Anmbest 5PCS 1S 3.7V 12A 18650 Charger PCB BMS Protection Board for Li-ion lithium Battery Cell

like many I'm in search for a simple effective cheap and safe solution to provide a 12 volt rechargeable lithium power supply that can be embedded in the projects and just left there the battery pack needs to be powerful enough for larger projects and self-managing meaning it's safe from overcharging and over discharging which is the quickest way to start a fire or destroy the cells I've started assessing the different possible approaches and components including 3s battery charges and battery protection boards so let's start by looking at some of the approaches and the pros and cons for each so the easiest and cheapest approach is to use a BMS so this allows you to connect 318 650 batteries in series giving a battery pack that produces between eight point seven and twelve point six volts at many amps so the cell voltage can go lower but the BMS cuts off the cell if the voltage drops be