Anyone got any ideas why my 3000maH Li-ion battery drains after about one day of use on LCD and arduino project?
Drops to incredibly low voltage of 0.4V, and then if i charge it, restores voltage to 4V in a couple minutes.
Circuit “diagram” attached. I’ve got two boost converters to power arduino and solenoid, and charger in parallel as well
I did solder the battery contacts, although have tried another battery without and seems to have same problem.