Help with Arduino powering

I have had some bad experiences with using 18650 to power Arduino. The setup which worked for me was 2S 18650 thru Arduino VIN (using a 2S lithium charger module and bms).

1S 18650 with TP4056 (WITH DW01) then a boost converter (converting to 9V) then to VIN, may have led to the Arduino getting fried.

Can someone give me some very reliable ways to power Arduinos thru lithium? Should I design my own battery protection + charging + voltage regulation system? Please give me some suggestions.