Hello, I could not find a forum group specifically for power supply/ups/charging/battery. My question/ concern is I purchased (2) 18650 Battery Charge Shield Board V3 and when the unit's charge connector is connected to a live power source with battery installed, the unit will provide the 3.3 and 5 …

It should be easy to determine if it has onboard regulators that run off the battery after the cable is removed. It is quite possible that they are directly connected so they still work during charging. Look for the schematic a datasheet or surface mount regulator ICs.

Did you get to the bottom of this in the end? I have just purchased one and am having similar weird issues.

I have a similar / same one I purchased from Banggood. It works fine for me. It is indeed a: 18650 Battery Charger 3.7V to 5V boost converter an over charge over drain circuit. When I first got mine I plugged in the 18650 (be very careful about the polarity. I followed the board printing but on …

I'm waiting for mine to arrive from Banggood. Any day now. Here's a video by Andreas Spiess on this item (I think it's the same item.) [#250 Universal Power Source (UPS) for only 2$. Is this possible? (Raspberry Pi, Arduino, ESP32)] And here's website with more information: P…

when I unplugged the charge cable, the battery only stays on for 5 seconds and then shuts off Are you SURE it is not doing EXACTLY what it was designed to do ? A battery charger is just that. What you need is a charging circuit that is designed to maintain the battery voltage , as opposed to o…

Does anyone have the dual 18650 v8 version of this?

Thanks for the comments. Its the dual-18650 version that I have. This battery board I have is advertised as an Arduino shield and designed to power your projects. Therefore I naturally assumed that it had the ability to be charged from a micro-usb power brick and once charged would be able to be …

Blue407: To get the unit to power up, I first installed the 2 charged batteries, plugged the 3.3v pin into my project and then had to plug a micro-usb charger in for 10 secs to get it to wake up. I was then able to unplug the charger and leave it running. I can only conclude that the circuit for…

Hi, I found this schematic for I believe the V3 unit. [Wemos_18650_Battery_Shield_V3_Schematic.jpg] Tom... :slight_smile: [Wemos_18650_Battery_Shield_V3_Schematic.jpg]

18650 Battery Charge Shield Board V3

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TomGeorge April 29, 2020, 12:38am 16

Hi,
I found this schematic for I believe the V3 unit.

Tom...

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18650 Battery Charge Shield Board V3

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