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Lithium-ion Batteries
By comparison with other rechargeable battery systems, rechargeable Lithium-ion batteries provide better performances, higher capacity, higher energy density, no memory effect, longer cycle life and faster charging. In addition, lithium-ion batteries have less self-discharge rate, only 5~8% self-discharge of capacity per month. Therefore, lithium-ion battery packs would offer you more capacity, smaller size, lighter weight and shorter charging time.
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Charging Technology
Unlike other rechargeable batteries, lithium-ion batteries require a two-step charging process. The first charge step is to charge a lithium-ion battery with constant current up to its upper limit voltage. The second step is to keep this upper limit voltage with a current taping down to 1~5% of 1C. Therefore, the termination of charging process for a lithium-ion battery is determined by the current, but not by the voltage. A professional charger is required for completing the two-step charging process for lithium-ion batteries. In the first step, a lithium-ion battery receives about 60% of energy by constant current charging. At the end of the second step, it would be fully charged.
There are some published negative reports on Lithium-ion Batteries. We have not varified these facts, please use this information as a reference only.
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The Chemical reaction counter acts any lower internal resistance, reducing the shelf life of the Li-ON cell.
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Substantially lower charge discharge cycles. Cell temperature, high discharge rates, and charge discharge cycles affect and greatly reduce the cycles of Li-ON making real life charge discharge cycles more accurate at +/- 200
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Substantially more expensive per watt hour of run time.
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Much more narrow operating temperature range.
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Great inability to handle high discharge rates.
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Highly susceptible to reverse polarity.
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Sloped discharge rate creating an unexpected sharper cut-off voltage
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Higher cut-off voltage, A 14.4V Li-ON will cut off at 12.0V verses a Ni-CD or Ni-MH at 11.0V
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Additional expense of semi-safe circuitry due to the highly volatile nature of lithium.
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Expense of chargers for Li-ON battery
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Expense in the Very Short Warranty period of new Li-ON batteries and their special chargers
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