Why does my NiMH battery always show no power?

NiMH batteries have a memory effect.

If you use a universal charger, it is very likely that the battery has not been fully charged before, so no matter what charger you use in the future, even if the display is full, but in fact your battery has not been fully charged, so the battery you said will not last long and there is no power!

Therefore, nickel-metal hydride batteries still have to be charged with regular special chargers.

As fossil fuels are becoming less and less exploited by human beings on a large scale, the development and utilization of hydrogen energy has received increasing attention in recent years.

NiMH batteries have attracted more and more attention as an important direction for hydrogen energy applications. Although the nickel-metal hydride battery is indeed a battery with good performance, the vertical collapse of the nickel-metal hydride battery for aerospace is a high-voltage nickel-metal hydride battery (the hydrogen pressure can reach, that is, 40kg cm2), such high-pressure hydrogen storage in a thin-walled container is easy to use, and the nickel-metal hydride battery also needs to be used as a catalyst, making its cost very expensive, which is difficult to accept for civilian use, therefore, foreign countries have begun to explore civilian low-voltage nickel-metal hydride batteries since the 70s.

NiMH batteries are divided into high-voltage NiMH batteries and low-voltage NiMH batteries. The high-voltage nickel-metal hydride battery was first developed by the United States in the early 70s of the 20th century. The trend has taken shape to replace nickel-cadmium batteries with nickel-metal hydride batteries and apply them to various satellites.

Millions of car purchase subsidies.

NiMH battery charging method.

The scientific charging method can extend the service life of NiMH batteries.

In general, new NiMH batteries have very little power and need to be charged before they are used.

However, if the battery has a short factory time and has enough power, it is recommended to use it first and then recharge. New NiMH batteries generally need to be charged and used 3-4 times before their performance can be optimal.

Although the memory effect of nickel-metal hydride batteries is small, it is best to recharge them after each use, and they are fully charged at one time, not charged for a while and then charged. This is an important point of "longevity".

When charging, pay attention to the heat dissipation around the charger.

It doesn't matter, nickel-metal hydride batteries have no memory effect, charge as much as you want.

The battery voltage is normal, which is a bit strange, and I think we should rule out operational problems like not installing the battery properly.

The most likely reason is: the minimum working voltage of the toy is high, higher than the battery voltage after the NiMH battery is charged, the working voltage of the dry battery is generally around, and the working voltage of the NiMH battery is generally in, so the NiMH battery cannot work.

Excuse me: With a nickel-metal hydride battery installed, the toy does not react or does it not move after a few clicks? Or is it something else?

There is also an unlikely possibility that the positive electrode protrusion of the NiMH battery is too low to make effective contact with the positive spring blade in the toy battery slot and not work.

You take a closer look.

It's broken, caused by repeated charging and aging, the life is almost up, and it should be replaced The number of charging and discharging has reached a certain design requirement, and it is time to replace it.

There are many reasons, the most common ones:

In the case of a large degree of short circuit, the voltage is almost 0, and the charging cannot restore the voltage to normal, which is manifested as a failure to charge. To a lesser extent, in the case:

The voltage is almost 0, but the voltage returns to normal after charging, and the battery is used immediately after charging, and the power can be discharged, but it is not used immediately after charging, and after a period of time, the voltage becomes about 0 volts.

Once this situation occurs in the battery, it indicates that the battery is damaged and cannot be used normally.

Refer to it.

The output current of your charger can be calculated according to 105mA, which belongs to a slow charging charger, and the charging correction parameters can be taken.

850mA battery charging time = 850 105*, so, you should control the charging time is 10 hours.

The charging time of a 1800mA battery = 1800 105*, so the charging time of your No. 5 battery is 21 hours.

The above charging time is the charging time for your battery to run out of power and recharge.

Depending on your charger, it's best to recharge your battery when it's out of power.