Battery Type Lead-Acid Ni-Cd Ni-MH Li-ion Discharge Limited to 100% Limited to Limited to 80% 80% possible 80% due to safety circuit Charge Constant Constant Constant Constant current Methods voltage to current, then current, then to 4.1-4.2V, then 2.40V. Float trickle charge trickle constant voltage charging at charge. 2.25V Heating when charged Storage Stored at full Stored at Stored at Stored at charge 40%. Five 40% intermediate years of depth of charge storage 3.7-3.8V possible at room temp Charging 10 hours 1 hour 1 hour Less than 1 hour times (Fastest) Nominal 2.0V 1.2V 1.2V 3.7V Voltage Pros Economical, High No heavy No memory long term mechanical metals, high effect, high 3.7V reliability strength, high capacity voltage, low efficiency charge
Battery Type Lead-Acid Ni-Cd Ni-MH Li-ion Discharge Limited to 80% 100% possible Limited to 80% Limited to 80% due to safety circuit Charge Methods Constant voltage to 2.40V. Float charging at 2.25V Constant current, then trickle charge Constant current, then trickle charge. Heating when charged Constant current to 4.1-4.2V, then constant voltage Storage Stored at full charge Stored at 40%. Five years of storage possible at room temp Stored at 40% Stored at intermediate depth of charge 3.7-3.8V Charging times (Fastest) 10 hours 1 hour 1 hour Less than 1 hour Nominal Voltage 2.0V 1.2V 1.2V 3.7V Pros Economical, long term reliability High mechanical strength, high efficiency charge No heavy metals, high capacity No memory effect, high 3.7V voltage, low
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