The extreme of anything is not good, for apt battery performance overcharging and over-discharging are not good.

A rechargeable battery, being in an electrochemical device, stores energy in chemical form. The continuous input or continuous output from a battery affects battery performance in the wrong way. Optimal charging and discharging keep battery performance at its best. On the other hand, the chemical equilibrium of a battery does not stay stable during overcharging or over-discharging. Subsequently, it turns to raise the internal temperature of the battery and also damages the device powered.


Likewise, leaks from a battery are also related to the same phenomenon of over-discharging, and it permanently harms the battery. This is the same for any battery type or technology, and protection must prevent this.

Overcharging a Battery and Its Effect on Battery Performance

Overcharging means keeping a battery to charge even after it has reached its full capacity. For instance, in Nickel Cadmium (NiCd) battery, a heavier negative electrode gets oxygen from the positive electrode at regular charging. If overcharging the same battery, oxygen takes time to deposit on the negative electrode. This increases the internal pressure of the cell, making it leak or deform. It affects battery performance severely. In a similar case of overcharging in Lithium-ion batteries, they tend to have a temperature rise at the time of overcharging. Deposition of Lithium ions on anode and formation of the internal short circuit causes a high temperature and explosion-like condition in a Lithium-ion battery.

Overcharging affects the performance of the Ni-MH battery. An increase in the internal pressure of the NiMH battery can permanently lose its capacity and cycle life. It is because elevated temperatures due to overcharging causes loss of electrolytes from the battery, causing leakage. The battery performance of even the best rechargeable batteries does not get any better by overcharging them. However, it worsens the battery unless protection is provided inside the battery or outside of it.

Over discharging a battery and its effect on battery performance

Sucking out all the charge from the battery and continuing to do so causes over-discharging of a battery. Over-discharge of current from the battery severely affects the battery performance and even can bring destructive effects to the battery. It demolishes the reversibility of the anode and cathode of the rechargeable lithium battery. In a Lithium-ion battery, the cell heats up, causing a loss in battery capacity. On over-discharging of a Lithium-ion battery, its tolerance to impact and abuse reduces. Similarly, in Nickel Metal Hydride or NiMH battery, over-discharging increases gas pressure inside the battery and damages the electrodes permanently. Again with the proper design and circuitry of a battery, this can be prevented.

Why batteries from BPI?

It takes great research and development to produce world-class batteries. In this regard, BPI is an expert in batteries, and with precision, BPI’s batteries deliver for the profitability of the consumers. BPI manufacture batteries protected from overcharge and over-discharge. With well-described specifications of charging cut-off voltage, maximum charge, and discharge current, the batteries of BPI are smart enough to keep themselves alive even if consumers forgot.

Some of our advantages include:

  1. Safety protection standards: Our batteries specifically have overcharge, over-discharge, over current, and short circuit protection in them. With these safety standards of our batteries like Lithium-ion battery, lithium-ion polymer battery, NiMH & NiZn battery, all have required safety protection standards.
  2. Certifications: Continuous research and development of our products and standard operating procedures in our manufacturing have earned us global certifications like UL, CE, KC, PSE, ROHS, UN38.3, and others.

You can visit our online catalog and get yourself a battery of your choice and collaborate with us for your future energy storage needs. Our products manufactured as per global standards are the right choice for various electricity needs.