I do know a fair bit about liion batteries and their chaging (CC/CV charging, C ratings, over-charge/discharge) and got this charger and these batteries. So first of all, charging-wise. I will make sure to set it to 4.2V, as that is the voltage of my batteries, and .75C (600mA) doesn't seem too unreasonable for charging. But are there any possible concerns with overcharging, where boards are unsafely designed?
Also, for overcurrent protection I think I'll just use a fuse soldered in series with the wires (I don't plan on have shorts, but while a blown fuse is ok, explosions are not). However, the one thing I will need that I'm not sure about is some sort of overdischarge protection. I've got an assortment of standard BJT transistors, some power mosfets (IRFZ44Ns), comparators, some other standard stuff, including a wide range of your typical passives. Can someone recommend a circuit I could make with those components that is fairly simple, uses <1uA when off, and is 90% or more efficient under normal use? It could be turned back on by a push-button.
Also, for overcurrent protection I think I'll just use a fuse soldered in series with the wires (I don't plan on have shorts, but while a blown fuse is ok, explosions are not). However, the one thing I will need that I'm not sure about is some sort of overdischarge protection. I've got an assortment of standard BJT transistors, some power mosfets (IRFZ44Ns), comparators, some other standard stuff, including a wide range of your typical passives. Can someone recommend a circuit I could make with those components that is fairly simple, uses <1uA when off, and is 90% or more efficient under normal use? It could be turned back on by a push-button.