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  • Name: VC2S
  • Upgraded colorful VA LCD screen tells you real-time charging status!

    • Intelligent Visible Experience

    • Micro-USB powered, charge anywhere

    • Internal Resistance Testing

    • Portable Power Bank Function

    • Battery Type Auto-identification

    • 0V Activation Function revives over-discharged battery

    • Soft Start& TC-CC-CV Three-Stage Charging

     

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Q&A

1. Q: Why the current gear is 2A while real current is less than 2A?

    A: Generally the voltage on dial can be referred at this time. If the voltage is 4.2V, which means that the charger starts Constant Voltage charging, to prevent battery from discharging, the current will decrease gradually until it becomes 0 and the battery is fully charged.

 

2. Q:Why some batteries are 2A charged, while some are only 1A charged?

    A: This charger will select suitable current automatically after testing battery internal resistance. The most important index that will affect batteries’ charging and discharging rate is not the size, but internal resistance. Some small batteries can also support charging and discharging in a large current.

 

3. Q: Why do I get different internal resistance values after my battery has been tested several times?

    A: First of all, the charger tests resistance only when battery is inserted in the slots. Please make sure that battery is inserted correctly in the slots, otherwise the tested resistance would have great deviation. Second, it tests resistance by current pulse; when voltage is extremely low, the battery voltage varies greatly, so the tested resistance will probably be higher. The most suitable testing voltage is 3.6V~3.8V. Besides, when the voltage is 4.16V above, to avoid discharging, the testing will be interrupted and there will also be deviations.

 

4. Q: Why is the tested battery capacity lower than nominal value?

    A: To test batteries’ nominal value, people need to discharge the battery using 0.2C until the voltage becomes 2.75V, and then recharge it using standard 0.2C charging. The cut-off voltage of most devices that use batteries is 3.6V~3.8V, in order to avoid over-discharging, that’s to say, 10%~20% capacity is not released when discharge. Therefore, the tested charging capacity would definitely be less than nominal value.

 

5. Q: Why do Ni-MH batteries get a little hot after being fully-charged?

    A: The way that Ni-MH batteries get fully-charged identified is unusual---that is by identifying the change of negative voltage and zero voltage after Ni-MH batteries are fully charged. During this time, the battery doesn’t save the power, but transfers charging power to heat by some chemical reaction. Some high-quality Ni-MH batteries will soon get negative voltage, while for some others, this process will keep for a while, that’s why they get hot. But that is normal and will not damage the battery.

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