Discussion between tlfong01 and David McTravord

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3:06 AM

The OP is using a XL6009 boost converter without an on board DVM. I would suggest one with DVM, as shown below.

XL6009 references:

DC-DC XL6009 Digital Boost Step Up Power Supply Module Adjustable 4.5 - 32V to 5-52V Step-up Voltage Regulator With LED Voltmeter HKD17.65
https://www.aliexpress.com/item/2036624928.html?spm=a2g0o.productlist.main.89.31e151eaSN6wmt&algo_pvid=ca799e70-009e-479e-bb43-95df4c8d372d&algo_exp_id=ca799e70-009e-479e-bb43-95df4c8d372d-44&pdp_ext_f=%7B%22sku_id%22%3A%2257763920128%22%7D&pdp_npi=2%40dis%21HKD%2125.54%2117.65%21%21%21%21%21%40211bd7d616696044443763117d0725%2157763920128%21sea&curPageLogUid=wcv89rSSAAcc

5 hours later…

tlfong01

7:44 AM

Warning to the OP:

(1) Why 18650 Battery Would Explode - DNK Power
https://www.dnkpower.com/why-18650-battery-explode/

(2) Should you be worried about exploding Lithium Ion batteries? - Aries RC 2016
https://www.youtube.com/watch?v=zce3bFKnkvU

1 hour later…

tlfong01

8:53 AM

More 1S protection board for double safety:

1S 3.7V 3A li-ion BMS PCM Battery Protection Board DC 4.2`5V CC/CV PCM for 18650 Lithium Ion Li Battery - AliExpress HK7/5pcs
https://www.aliexpress.com/item/1005003503612563.html?spm=a2g0o.productlist.main.65.d94e638azuuhhL&algo_pvid=0fa5deb4-a675-4640-bdac-e3aadff66812&algo_exp_id=0fa5deb4-a675-4640-bdac-e3aadff66812-32&pdp_ext_f=%7B%22sku_id%22%3A%2212000026085995123%22%7D&pdp_npi=2%40dis%21HKD%218.67%216.95%21%21%21%21%21%4021021a7216696250856824863d0720%2112000026085995123%21sea&curPageLogUid=T4b2srt2fuUd

4 hours later…

tlfong01

12:33 PM

Now I am going to test the TP4056 module with protection circuit.

1 hour later…

tlfong01

1:37 PM

TP4056 Cheat Sheet

TP4056 1A Standalone Linear Li-lon Battery Charger with Thermal Regulation in SOP-8 Datasheet - NanJing Top Power ASIC
https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/TP4056.pdf