How To Be Sure Your Batteries Are Dead Before Tossing Them Out
If a device stops working, it can be tough to tell if its battery has died or the product itself. There are easy ways to rule ...
Ars Technica27d
Why does a digital clock need (or not need??) negative 1.5V?
I found that the top battery is wired into the circuit board at a point marked "+1.5V" and bottom battery is wired with reversed polarity to a spot marked "-1.5V". (the bridge plate between the ...