| The author found that a long-neglected gel battery in a hand-held vacuum cleaner had gone high-resistance. It took some effort to make it us...
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| Some years ago Elektor published an experimental spot welder using capacitive discharge to weld connections to NiCd batteries. I'd like...
| The electric car is everybody’s darling but there are still technical difficulties to overcome before we’ll witness full-scale implementatio...
| This small circuit was developed to monitor the battery in a model hovercraft. The lift in the model is produced by an electric motor drivin...
| The circuit described here provides monitoring of the charge status of a battery by the continuous measurement of charge and discharge curre...
| Just yesterday I was publicly pondering a possible EV purchase, I see one major drawback: the long charging times. A few solutions are alrea...
| For load currents up to 4 A the author has used a bistable relay to disconnect the load on a 12 V battery to avoid deep-discharge. How can w...
| During the past year the author has built a standalone solar panel system, which included the construction of the panels themselves. Such a...
| PP3-size 9 V batteries (IEC: 6LR22) have a considerably poorer price/energy ratio than 1.5 V AA (IEC: LR6) cells. This makes it all the more...