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 with Solder Belt for 1S 3.7V 18650 Li-ion Lithium Battery Cell Kit

KOOBOOK 10pcs 3A BMS Protection Board with Solder Belt for 1S 3.7V 18650 Li-ion Lithium Battery Cell Kit

Product ID: 166027929

Details

Brand
KOOBOOK
Color
Green
Input Voltage
3.7 Volts
Item Weight
0.01 Kilograms
Output Voltage
3.7 Volts

⚡3.7V stable output

🔋2A continuous current limit

🛡️Multi-layer battery protection

R264

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Power up with confidence — protect your battery, protect your hustle!

PLUG PLAY EFFICIENCY - Pre-soldered belt and clear wiring instructions make installation quick, minimizing downtime.
ROBUST CURRENT HANDLING - Supports up to 2A continuous current with 2.5A overcurrent detection for reliable power delivery.
PRECISION VOLTAGE CONTROL - Overcharge cutoff at 4.23±0.05V ensures battery longevity and safety.
COMPACT VERSATILE DESIGN - Slim 30x3.7x2.2mm board fits various 1S 18650 lithium battery configurations effortlessly.
COMPREHENSIVE BATTERY SAFEGUARDS - Integrated overcharge, over-discharge, short circuit, and overcurrent protections keep your battery pack secure.

The KOOBOOK 10pcs 3A BMS Protection Board kit offers precise voltage regulation and multi-layer safety features tailored for 1S 3.7V 18650 lithium-ion batteries. With a compact form factor and robust 2A continuous current capacity, it ensures stable, reliable power output while safeguarding against overcharge, over-discharge, short circuits, and overcurrent. Ideal for professionals seeking dependable battery management in high-integration, cost-effective applications.

Specifications

ASIN	B07W75BQWW
Brand	KOOBOOK
Color	Green
Customer Reviews	4.4 out of 5 stars 148 Reviews
Input Voltage	3.7 Volts
Item Weight	0.01 Kilograms
Manufacturer	KOOBOOK
Mfr Part Number	KB457
Model Number	KB457
Number of Outlets	10
Output Voltage	3.7 Volts
Plug Format	Type A
Plug Type	Type A
Power Source	rechargeable battery
UPC	797805999058
Unit Count	10.0 Count

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