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Xinyuan-LilyGO / LilyGO-T-SIM7000G

LilyGO T-SIM7000G
https://pt.aliexpress.com/item/4000542688096.html
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Internal battery charging #244

Open printrmd opened 9 months ago

printrmd commented 9 months ago

Hello Is it possible to charge the internal battery not through the USB input because when there is a power fail and there is no voltage to charge it, the modem reboots or when the power returns. Thanks.

realbeeit commented 9 months ago

You can charge it through solar input.

printrmd commented 9 months ago

hi Can I connect a power supply or battery to the input of a solar panel, what voltage should it be Thanks From: BeeIT Sent: Friday, October 6, 2023 11:24 AM To: Xinyuan-LilyGO/LilyGO-T-SIM7000G Cc: printrmd ; Author Subject: Re: [Xinyuan-LilyGO/LilyGO-T-SIM7000G] Internal battery charging (Issue #244)

You can charge it through solar input.

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realbeeit commented 9 months ago

Solar input is anywhere between 0 and 6V.

xyzzy42 commented 8 months ago

The charger used has a minimum voltage of 4.35 V. So the input needs to be 4.35 V - 6 V in order to charge. Under 4.35 V won't break anything, but it won't charge. At least according to the datasheet of the CN4065. It doesn't have a boost converter, so the input voltage needs to be greater than the battery's voltage.

If the battery is discharged down to 3V, then maybe it can charge on the a 3.1 V input? At least until the battery voltage rises to meet the input voltage. Datasheet seems to indicate 4.35 V (or sometimes 4.4 V, it's inconsistent) is the minimum, but I wonder if that's really the case.

billsargent commented 5 months ago

When plugged in via USB, does this actually charge the battery? The documentation isn't clear on that.

printrmd commented 5 months ago

Hi i have new esp32 with A7670G there is two usb connector way?

thanks

From: billsargent Sent: Tuesday, January 23, 2024 1:25 AM To: Xinyuan-LilyGO/LilyGO-T-SIM7000G Cc: printrmd ; Author Subject: Re: [Xinyuan-LilyGO/LilyGO-T-SIM7000G] Internal battery charging (Issue #244)

When plugged in via USB, does this actually charge the battery? The documentation isn't clear on that.

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billsargent commented 5 months ago

I checked with my meter last night and there is voltage from USB to the 18650 holder on the back. So it apparently does charge by USB without the need for a solar panel or some external power sourcce connected to the solar input.