- What is voltage?
Voltage is commonly used as a short name for electrical potential difference. In this introduction, the term "voltage" is however used to mean electric potential, i.e. a hypothetically measurable physical dimension, and is denoted by the algebraic variable V (inclined or italicized letter). The SI unit for voltage is the volt (symbol: V [not italicized]). Note that International Standards maintain this distinction between "sloping vee" (V) and "upright vee" (V).
- How about a low voltage?
Voltages as low as 50 volts can lead to a lethal electric shock under certain circumstances.
- Does it nees special charger?
No, it doesn't. Batteries may be recharged hundreds of times in any NiMH battery charger.