These are the mail-in services for battery ... 9-volt batteries. To take advantage of this service, residents must simply tape up their batteries’ exposed terminals (so they don’t short ...

There are LiPo battery shields available, and although they may work well, recharging requires access to a USB port. You can also go the 9v battery route plugged into the on-board regulator of the ...

[Rajendra Bhatt] wrote in to share the latest in a series of PIC tutorials, which covers the microcontroller’s Sleep mode – a very useful tool for limiting current consumption in battery ...