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4v DC LED Emergency Light with 3.7v TP4056 Li-Ion Lithium Battery – 5v Micro USB charger / Part-A

This video shows In this video simple how to make an emergency 4v DC LED Light using 3.7v TP4056 Li-Ion Lithium Battery charger with Protection Board Charging Module – 5v Micro USB Interface.
previous video link
1) TP4056 Li-ion Battery Charging with Protection Board – Micro USB 5V interface =

2) 3.7v Li-ion 18650 Battery Charger Module – TP4056 / Micro USB Interface =

(Thanks to for sponsoring this video)

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TP4056 Li-ion Battery Charging with Protection Board
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18650 Li-ion 3.7v battery –
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DC-DC 12-35V 150W Boost Adjust Module –

3S 20A Li-ion Battery 18650 Charger PCB BMS Protection Board 12.6V Cell –
Banggood –
Amazon –

LM2596 dc-dc buck converter step down module =
Amazon –
Banggood –

MINI DC 0-32V 3-Digital LED Display Volt Meter
Banggoog –
Amazon –

Solar LED Wall light
Banggood –
Amazon –

MT3608 2A dc-dc Step Up Boost Power Module =
Amazon –
Banggood –
Click the link see the more videos on the playlist

1)Monitoring & controlling project circuits –
2) Inverter circuits –
3) Chaser LED lights circuits –
4) DC Power supply circuits –
5) Remote control circuit –
6) LED-based circuits –
7) Relay-based circuit –
8) PIC Microcontroller project –
9) Relay-based circuit –
10) Battery controller circuits –
11) Repair works –
12)Transformerless power supply circuits –


Review: Battery Bank Solar Charger, 30000mAh – Hand held, LED Light, Dual USB Charger for Cell Ph.. – Battery Bank Solar Charger, 30000mAh – Hand held, LED Light, Dual USB Charger for Cell Phones, Tablets, GoPro Camera, GPS, etc. by Javary
High capacity 30,000 uAh, palm sized, battery bank solar charger with two USB ports. Most phones hold about 2,000 uAh. This hold 15 times that. Recharge your phone many times on one solar battery charge. Use the sun as a renewable energy source to trickle charge this solar charger at 200 mA when camping, backpacking, or any time wall outlets are not available. Fully charge at 1000 mA using included wall outlet adapter before first use. Impact resistant, water resistant, rubber casing. Three, 3 ft data / charge cables, wall charger, velcro strap, and carry bag included.

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Personal Review Of The US Dual LED Flashlight Waterproof 500000mAh Solar Charger Power Bank

This is my personal review and demonstration of the US Dual LED Flashlight Waterproof 500000mAh Portable Solar Charger Power Bank. It is basically a light weight portable battery you can use to power and charge electronics like smartphones, Bluetooth speakers tablets, and other electronics. This video demonstrates these features and more.

Feel free to leave comments. I am very interested in what you have to say.

#solarcharger #usb #gadgets

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The following music from the Youtube Audio Library was used for this video:

Heated Seat Silent Partner

Sugar Vibe Tracks

Lagos 2030 A.D. Otis McDonald

Cycles by Audionautix is licensed under a Creative Commons Attribution license


Jalandhar by Kevin MacLeod is licensed under a Creative Commons Attribution license


Crunk Knight by Kevin MacLeod is licensed under a Creative Commons Attribution license



usb chargers with led display and making 18650 adaptors for radios/flashlights

Do this at your own risk. This is not a tutorial.
I tried out a couple of usb chargers that have digital displays. The AC one made by Soonhua has a voltage and amp draw display. This will alert you to the fact that the unit is charging so you won’t have to struggle to tell if your device is being charged.
The unit for auto use just has the voltage display. Since most vehicles don’t have a direct voltage display of the 12v battery when the car is switched on, this charger fulfill this function for just a few dollars. Want to see the 12 v battery condition under load, just turn on the headlights for a minute or 2 before switching your vehicle to on and the charger will display your battery voltage under load. Of course this won’t be as accurate as a battery charger with a load tester but remember your car came only with an idiot light for the battery system.
In the second part of the video, I made a battery adaptor so I can use a 18650 lithium ion battery in an old RadioShack radio that normally use 2 C size batteries. A battery sleeve and a spacer are needed to make the conversion work. Since the lithium ion battery is 4.2 v when fully charged, I added a diode to lower the voltage closer to the 3 volt required by the radio. When the battery needs to be recharge, I will use a RC charger to charge the battery so I won’t have to take out the battery and lose the memory functions. I suggest using a protected cell for this project.
I have not included links for the products as the links will not work over time. You can buy these items on eBay by typing the name in the eBay search box.

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OnePlus 7 Pro FAQs- Camera 2 API, LED Notification, Warp Charging, Horizon Light, Battery, Software

#OnePlus7Pro #OnePlus #OnePlus7ProFAQs

OnePlus 7 Pro is the latest flagship smartphone announced and here is the detailed FAQ on the device including Camera 2 API, LED Notification, Warp Charging, Horizon Light, Battery, Software

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Review: Power Bank Portable Charger – 20000mAh High Capacity with Digital Display LED Screen 2 US.. – Power Bank Portable Charger – 20000mAh High Capacity with Digital Display LED Screen 2 USB Output & Dual Input External Battery Pack Compatible with All The Phone
【SMART CHARGE TECHNOLOGY】The USB charging ports will choose the best and fastest amperage rate for your device. You will enjoy high speed and fast charging experience while keeping your devices safe from over-charging, overheating. 【LARGE CAPACITY】Power Bank 20000mAh capacity allows to charging for iPhone X/8/7/6/6s 6 times, iPhone 8/7/6 plus 4.5 times, Galaxy S9/S8/S7/S6 up to 4 times, or iPad Mini more than 2 times. 【DUAL OUTPUT AND DUAL INPUT】the external battery power bank 20000mAh with 2 USB output ports that allow you to charge two devices simultaneously and recharge your power bank via Type-C or micro-USB port. 【LED POWER INDICATOR】The Adruo external battery pack charger features a unique smart LED power indicator that keeps you informed on the status of charging and remaining capacity, so you know when the power bank is running low and needs to be recharged. 【HIGH QUALITY GUARANTEE】Buy it 100% Risk-Free.The YPLANG big capacity power bank will meet all your needs, 12-Months Warranty. Feel free to contact us if you have any problems.

{More detailed infoCheck this out for more infoLots more detail hereCheck here for extra informationMore to read here} –



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Today we are reviewing the Errbbic solar/USB charger

Solar Power Bank 10000mAh Solar Charger Waterproof Portable External Battery USB Charger Built in LED Light with Compass for iPad iPhone Android Cellphones (Black & Orange)


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How to connect led with mobile charger

How to connect led with mobile charger

Please watch: “how to replace ceiling fan bearing/ceiling fan ke bearing ko kaise badle??? in hindi ”