After purchasing a certain type of charger, many are faced with the problem of how to properly recharge it? One of the main types are nickel-metal hydride (NiMh) batteries. They have their own peculiarities of how to charge them.
How to properly charge a NiMh battery?
The peculiarity of NiMh batteries is their sensitivity to heat and overload. This can lead to negative consequences that affect the ability of the device to hold and deliver a charge.
Almost all batteries of this type use the "delta peak" method (determining the peak of the charging voltage). It allows you to indicate the end of the charge. The property of nickel chargers is that the voltage of the charged NiMh battery begins to decrease by some insignificant amount.
How to charge a NiMh battery?
The "delta peak" method is able to work well with charge currents of 0.3C or higher. The value of C is used to indicate the nominal capacity of the rechargeable aa ni NiMh battery.
Thus, for a 1500 mAh charger, the delta peak method will work reliably with a minimum charge current of 0.3x1500 = 450 mA (0.5 A). If the current is at a lower value, there is a great danger that at the end of the charge, the voltage on the battery will not begin to decrease, and it will hang at a certain level. This will cause the charger to not detect the end of the charge. As a consequence, there will be no disconnection and continue reloading. The capacity of the battery will decrease, which will adversely affect its operation.
Currently, almost all chargers can be charged up to 1C. In this case,
To extend the life of the nickel-metal hydride charger, you can recommend storing it with an insignificant amount of charge (30-50%).
Thus, the correct charging of the nickel-metal hydride battery will favorably affect its operation and help it to function normally.