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FAQs 

Question 1 and 2

The truth is, power banks can be valuable allies in the fight against running out of juice, but they come with a few caveats. When used incorrectly or too often, these nifty accessories can slowly degrade your phone's battery over time. Ultimately, if used correctly, power banks provide an efficient and effective way to extend your device's battery life without diminishing long-term battery performance.

Yes. 
Unless there's some technical flaw with your battery or charger electronics, using a fast charger won't do your phone's battery any long-term damage.
Here's why. Fast-charging batteries work in two phases. The first phase applies a blast of voltage to the empty or nearly empty battery. This gives you that blazing charge of from 50% to 70% in the first 10, 15 or 30 minutes. That's because during the first phase of charging, batteries can absorb a charge quickly without major negative effects on their long-term health.

You know how it seems to take as long to fill up that last 20% or 30% of the battery as it does to charge the first 70% or 80%? That last part is the second charging phase, where phone-makers have to slow down and carefully manage the charging speed or else the charge process actually could damage the battery.

Our Power Banks have passed all the necessary safety tests and are certified and compliant with FCC / CE and ROHS. We carry out regular rigorous safety checks on all our power banks.  Some of our safety features include:

  • High-quality batteries from leading brands

  • Strong body to protect from bumps and knocks

  • Output over-current and over-voltage protection

  • Input over-current and over-voltage protection

  • High-temperature shut down

  • Short-circuit protection

  • Electrostatic Discharge (ESD) protection

Also, the lithium-ion batteries used in power banks are the same ones used in laptops, phones and tablets.

charging multiple times

This is because when charging fast, your device tends to draw in power from the charger quickly. As a result of this, a lot of heat is generated, which causes the phone to heat up. Hence, even if you have a fast charger, you must use an adapter with a high-voltage amp to tone down the heating.

ChargingNZ products are 2.1 and 3A respectively, which means the ampage is sufficient to handle a fast charge of up to 18watts. Also ChargingNZ products are regularly checked and replaced at about 80% of their lifespan, to ensure the battery does not become faulty (which may be causing the increased heat).

Why it gets hot

It may be safe to do so with certain phones that have protective chips and circuitry to place a phone in a safe mode when the phone overheats. They are now built with advancements to manage heat and control the flow of power going to the battery during a charge. For instance, phones now have heat shields, thermal layers, and even cooling pipes to move heat away from the battery. Further, many phones are now programmed to shut off power once the battery is full, even if it remains plugged in. Phones have charging settings to help them “learn” your behavior in order to optimize charging for when you actually need it, such as holding off charging until about an hour before you wake up.

Reduced Charging Efficiency
Extra heat leads to reduced charging efficiency. This means that you’ll get less out of your power bank’s capacity than expected. The power bank will lose more energy in the process of charging your phone, so in the end, a smaller capacity will end up in your phone’s battery.
So if you’re looking to maximize the amount of power you get from the power bank, the most sensible way would be not to use your phone while it’s being charged.
 
However, charging and discharging your power bank simultaneously may be a disaster! Not only will it cause the battery pack inside to overheat, but also risk damaging its charging port in an exceedingly hazardous way. Avoid this combination of events at all costs - using your power bank safely according to the user manual should always come first.

Safety using power bank

Overcharging used to cause anxiety among phone owners. The fear was that keeping a phone constantly plugged in could charge a battery beyond its capacity, making the battery unstable, which could degrade overall battery life or build up too much internal heat and cause the battery to burst or catch fire.  According to the experts we spoke with, however, a battery's management system is designed to shut off the electrical charge once a battery reaches 100%, before it can overcharge.  

Unless something goes wrong with the battery circuitry, you can't overcharge a modern phone. Remember that you can, however, put a battery under strain as you head to a 100% charge, as detailed above. (It's why electronic-vehicle makers cut off the charge on new batteries around 80%.)

Overcharge a device

No, the phone's internal charging circuit will only draw as much power as it needs. It will not damage your phone.
 
Avoid extreme ambient temperatures. Your device is designed to perform well in a wide range of ambient temperatures, with 62° to 72° F (16° to 22° C) as the ideal comfort zone. It’s especially important to avoid exposing your device to ambient temperatures higher than 95° F (35° C), which can permanently damage battery capacity. That is, your battery won’t power your device as long on a given charge. Charging the device in high ambient temperatures can damage it further. Software may limit charging above 80% when the recommended battery temperatures are exceeded. Even storing a battery in a hot environment can damage it irreversibly. When using your device in a very cold environment, you may notice a decrease in battery life, but this condition is temporary. Once the battery’s temperature returns to its normal operating range, its performance will return to normal as well.

Reduce battery health
References
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