How Often Should I Charge My Phone To Prolong The Battery Life?

09 September 2017

The batteries of mobile phones are manufactured from lithium-ion electrolytes and they are meant to last for about 3 years which makes them far better than the older Nickel based mobile phone batteries.

Samsung battery

The battery life of a phone is limited and it can be defined as the duration a fully charged phone battery lasts before it is fully discharged to 0%. Battery life is a measure of battery performance and longevity which can be quantified in several ways such as; the runtime on a full charge or as; the number of charge cycles until the end of useful life. Batteries are always designed to meet up to the energy consumption of the phones.

Before we get to the main question “How often should I charge my phone to prolong the battery?” let’s get to know more about how phone battery works.

How does Phone battery work?

A lithium-ion battery is the most common phone battery type and they are a type of rechargeable battery in which the lithium ions in the electrolyte undergo both forward and reserve reactions as they move from the negative electrode to the positive electrode during discharge and back when charging. The charging procedures for Li-ion phone batteries is always in three stages;

  • Constant Current Phase: At this phase, the charger applies a constant current to the battery at a steadily increasing voltage until the voltage limit per cell is reached.
  • Balance Phase: At this stage the charger reduces the charging current while the phone battery cell’s State of Charge (SoC) are brought to the same level.
  • Constant Voltage Phase: Here, the charger applies a voltage equal to the maximum cell voltage times the number of cells in series, as the current gradually declines towards 0.

Now to the main question

At what percentage should I always recharge my phone battery?

Phones nowadays have inbuilt power management application systems and the most common ones always indicate when to recharge the phones. Most phone OEM devices such as Innjoo, Samsung, Infinix, Tecno, Apple I-phones etc. always alerts the phone user to charge the phone once the battery drops to 15%. Therefore ensuring the phone battery does not drop below 15% or below the phone battery management application’s alert level can improve the battery life before it exceeds the manufacturer’s rated charge cycle. Generally, the charge cycle for most phone batteries is between 500 – 1500 cycles.

However, it will be better if you keep to the common 40% – 80% rule. The rule states that to prolong the phone battery life, keep the battery always charged between 40% -80%.

It should however be noted that as opposed to common opinion, it is not bad to leave your phone plugged even at 100%, the reason is that most battery nowadays have smart control circuits. These circuits control the various charging procedures of the phone battery. So at full charge the circuit cuts off power supply to the battery and the phone charger powers the battery directly.

Also there are some smart charger products on the market out there that provide efficient and fast charging processes that are healthy for your phone battery. Some can be found on our Indiegogo website and the links are shown below;

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