Update 1: Added “How to disable fast charging and fast wireless charging on Galaxy S7 and Galaxy S7 edge?” section.
After getting your Galaxy S7 or S7 edge, you need know how to charge Galaxy S7 battery properly. This Galaxy S7 online user guide explains to you everything you need know on how to charge Galaxy S7 battery so that you can enjoy your Galaxy S7 and Galaxy S7 edge.
Remember Galaxy S7 and Galaxy S7 edge have non-removable battery. You cannot carry a spare battery for Galaxy S7 or S7 edge.
Although Galaxy S7 is mentioned in the page most of the time, this guide also applies to charging Galaxy S7 edge battery equally.
4 Different ways to charge Galaxy S7 battery
Galaxy S7 and Galaxy S7 have a battery with larger capacity (3000mAh and 3600mAh respectively) than Galaxy S6 and S6 edge. So, it may take slightly longer time to charge Galaxy S7 battery and Galaxy S7 edge.
There are 4 different ways to charge Galaxy S7 battery depending on the charger type:
- use a normal charger (wall charger like this one or car charger or even your PC) with an USB cable.
- use an adaptive charger (fast charger) with an USB cable.
- use a wireless charger to charge Galaxy S7 battery without using any cables (to the phone).
- use a fast wireless charger (e.g., this one).
So, there are at least 4 types of chargers can be used to charger Galaxy S7 battery (and Galaxy S7 edge battery as well):
- normal wall charger or car charger. For example, you can still use Galaxy S5 charger for Galaxy S7. These chargers charge Galaxy S7 at constant voltage (5v). The maximum current is limited by the charger and regulated by the phone depending on battery status (e.g., temperature, battery capacity…). So, the charging time depends on the current output of the charger and phone conditions.
- adaptive charger (fast charger). This is the charger included in the Galaxy S7 box. Galaxy S7 and Galaxy S7 edge support Qualcomm fast charge 2.0 (but not the latest 3.0). So, in addition to Samsung’s adaptive charger, other vendors’ fast charger may also work with Galaxy S7 and S7 edge. Fast charger can reduce the charging time significantly. When the battery capacity is less than about 60%, higher voltage (9V) will be applied and the charging power can be up to 15W. You may feel the Galaxy S7 battery is quite hot. Don’t be panic because Galaxy S7 and S7 edge have their own overheating control mechanisms.
- Qi/PMA wireless charger. Galaxy S7 and S7 edge support both Qi and PMA wireless charging standard. So, most wireless charging pad in the market should work with Galaxy S7 and S7 edge. If you concern about compatibility, you can always get a Samsung wireless charger for Galaxy S7.
- Fast wireless charger. Currently, only Samsung offers fast charging through wireless charger. It is better to get a Samsung branded fast wireless charger
Charging time depends on both of the charger specs and Galaxy S7 status.
Normally, the charging time (to fully charge Galaxy S7 battery) from short to long is: adaptive charger (fast charger), normal wall charger with 2.0A output, fast wireless charger, normal wall charger with 1.5A output, wireless charger, wall chargers with less than 1A output.
How to charge Galaxy S7 battery with wall charger
Step 1: Connect USB cable to Galaxy S7
Insert USB cable to the micro USB port (multipurpose jack) in the bottom of Galaxy S7 or S7 edge as shown below.
Please make sure the USB cable is inserted tightly.
Step 2: Connect the other end of USB cable to the wall charger
Again, it is important to insert the cable tightly. If the USB cable is not fully inserted into the charger, the charging can be very slow.
Step 3: Plug the charger into electric socket and power on the charger.
There is no requirement on whether you use a socket on the wall or use an extension cord. As long as the voltage is correct, the wall charger should work.
Step 4: Wait till Galaxy S7 is fully charged.
When Galaxy S7 is being charged, the LED will turn red. In the lock screen, it should indicate “charging”.
When Galaxy S7 battery is fully charged, the LED will turn green. In the lock screen, it should indicate “charged”.
Please note, 100% does NOT mean fully charged. 100% is just an estimation (by the software). Fully charged is a physic state of the battery. You should wait until the LED turns green. It usually take a few more minutes from 100% to “charged”.
You should avoid to use Galaxy S7 heavily when it is being charged. But it is absolutely not necessary to power off the phone to charge Galaxy S7 battery.
Step 5: Disconnect the USB cable from Galaxy S7 and power off the charger.
Wall chargers normally have no mechanisms/switches to cut off current output. When the battery is fully charged, a trickling current must be maintained. This may cause unnecessary strain for the battery.
So, if convenient, you may consider disconnecting the USB cable from Galaxy S7 after it is fully charged.
How to charge Galaxy S7 battery with a wireless charger and fast wireless charger
Step 1: Power on wireless charger.
Most wireless charger include a charging pad and a power adapter. You need connect the charging pad to the adapter with USB cable.
Then power on the adapter.
Step 2: Place the center of Galaxy S7 back on the center of the wireless charger as shown below.
You may refer to Galaxy S7 layout to find out the rough location of the wireless charging coil.
Normally, the charging pad will display a color to indicate that charging Galaxy S7 is in progress. Of course, this depends on individual brand.
Step 3: Wait till Galaxy S7 is fully charged.
When Galaxy S7 battery is fully charged, the wireless charging pad usually change color, for example, for Samsung wireless charging pad, the blue color indicates wireless charging is in progress, and green color indicates Galaxy S7 is fully charged.
If you are using a fast wireless charger to charge Galaxy S7 or S7 edge, do not block vents (many small holes) near the bottom of the charging pad.
Step 4: Remove Galaxy S7 from the wireless charging pad.
Normally, it is safe to leave Galaxy S7 on the charging pad because wireless charger will cut off current supply when Galaxy S7 battery is fully charged.
On using Galaxy S7 fast charging
You can use fast charger (adaptive charger) to charge Galaxy S7 to reduce the charging time.
With the bundled adaptive charger, you can charge Galaxy S7 battery from 0 to 60% within 30 mins. So, Galaxy S7 fast charging is a nice feature for many owners.
But there are some misunderstanding on Galaxy S7 fast charging and Galaxy S7 edge fast charging.
I hope this list will help you understand and use fast charging to charge Galaxy S7 battery properly:
- Galaxy S7 fast charging requires a fast (adaptive) charger.
- Galaxy S7 fast charging is used only when battery level is less than 60%. If the battery level reaches above 60%, the charging is similar to use normal wall charger with 2A current output.
- You need insert the cables tightly into Galaxy S7 micro USB port and the adaptive charger.
- You need a quality USB cable. The wires in some poor quality USB cables may be too thin and lead to longer than expected charging time. In worse case, such poor quality cable may cause fire.
- When Galaxy S7 fast charging is active, you should see a notification on the phone.
- When Galaxy S7 fast charging is active, Galaxy S7 may feel uncomfortably hot. But it should be safe as Galaxy S7 and Galaxy S7 edge have own mechanisms to prevent overheating.
- Galaxy S7 fast charging generally will not affect Galaxy Sy7 battery life noticeably. It may only have marginal impact on your battery life. You should not worry too much on such impact.
- You can plug the fast charger into any electric sockets as long as voltage is correct. Fast charger does NOT require a wall socket.
- Charging speed is controlled by the phone based on operating conditions.
- If your wireless charging pad does not include an power adapter, you can use the bundled adaptive fast charger for the wireless charging pad.
On using Galaxy S7 fast wireless charging
Currently most wireless chargers can deliver about 1A current to the battery. Fast wireless charging means the wireless charging pad can deliver higher current and therefore it can charge Galaxy S7 battery faster. For example, Samsung’s official fast wireless charger (link) can deliver about 1.5A current to Galaxy S7 battery.
This means there could be up to 50% increase in charging speed compared to normal wireless charging.
Samsung first introduced fast wireless charging in Galaxy Note 5 and Galaxy S6 edge+. Now, Galaxy S7 and S7 edge both support fast wireless charging.
Before trying Galaxy S7 fast wireless charging to charge Galaxy S7 battery, you may want to know:
- There are no widely-accepted industrial standards for fast wireless charging. If possible, you should try to get a Samsung branded fast wireless charger.
- Galaxy S7 fast charging requires a fast (adaptive) charger. You cannot use normal wall charger for the charging pad, although a normal wall charger with 2A current output may seem powerful enough.
- Some vendors may not include power adapter (wall charger) in the box. You need check the contents carefully.
- The power efficiency of Galaxy S7 fast wireless charging is not as high as using normal wireless charging.
- The fast wireless charging time for Galaxy S7 battery is close to normal wall charger with 1.5-2A current output.
- Fast wireless charging pad is normally more expensive and bulkier than normal wireless charging pad.
- You should not block the vents near the bottom of fast wireless charging pad.
- If you are using bulky case for Galaxy S7 or S7 edge, wireless charging and fast wireless charging may not work. In some cases, the charging can be very slow.
How to charge Galaxy S7 battery properly?
Bad charging habits may be harmful for Galaxy S7 battery.
You may try these thumb of rules when you charge Galaxy S7 battery:
- Charge Galaxy S7 battery only when you need to do so. It is not necessary to top up Galaxy S7 battery. Some misleading articles may tell you to top up to 75% to expand lifespan of battery. This is wrong. The wear and tear during such top-up procedure may cause more damages. So, you should plan well: can the battery last till you can reach the charger again.
- Don’t drain Galaxy S7 battery completely. This may cause damages to both the battery and other components in your Galaxy S7 or Galaxy S7 edge.
- Once Galaxy S7 is fully charged, disconnect Galaxy S7 from the wall charger if it is convenient to do so. Leaving Galaxy S7 on the wall charger overnight does not make Galaxy S7 battery last longer, although there are no evidences that this may cause damage to the battery. But in most regions, the voltage is not stable in the night and the surges may cause damage to the charger or Galaxy S7. But do not overreact: it is not necessary to get up at 3AM to unplug the charger.
- Don’t disconnect Galaxy S7 from the charger before it is fully charged.
- Your productivity is far more important than “battery life”. The return on investment (ROI) for Galaxy S7 is mainly determined by your usage (and productivity improvement). It is not necessary to sacrifice your usage.
- For most Galaxy S7 owners who charge Galaxy S7 battery less than once a day, you may consider to replace the battery after 18-24 months if you plan to use the phone for 3-4 years. For heavy users, you may have to replace the battery after 12-18 months.
Anyway, it is not necessary to spend too much time to read some useless or wrong tips to save battery. Enjoy the phone!
Should you charge Galaxy S7 battery for 8 hours before using the phone first time?
No, it is not necessary to charge Galaxy S7 battery for 8 hours before using the phone.
In some regions, Samsung does not offer 1-1 exchange. You have to test the phone on the spot. If you find any problems after leaving the shop, you may have to visit service center.
The battery in new Galaxy S7 or S7 edge is always pre-charged to about 50% for you to test.
Of course, if you want to leave the new phone on the charger for 8 hours, it does not harm either.
Will fast charging and fast wireless charging shorten Galaxy S7 battery life?
Fast charging and fast wireless charging will charge Galaxy S7 battery with higher power. This usually generates more heat.
But fast charging and fast wireless charging have been widely tested. It may only have marginal, if any, impact on Galaxy S7 battery life.
You need consider the benefits you get. Your 1-hour time (even for playing a game) is more precious than 0.00001 hour battery life span.
Can I used my old charger to charge Galaxy S7 battery?
Technically, you can use any chargers with 5V voltage and up to 2.1A current output to charge Galaxy S7 battery.
Galaxy S7 and Galaxy S7 also use micro USB cable. So, you can readily use most old chargers.
But please remember wall chargers also age with time. And some poor quality charger may not be able to produce stable output. It is not necessary to try your luck for a $700 phone with a very old charger or poor-quality charger.
How to disable fast charging and fast wireless charging on Galaxy S7 and Galaxy S7 edge?
For whatever reasons, Samsung allows you to disable fast charging and fast wireless charging on Galaxy S7 and Galaxy S7 edge.
Personally, I would not recommend you to disable fast charging or fast wireless charging in Galaxy S7 otr S7 edge because fast charging should not have noticeable damage to Galaxy S7 battery.
Anyway, if you still think Galaxy S7 fast charging, or fast wireless charging may harm the battery, you can disable them in Settings– battery as shown below.
Do you know how to charge Galaxy S7 battery correctly? Do you have any questions on using wall charger, fast charger, wireless charger and fast wireless charger to charge Galaxy S7 battery?
If you have any questions on charging Galaxy S7 battery or using different chargers for Galaxy S7 or S7 edge, please leave your questions in the comment box below.
The community will try to help you.
For other guides on using Galaxy S7 and Galaxy S7 edge, please check Galaxy S7 online manual page.
For detailed Galaxy S7 how-t0 guides, please check Galaxy S7 how-to guides page.