
If you're looking to save your phone battery when there's no electricity, there are several options to consider. Firstly, you can utilise alternative power sources such as solar power, portable chargers, or even hand-crank chargers. Conserving your phone's battery life is also crucial; this can be achieved by minimising screen time, reducing brightness, turning off non-essential features like Bluetooth and Wi-Fi, and disabling background apps. Additionally, utilising power-saving modes like Airplane mode and Low Power Mode can significantly extend your battery life. Keeping your phone cool and avoiding extreme temperatures is another effective way to preserve battery life. Lastly, when planning outdoor activities, it's advisable to bring backup battery packs and portable power devices to ensure your phone stays charged.
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What You'll Learn

Use a portable power station, solar power, or a car charger
If you have access to a car, you can use a portable power station to charge your phone. Many power stations can be recharged by plugging into a 12V car, truck, RV, or boat outlet (cigarette lighter outlet). This lets you charge your phone while driving or travelling. Simply use the station's charging cable with the vehicle's 12V outlet, ensuring the vehicle is on to prevent draining the battery. Car charging is slower, often taking 10-15 hours for a 500Wh station, but it's a convenient way to trickle charge over long trips. You can also use portable gas generators to provide engine-powered AC to recharge stations.
Alternatively, you can use solar power to charge your phone. There are setups with direct connections to a photovoltaic panel, a portable power pack with built-in photovoltaics, and portable solar generators for faster and more reliable charging speeds. The solar generator is the best portable photovoltaic charging method for most situations, as it offers fast charging capabilities and recharges quickly using photovoltaic panels. The EcoFlow RIVER 2 Pro Solar Generator (PV220W) is a popular option, with a 768Wh capacity and weighing only about 7.8kg.
You can also recharge phones directly from a small portable photovoltaic panel via a 12V cigarette lighter plug adapter, or there may be USB ports you can use directly or with another adapter. However, keep in mind that cloudy days can reduce your charge to near zero, and some phones must be reset each time this happens.
Another option is to use a car charger to charge your phone directly. You can plug your phone charger into the cigarette lighter outlet in your car. However, if you switch off your engine, remember to unplug your phone promptly, especially in small cars and/or with old batteries, as you may have problems starting the car again. Ensure that the charging cables you use are in good condition and of good quality. It is recommended to use charging cables of the same brand as your phone to ensure compatibility and prevent overloading.
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Turn on Low Power Mode and dim the screen
If you're looking to save your phone's battery when you don't have access to electricity, one of the simplest ways is to turn on Low Power Mode and dim the screen.
Low Power Mode is an effective way to extend the battery life of your iPhone when it starts to get low. You can enable it manually by going to Settings > Battery. Alternatively, your iPhone will notify you when your battery level goes down to 20% and 10%, and you can turn on Low Power Mode with one tap. When activated, Low Power Mode reduces display brightness, optimises device performance, and minimises system animations. Apps like Mail will not download content in the background, and features like AirDrop, iCloud sync, and Continuity will be disabled. However, you can still use essential functions like making and receiving calls, emails, messages, and accessing the internet. Once your phone is charged, Low Power Mode automatically switches off.
Additionally, dimming your screen can help preserve battery life. Adjust the brightness to the lowest comfortable level. For instance, when watching a video in a dark environment, you may not need full brightness. Many smartphones, like Samsung Galaxy devices, have a feature that uses the front camera to detect when to dim the screen or turn off the display. This is often linked to the device's proximity sensor, which detects when your phone is close to your face during a call. You can also manually adjust the brightness in your display settings.
Other methods to save your phone's battery include turning off non-essential features like Bluetooth, Wi-Fi, and Location Services, as well as minimising screen time and ensuring no non-essential apps run in the background. If you're in a bind, you can also use alternative power sources like portable chargers, solar power, or hand-crank chargers to charge your phone when no electricity is available.
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Turn off Location Services, Wi-Fi, and Bluetooth
Turning off Location Services, Wi-Fi, and Bluetooth can help extend your phone's battery life.
Location services, such as GPS, constantly communicate with satellites to provide location-based information. This can quickly drain your phone's battery, especially if combined with other factors such as weak signal strength or too many background apps. To turn off location services, go to Settings > Privacy > Location Services, and toggle the switch off for each app that you don't want to access your location. Alternatively, you can enable Low Power Mode on your iPhone, which will automatically minimize location services' usage, among other battery-saving measures.
Wi-Fi also consumes power, even when you're not actively using it to connect to a network. If you're in an area with a weak cellular signal, your phone may be working harder to maintain a connection, draining the battery. Turning off Wi-Fi when not in use can help preserve battery life. Additionally, you can set up an automation on some phones to turn off Wi-Fi when you connect to a trusted network, ensuring you're only using cellular data when necessary.
Bluetooth is another feature that uses a significant amount of power, especially when actively transferring data. Turning off Bluetooth when not in use, such as when listening to music or transferring files, can help extend your phone's battery life.
By selectively disabling these features, you can make a significant difference in how long your phone's battery lasts, especially in situations where you don't have immediate access to a charger.
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Avoid extreme temperatures and direct sunlight
Extreme temperatures and direct sunlight can negatively impact your phone's battery life and performance. High temperatures increase the chemical activity inside a battery, affecting its service life and causing corrosion. According to the "rule of thumb" or the law of "Arrhenius," the corrosion rate doubles for every 10° C increase in temperature, halving the battery's lifetime. Therefore, it is advisable to avoid placing your phone in direct sunlight or exposing it to high temperatures for prolonged periods.
On the other hand, cold temperatures slow down the chemical reactions within the battery, reducing its ability to store and transfer energy. This is especially true for lithium-ion batteries commonly found in smartphones. Cold temperatures can lead to unexpected shutdowns as the battery's capacity to provide power decreases, and the liquid electrolytes inside can freeze, rendering the battery incapable of powering the device.
To prevent damage caused by extreme temperatures, maintain your phone's temperature between 32°F and 95°F (0°C and 35°C). If your phone is exposed to high temperatures, avoid charging it until it has cooled down to avoid straining the battery and the system. Similarly, refrain from charging your device when it is extremely cold, as this can cause lithium plating, permanently degrading the battery's capacity.
If you're in a cold environment, consider keeping your phone in an insulated pouch or pocket to retain warmth and protect it from the cold. Additionally, limit your screen time, reduce brightness, and turn off non-essential features like Bluetooth and Wi-Fi to conserve battery power.
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Use Airplane Mode when there's no cell coverage or low signal
When you're in an area with no cell coverage or low signal, your phone will continuously try to search for a better signal, draining your battery in the process. By turning on Airplane Mode, you can prevent this from happening and conserve your battery life.
Airplane Mode temporarily disables your phone's cellular and Bluetooth radios, which are responsible for wireless communication. When your phone can't find a signal, it keeps activating these radios to search for one, using up valuable battery power. By turning on Airplane Mode, you're essentially shutting down your phone's wireless reception, so it no longer spends energy searching for a signal.
This is especially useful when you're in areas with no cell coverage, such as a parking garage, library basement, subway, or rural areas. By switching to Airplane Mode, you can save your phone from constantly searching for a signal and prolong its battery life.
Additionally, Airplane Mode can be beneficial when you're using certain apps that don't require constant connectivity. For example, if you're using a navigation app that relies solely on GPS, you can keep it running while in Airplane Mode, preserving your battery while still being able to use the app. Similarly, you can use your phone's camera, play locally stored music or videos, and edit documents without needing a cellular connection.
However, it's important to note that when Airplane Mode is enabled, you won't be able to make or receive calls, texts, or emails unless you have a WiFi connection. So, if you need to stay connected for important communications, you'll need to turn off Airplane Mode periodically. Nonetheless, Airplane Mode is a valuable tool to extend your phone's battery life when dealing with low or no cell signal.
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Frequently asked questions
You can use a portable charger, a power bank, or a solar charger. If you're in a car, you can use a car charger, but be careful not to discharge your car battery too much. In an emergency, you can use a hand-crank charger.
Minimise screen time, reduce brightness, and turn off non-essential features such as Bluetooth and Wi-Fi. You can also prevent apps from running in the background, and turn off push notifications for apps.
Try not to let your phone battery fall below 20%, and avoid charging it beyond 80-90%. Charging from 0% to 100% repeatedly can shorten the lifespan of your battery.
On iPhones, you can enable Low Power Mode, which reduces display brightness and minimises system animations. On Android phones, you can enable "Wise" charging in the battery settings. You can also turn off Location Services and push notifications for specific apps.
Keep your phone out of direct sunlight and remove it from its case, as cases tend to trap heat. If you're in a cool environment, you can store your phone in an insulated space, such as inside your pack surrounded by clothing.











































