Main Characteristics of Ni-MH Batteries
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| 1. Charge Characteristics |
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| 2. Discharge Characteristics |
The discharge characteristics of nickel-metal hydride batteries are affected by
current, temperature, etc., and the discharge voltage characteristics are flat at 1.2V,
which is almost the same as for Ni-Cd batteries. The discharge voltage and discharge efficiency decrease in proportion as the current rises or the temperature drops. |
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| 3. Cycle Life Characteristics: |
| The cycle life of these batteries is governed by the conditions under which they are charged and discharged, temperature and other conditions of use. Under proper conditions of use (example: IEC charge and discharge conditions), these batteries can be charged and discharged for more than 500 cycles.
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| 4. Storage Characteristics |
| When Ni-MH batteries are stored in a charged state, the capacity will gradually decrease (self discharge), and this tendency will be reached greater at high temperatures. However, the capacity can be subsequently restored by charge. Even if the batteries are stored for an extended length of time, if the storage conditions are appropriate, the capacity will be restored by subsequent charge and discharge. Compared with Ni-Cd batteries, the Ni-MH batteries have a higher self-discharge characteristics.
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