Garden Solar Lights and on-the-go Power

Product ID: 166027929

Details

Brand
KOOBOOK
Color
Green
Input Voltage
3.7 volts
Item Weight
0.01 kg
Output Voltage
3.7 volts

⚡2A continuous current limit

🔋4.2V precise charging voltage

🛡️Multi-layer battery protection

€ 15.07

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

Description

🛠️ Build smarter, power safer — never miss a charge!

COMPACT VERSATILE - Slim 30x3.7x2.2mm PCB fits seamlessly into custom 1S 18650 battery builds.
POWER WITH PRECISION - Engineered for exact 4.2V charging to maximize battery life and performance.
SAFETY FIRST ALWAYS - Integrated overcharge, overdischarge, short circuit, and overcurrent protections keep your battery pack secure.
PLUG PLAY CONFIDENCE - Silk-screened PCB labels (B+, B-, P+, P-) ensure foolproof wiring every time.
BULK READY FOR BUILDERS - Pack of 10 boards to power up multiple projects or scale your solar and portable power solutions.

The KOOBOOK 10pcs 3A BMS Protection Board is a compact, reliable battery management system designed for 1S 3.7V 18650 Li-ion batteries. Featuring precise 4.2V charging, 2A continuous current handling, and comprehensive safety protections including overcharge, overdischarge, short circuit, and overcurrent safeguards, it ensures optimal battery performance and longevity. Ideal for custom battery packs in garden solar lights and portable power devices, this set of 10 boards comes with clear silk-screened PCB labels for easy installation and stable, low current consumption operation.

Specifications

ASIN	B07W75BQWW
Best Sellers Rank	#53,670 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #37 in Lab Power Supplies #71 in Life Science Supplies
Brand	KOOBOOK
Color	Green
Customer Reviews	4.4 4.4 out of 5 stars (150)
Input Voltage	3.7 volts
Item Weight	0.01 kg
Manufacturer	KOOBOOK
Mfr Part Number	KB457
Model Number	KB457
Number of Items	10
Number of Outlets	10
Output Voltage	3.7 volts
Plug Type	Type A
Power Source	rechargeable battery
UPC	797805999058
Unit Count	10 Count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 15.07

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

View all Trustpilot reviews