As you run a PowerPRO scan, you might see some surprising reasons your battery is draining so quickly. Here are a few major battery sucks that surprised us.

Your Apps Keep Running in the Background

You might think your apps aren’t running because you aren’t using them, but really, many apps continue to refresh throughout the day. If PowerPRO says that one of your apps is using a lot of battery, you can bet that it’s continuously refreshing. To fix this problem, you can disable background activity on just that app or you can be safe and disable background activity on all your apps.

Your Phone Settings Are Draining Your Battery

Some of the biggest surprising battery-draining culprits are screen brightness and vibrate mode. Conserve battery by turning your screen brightness down — or, if you have a new phone, turning on the setting that lets it change brightness based on its surroundings. Vibrate mode is another problem; instead of putting your phone on vibrate, turn your ringer either off or on.

You’ve Set Your Phone to Automatic Sync

Other apps, especially document creation and photo apps, often back up your documents several times throughout the day. If you find that your battery is draining quickly or that you don’t need to have your files so regularly updated, you can set your phone to only sync manually, when you tell it to sync.

Once you’ve figured out the battery-draining culprits, you’ll be better informed about what apps to remove and what changes to make in order to extend your battery life. If none of these solutions make a difference, though, you likely have a faulty battery on your hands.

Read More: How to Use Free Phone-Charging Stations Safely

Factors to Consider When Using Your Old Phone Charger

Your new phone and your old charger are likely different voltages. New phones will likely recognize old chargers at lower voltages than the charger designed to go with the phone. However, the phone will adjust to the old charger’s voltage, meaning that the phone itself and the battery will not be harmed. However, since the phone is recognizing the voltage as low, it will also charge much more slowly than it would with its new charger.

The problem with using an old charger, too, is that you’ll have to test its voltage if you don’t already know it. If you want to test your phone charger’s voltage, you’ll have to set up an experiment with a multimeter — an experiment that is likely more trouble than it’s worth. It is recommended that if you lose your current charger, you replace it with the charger specifically designed for your phone model for faster charging.

So, what are you supposed to do with all those old phone chargers lying around? If you’re a mechanically-minded person, you could wire up the old charger to power a homemade thermostat. Of, if you don’t want to work on a mechanical project, you could always head to Best Buy. Each location has a bin near the door where you can drop off old chargers or batteries, and they will recycle them for you. Before you go, check Best Buy’s website to make sure they’ll take what you’re trying to recycle. Be warned that you can only recycle so many electronic items per day.

Millions of Americans experience this feeling of helplessness daily, realizing that they cannot continue through their day without their essential pocket-sized computer juiced and ready. While some may argue that we’re too dependent on our devices, that’s precisely why having a fully-charged phone is such a big deal  — whether it’s for something minor like having music to listen to at the gym, or for more important things like calling your parents or your spouse, there are few times during your day when you don’t rely on your mobile device.

Read More: The Best Battery Packs to Use on the Move

This is where mobile chargers come in handy. Having a fun-sized AC outlet in your purse or pocket means you can go longer without having to stay stationary and bound to a USB cord. Of course, most people don’t want to be bound by a USB plug at all, even when moving. Mobile chargers can get tangled by moving arms, get caught on objects and passersby, and aren’t exactly the most fashionable accessory to have on your person. If this is something that matters to you, we recommend a mobile charger that requires the least time possible to get you off the cord and on to whatever your day has in store.

Regardless of whether you’re Team Apple or Team Android, some chargers work great for both. The Aukey Quick Charge 2.0 is one such charger, which sports a 10,000 mAh battery and USB ports for two. The drawback? It can only charge one smartphone quickly at a time. Still, what makes this device worthwhile is it’s price tag — at only $30, it’s an effective, ergonomic solution for the amount of power it packs. If that’s not enough juice for you, there’s the iBattz Mojo Battstation Optimus Charger. This behemoth of a battery holds 20,400mAh of charge and can power two phones at once. Though it carries an $80 price tag and requires up to 16 hours to fully charge, there’s no battery on the market at that price point that lasts longer or charges smartphones faster.

The Fastest Android Chargers
For those of you relying solely on Google’s OS, there are quite a few charger models that are ideal if you’re under time constraints. The Qualcomm Quick Charge 3.0 can charge some devices up to 80% in approximately 35 minutes, but phones with a 9V/2A charger will experience the best results from this brand and model. Still, the Quick Charge is quite efficient with its charge consumption, and is all but guaranteed to remain cool while your phone is connected. Additionally, for those of you who are mindful of the environment, there’s the EasyAcc Solar Power Bank. While this is most effective for daytime use, the Solar Power Bank can charge two Androids at once, and can charge up to 350mA on sunny days. Though it’s (relatively) slower than the other models mentioned, it’s a device you don’t want to sleep on.

Though a good power pack goes a long way, so too does a great battery-conserving app. Fortunately, PSafe has an app that does exactly that; give the PowerPRO app a try, and never worry about a low-battery night out again.

Flux Portable Charger
At only $30, this portable charger is extremely pocket friendly. It’s only 7.8mm thick, with 108 x 62.8mm dimensions. It only takes about 3 to 4 hours to fully charge this device. Additionally, the device contains enough power to recharge your phone once, and maybe even twice if you’re efficient. There is a button on the side that you can push to see the battery power of the portable charger. However, one of the glaring cons is that this device takes over 2 hours to completely charge the battery of the Samsung Galaxy S7.

Read More: Everything You Need to Know About Wi-Fi Calling

RAVPower Portable External Battery Charger
While this charger contains more USBs than the Flux Charger, it is much bulkier. While it is certainly possible to take on the go, it could burden your pocket. Despite its bulky size, it offers a very efficient charge. This charger also contains three output ports, so you can charge multiple devices at the same time. Your laptop and tablet can also be charged by the powerful charger. At $60, it isn’t as economical as the Flux.

ZeroLemon ToughJuice Rugged Portable Charger
If you’re going on a hike in the middle of nowhere and you need a powerful device to charge all of your electronic devices, then look no further. With a 30,000 mAh capacity, this charger can keep your devices going for days. The Galaxy S6 can be charged up to seven times on this device. Although the ZeroLemon weighs 14.1oz, you can’t expect a device of such high power to be light. It can also take up to 24 hours to fully charge this product. At $75, this device should only be sought by those who absolutely need their electronics on the road when they’re off the grid.

Braven BRV-BANK Rugged Portable Battery
If you need a portable battery that can survive being mauled by a bear in the wilderness, then this charger is right up your alley. It is water resistant and successfully met the military drop test. This means it can withstand hard falls with ease. It costs $100, but it’s well worth the price considering its durability and 6,000 mAh battery.

To ensure that your phone runs for as long as possible before you break out your portable chargers, download PSafe’s PowerPro.