Table 1.

Common commercial battery characteristics compared with aqueous (aq.) Ni-MH system [3,4,5].

Rechargeable Battery System	Electrolyte	Specific Energy (Wh/kg)	Cycle Life	Nominal Voltage (V)
Lead Acid	aq. H2SO4	30–50	200–300	2.0
Ni-Cd	aq. KOH	45–80	1000	1.2
Ni-MH	aq. KOH	60–120	300–500	1.2
Li-ion (LiCoO2)	LiPF6 in propylene carbonate/diethyl carbonate	150–250	500–1000	3.6
Li-ion (LiFePO4)	LiPF6 in ethylene carbonate	90–120	1000–2000	3.3
Li-ion (LiMnO2)	LiClO4 in ethylene carbonate	100–150	500–1000	3.7