Selection of cells
- Leclanche cell for intermittent supply of current.
- Daniel cell for constant EMF source.
- Lead accumulator for strong current ~ 100 A due to its low r.
- Lead accumulator also called acid cell for highest EMF (= 2.05 V) & minimum internal resistance (≈0.01 Ω).
- Dry cell for weak current ~ 10 mA.