Can I hook a solar panel to this?

A solar controller with +5v output is well advised, or alternately a 12v panel w/ 12v controller and then use a car 12v 1amp to USB converter.

I am considering connecting a solar panel to the charger. What is the maximum voltage the charger can tolerate?

The TP4056 chip on the board says in the datasheet a maximum of 8 volts can be applied to the chip. I don't have it on hand to check, but you can add the voltage drop of any components in series with the power input and T4056's Vcc. Example, if a reverse polarity protection diode with a drop of 1 volt was before the chip, the maximum goes up to 9 volts because after the diode, there is now only a 8 volt potential difference.

Will it cut the power when the battery reaches 3 volts?

Hi, Charging cut-off voltage: 4.2V ± 1%

What is the voltage on the Out pins?

about 5.1volts. I used these to power some Arduino Pro Mini projects using a single lipo18650 cell with good success. The output voltage is 5V regardless of input voltage or if it is running from battery. According to the chip datasheet you are not supposed to run a load and charge the battery at the same time but I had no problems doing so as long as the load was mild (<500ma).

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10pcs TP4056 Charging Module with Battery Protection 18650 BMS 5V Micro USB 1A 18650 Lithium Battery Charging Board

10pcs TP4056 Charging Module with Battery Protection 18650 BMS 5V Micro USB 1A 18650 Lithium Battery Charging Board

Product ID: 43833188

Details

Brand
MakerFocus
Input Voltage
5 Volts
Item Weight
0.02 Kilograms
Output Voltage
5 Volts
Product Dimensions
2.7"D x 0.9"W

⚡5V input voltage

🔋1A max charge current

🛡️Over-discharge & overcurrent protection

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Description

🔌 Charge smart, protect smarter — power your projects like a pro!

BULK PACK ADVANTAGE - Get 10 modules in one set—perfect for pros, makers, and managers scaling their tech toolkit.
ROBUST SAFETY SHIELD - Built-in over-discharge (2.5V) and overcurrent (3A) protection guards your batteries and devices.
COMPACT DIY POWER HUB - Tiny 2.6 x 1.7 cm board with reserved wiring pads for seamless custom projects and upgrades.
PRECISION BATTERY CARE - Smart cut-off at 4.2V ±1% ensures your 18650 lithium batteries stay healthy and long-lasting.
EFFORTLESS USB CHARGING - Plug-and-play Micro USB input compatible with any phone charger for instant power-up.

This 10-pack of TP4056 charging modules offers a professional-grade 5V Micro USB input with 1A max charging current, designed specifically for 18650 lithium batteries. Featuring precise voltage cut-off and comprehensive battery protection circuits, these compact boards empower DIY enthusiasts and tech managers to efficiently charge and safeguard their battery-powered devices with confidence.

Specifications

ASIN	B071RG4YWM
Amperage	1 Amps
Best Sellers Rank	#141,663 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #606 in Power Converters
Brand	MakerFocus
Color	Blue
Compatible Devices	Cellphone
Connector Type Used on Cable	Micro USB
Current Rating	1 Amps
Customer Reviews	4.6 out of 5 stars 533 Reviews
Input Voltage	5 Volts
Item Weight	0.02 Pounds
Manufacturer	MakerFocus
Mfr Part Number	TB41543514691F378
Model Number	8541549166
Number of Ports	10
Output Voltage	5 Volts
UPC	190033766643
Unit Count	10.0 Count
Warranty Description	No Warranty

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€ 22.17

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered 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 Cyprus.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Received my product in pristine condition. Great service overall.

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