I have a Sears deep-cycle lead-acid 12v battery already which I've only used once or twice a year for certain power applications. I was thinking of purchasing an identical model and wiring it in ...

For those willing to put some elbow grease into it, there is an almost unlimited supply of 18650 lithium ion batteries around for cheap (or free) just waiting to be put into a battery pack of some ...

I have used this little 6-amp battery charger for decades (Figure 1). It was given to me by my dad, who probably bought it in the 1970s. The charger worked really well for the small batteries in my ...