Why USE Lithium-ion battery for 7.4v li ion battery packs？
Lithium-ion is a low maintenance battery, an advantage that most other chemistries cannot claim. There is no memory and no scheduled cycling is required to prolong the battery’s life. In addition, the self-discharge is less than half compared to nickel-cadmium, making lithium-ion well suited for modern fuel gauge applications. lithium-ion cells cause little harm when disposed.
Lithium ion (Li-ion) battery technologies offer increased performance over nickel- and lead-based battery packs and battery assemblies. Li-ion and lithium polymer batteries can provide up to twice as much energy density as NiCD (nickel cadmium) batteries, and are capable of high discharge currents. Li-ion and lithium polymer batteries have relatively low self-discharge rates and generally have long shelf lives and life cycles.