In the early days of mobile telephony, there were certain habits that were essential to adopt if you were penalized for draining the already weak battery of the early phones. Those who enjoyed these years of revolution in terms of telecommunications will be well aware of the term “memory effect” of batteries, a phenomenon that ruined the lifespan of the first mobile phones on the market. As a result, the battery degraded prematurely if full charging cycles were not carried out – i.e. up to 100% of its capacity. This affected the first generation of batteries, but was completely overcome with the lithium-ion batteries that are widely used today.
We are reviving this memory because even today there are voices advising against partial charging in mobile phones and the issue of batteries has become one of the myths that still captivate many users. Which beliefs are still established in the market? These are the most popular:
Myth 1: It’s not good to charge your phone overnight
It’s one of the most ingrained beliefs and there are still those who charge the phone and unplug it at full speed when the battery has reached its maximum charge. This is not necessary as modern phones (and especially their platforms) have charging management systems that prevent possible deterioration. The main problem that a mobile phone connected to power could face is overloading; This means that the charger will continue to supply power to the battery when it has already reached its maximum capacity. But there is no risk of overloading with modern mobile phones.
Today’s phones have intelligent charge management systems, so the extra power draw is cut off when the battery reaches its maximum. Apple even has an optimized charging system which takes into account the user’s charging habits and cuts off the power supply when it reaches 80% charge and then resumes it so that it reaches 100% when the user wakes up. Samsung, meanwhile, confirms that currently used batteries are not affected by what they call “charging myths”. “The negative effect that excessive charging over a long period of time can have is negligible,” explains Santiago Izquierdo, Product Technical Director at Samsung Electronics Iberia, “yet the phone stops charging when it reaches 100%; charging stops and recharges when it drops below 100%.”
“Generally, batteries are replaced due to natural degradation and only on high-end models. It is very difficult to damage a modern battery by charging it incorrectly”, Javier Sánchez-Romero, CEO of to be mobile, company dedicated to cell phone repair. In short, you can easily leave your phone on the charging station before bed.
Myth 2: You need to force close applications to optimize performance and battery
As with the battery, there are beliefs so ingrained that they survive through the years, such as: rant the app for suspecting that there is some process running in the background that is hogging the battery and affecting performance. But reality once again stubbornly shows the opposite: mobile phones are not only smart enough to manage these resources, they also change that management by enforcing closure app it can only make things worse. This misconception went so far that even Craig Federighi, head of iOS – the iPhone operating system – he denied it in an email in response to a customer.
systems “sleep” app that are not in use and park them until reopened if the user requests it; when it is reopened at the user’s request, part of the processes are already started, which saves resources. That is, forcing a full shutdown forces the system to reload everything, and the paradox is that more resources are consumed than just being modified app. “It is not necessary to close each application after use,” explains Izquierdo, “leaving it open speeds up the launch the next time you use it, since it does not have to be reloaded,” he confirms.
Myth 3: It’s better to turn off Wi-Fi and Bluetooth to save battery
Apple suggests as advice on its website, always have WiFi on Save battery: “There are two very simple ways to save battery: adjust the screen brightness and use Wi-Fi.” Why can leaving WiFi on help us save battery? This wireless technology is more resource efficient than the direct data connection with the operator. That on the one hand, but on the other hand, modern mobile phones use this wireless connection to geoposition the device instead of GPS, which consumes more battery and only activates when an application that requires it is opened.
The same goes for the new Bluetooth versions, which are designed to have negligible battery impact. In consumer tests, when enabled and disabled, no differences. If the Bluetooth connection is actively used, for example for listening to music, the consumption here naturally affects the battery performance.