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.

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KOOBOOK 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery

Product ID: 166027929

Details

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

⚡3A max continuous current

🔋Overcharge & overdischarge protection

🛡️Short circuit & overcurrent defense

€ 14.73

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In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Description

🛠️ Power your projects with precision and peace of mind!

ULTRA COMPACT DESIGN - Slim 30x3.7x2.2mm PCB fits seamlessly into custom battery builds without bulk.
BULK PACK FOR PRO BUILDERS - 10pcs per pack to fuel multiple projects or rapid prototyping with consistent quality.
PLUG PLAY WITH CLEAR LABELING - Silk-screened PCB labels (B+, B-, P+, P-) ensure foolproof wiring and quick assembly.
POWER PACKED 3 A CURRENT HANDLING - Delivers stable, high-efficiency current for your 18650 battery packs.
COMPREHENSIVE BATTERY SAFETY SUITE - Built-in overcharge, overdischarge, short circuit, and overcurrent protections keep your power source secure.

The KOOBOOK 10pcs 3A BMS Protection Board is a compact, reliable battery management system designed for 1S 3.7V 18650 Li-ion batteries. It features essential protections against overcharge, overdischarge, short circuit, and overcurrent, ensuring maximum safety and longevity of your battery packs. With clear silk-screened labels and a slim form factor, it’s ideal for custom battery pack assembly, solar garden lights, and portable power solutions.

Specifications

ASIN	B07W75BQWW
Best Sellers Rank	#95,302 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #72 in Lab Power Supplies #163 in Life Science Supplies
Brand	KOOBOOK
Color	Green
Customer Reviews	4.4 4.4 out of 5 stars (152)
Input Voltage	3.7 volts
Item Highlight	Solder Belt,Silk-Screened PCB Labels (B+,B-,P+,P-),for Building Custom Battery Packs Garden Solar Lights and on-the-go Power
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

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€ 14.73

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

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