When powering a battery operated circuit, the experimenter must make a decision: either take his chances (Murphy loves this one), or opt to add protection in the form of a simple series diode.

Nisshinbo Micro Devices has released the NB7123 and NB7130, two 1-cell Li-ion battery protection ICs in an ultra-small WLCSP package. Li-ion battery protection ICs Credit: Nisshinbo Micro Devices ...

If you've been driving long enough, this scenario might sound familiar: You get into your car, turn on the ignition, and then... nothing. Your battery is dead, and you're probably going to be late.