How low should I discharge a NiMH battery?

NiMH cells start at about 1.5 V right when fully charged, drop to about 1.2 V most of their discharge life, and are pretty much empty at 900 mV. Stopping there is usually safe. 800 mV is where you definitely want to stop to avoid damage.

Do NiMH batteries discharge?

At normal room temperature, NiMH batteries can generally retain 70% of their charge after 30 days. Normal self discharge of NiMH batteries is about 1 percent per day at normal room temperature. Lower temperatures (40° to 60° F) on the other hand will cause NiMH Batteries to hold their charge longer.

Why do NiMH batteries self discharge?

NiMH self discharge cause There are several factors that contribute to the self-discharge of an NiMH cell dependent upon the state of charge. These can broadly be described as an oxygen cycle that occurs at high states of charge, and then ion movement that contributes to the self-discharge over longer periods of time.

How do I stop myself from discharging?

How to reduce self-discharge. As with many chemical reactions, the rate and intensity at which it happens is influenced by the environment. Colder temperatures are generally better, since the cold slows down the chemical reaction, thereby reducing any unwanted battery self-discharge.

How long will NiMH batteries last?

The true advantage of NiMH batteries can be found in the cycle life (reuse after charging). Typically NiMH batteries can be recharged hundreds of times, potentially allowing them to be equivalent to hundreds of alkaline batteries in total service over their lifetime. However, battery life is limited to 5 years or less.

How long do NiMH batteries last?

Typically NiMH batteries can be recharged hundreds of times, potentially allowing them to be equivalent to hundreds of alkaline batteries in total service over their lifetime. However, battery life is limited to 5 years or less.

How do I know if my NiMH RC battery is bad?

If your RC battery is swollen or has less than 80% capacity then it is considered to have gone bad. You can still use a NiMH battery that is below 80% without any issues besides shorter run time but once a battery has started to swell up it should not be used ever again.

How much should I discharge a NIMH?

The problem with shallow discharges for NiCd and NiMh cells, is that the crystals left during the shallow discharge tend to bond together and create problems. Because of this, it is recommended to do a 100% discharge every 25 charge/discharge cycles. The full discharge breaks up the crystals and everything goes back to normal.

What is the fully charged voltage of NIMH Batteri?

As we know, For ni-mh battery ,the fully charged voltage will become higher after some cycles. So, the 9V 180 mAHr NiMh battery can be fully charged controled by the 9.0 volts terminal voltage ,and 20mA when the ni-mh battery is new .but, after some cycles the fully charged voltage will be higher than 9.0V.

How to calculate battery discharge rate?

How to Calculate Battery Discharge Rate Calculating Discharge Rate. You can use Peukert’s law to determine the discharge rate of a battery. Understanding Battery Capacity. Battery Discharge Curve Equation. Battery Discharge Calculator. Capacitor Charging and Discharging Applications.