AA or AAA batteries commonly used in electronic gadgets vary in size and voltage specifications. Nickel-metal cells such as nickel hydrogen (Ni-Hi) batteries are rechargeable and are practically used for many devices including digital cameras, mobile phones portable media players and even some solar gadgets.
Like nickel-cadmium (Ni-Cd) and nickel-metal hydride (Ni-MH) batteries, nickel hydrogen batteries use rare earth metals. While each one varies in their charge and discharge capacity, self-discharge rate and shelf life, these nickel metal-based batteries are generally more stable compared to lithium-ion (Li-ion) batteries.
Instructions
1. Check the battery indicator on your device to determine if you need to recharge your Ni-Hi batteries. Remove them from the device for recharging.
2. Place the batteries into the charger. Make sure that the positive and negative ends are in the correct positions.
Depending on the number of batteries to be charged, you may have to double your target time to finish charging more than one set.
3. Plug the charger into a wall outlet and check the light indicator to ensure that the batteries are charging accordingly. Most chargers feature a red light indicator that confirms the recharging of the batteries and a yellow or green light that indicates that batteries are fully charged.
4. Monitor the charging time. Depending on both the battery and the charger, charging time may be anywhere from one hour to a few hours. Refer to the specific instructions coming with your battery, electronic device or charger for the required charging time.
5. Unplug the charger and remove the batteries once the indicator shows that the batteries are already fully charged. Since the batteries are typically hot after charging, exercise extreme care when removing batteries from the charger. It is best to wait for a few minutes after unplugging the charger before removing the batteries. For safety, you may also use a small cloth, cardboard or paper to lift the hot batteries from the charger.
6. Insert the newly charged batteries in your electronic device.
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