An exter­nal bat­tery for a smart­phone or any oth­er device is a very use­ful and always need­ed item. At any moment, we can find our­selves in a sit­u­a­tion where we urgent­ly need to recharge our devices, but there may not be an out­let at hand. It is in such cas­es that an exter­nal bat­tery or pow­er bank comes to the res­cue. The main char­ac­ter­is­tic by which a pow­er bank is cho­sen is capac­i­ty.

We decid­ed to talk about how to choose the right device accord­ing to its char­ac­ter­is­tics.

Pow­er banks range in size from pock­et-size to quite large ones that can add up to a kilo to your bag. You can charge com­plete­ly dif­fer­ent devices with their help — not only smart­phones, but also tablets, action cam­eras, speak­ers, cam­eras, and in some cas­es even lap­tops.

External battery capacity

In order to choose the right capac­i­ty, you need to make some sim­ple cal­cu­la­tions. First of all, you need to know exact­ly the mod­el of the device or devices that you plan to charge most often. Know­ing the mod­el, you can eas­i­ly see the bat­tery capac­i­ty of the device in its char­ac­ter­is­tics. After that, you need to at least rough­ly cal­cu­late how many times you will need a charg­er on aver­age. Some sim­ple math will tell you what bat­tery capac­i­ty you need to look for.

For exam­ple, iPhone smart­phones have very small bat­ter­ies — the iPhone X mod­el has a 2716 mAh bat­tery. The Sam­sung Galaxy S9 Plus has a high­er fig­ure, 3500 mAh. There are var­i­ous smart­phones with a capac­i­ty of 4000mAh, 5 and above.

In the case of the two flag­ship mod­els, every­thing is quite sim­ple, you can choose a bat­tery with an aver­age capac­i­ty of 10,000 mAh to charge them. They are small and will be able to charge the device sev­er­al times, which is enough for most users.

Various types of power banks

Con­trary to pop­u­lar belief, exter­nal bat­ter­ies are by no means lim­it­ed to the only type of box with USB out­puts famil­iar to us. More­over, sev­er­al types can be dis­tin­guished among them. One of the most con­ve­nient for a smart­phone is a charg­ing case. If you are not wor­ried about the appear­ance of your device, then this is the per­fect choice. Such cov­ers, of course, make the smart­phone a lit­tle heav­ier and larg­er, but it can also work longer than usu­al.

There are also spe­cial exter­nal bat­ter­ies for lap­tops or com­bined for mobile devices and lap­tops. They dif­fer in capac­i­ty and size.

And of course, the most famil­iar option for us is a portable charg­er that works with mobile devices.

How much does the power bank itself charge?

Of course, this depends pri­mar­i­ly on the capac­i­ty of the device. How­ev­er, you should imme­di­ate­ly warn that such devices sup­port fast charg­ing for smart­phones, but they them­selves use the stan­dard long charg­ing process. A device with a capac­i­ty of 2000mAh will charge quick­ly, like a smart­phone, but a 20000mAh bat­tery can be charged for half a day. It is best to charge the bat­ter­ies from the net­work, and not from the com­put­er’s USB port, so the process will be faster and, as a result, more effi­cient.

Exter­nal bat­ter­ies run on lithi­um poly­mer (Li-Po) and lithi­um-ion (Li-Ion) bat­ter­ies.

Depend­ing on the specifics of the device and the chem­i­cal nuances in the design of the bat­tery, a pow­er bank can with­stand from 200 to 1000 recharge cycles.

What is the best way to charge a smartphone and not waste the charge of a power bank?

Many peo­ple ask this ques­tion and quite right­ly, because the ener­gy of your portable bat­tery is also not infi­nite. Smart­phones tend to down­load apps while charg­ing and gen­er­al­ly run the same process­es as they do the rest of the time, which caus­es them to absorb more pow­er while charg­ing. In order to avoid this, and at the same time reduce the time it takes to restore the smartphone’s bat­tery, it is rec­om­mend­ed to put the device on air­plane mode.

To save mon­ey, it is not rec­om­mend­ed to charge a smart­phone if its bat­tery is 80 per­cent or more charged.

External batteries from Xiaomi

Xiao­mi makes a lot of dif­fer­ent devices, and since each of them requires charg­ing, the Chi­nese com­pa­ny has tak­en care of exter­nal bat­ter­ies as well. The Mi Pow­er Bank series of devices is dis­tin­guished not only by a large num­ber of pos­i­tive reviews from fans. Mi Pow­er Bank is a very durable and durable device that allows you to eas­i­ly man­age any task. Among oth­er things, with Mi Pow­er Bank, a wide selec­tion of acces­sories and cas­es for them appeared on the mar­ket.

Mi Pow­er Bank is avail­able in var­i­ous capac­i­ties and col­ors. You can pick up options from 5000mAh to 10000mAh and 20000mAh. The sim­plest 5000mAh bat­ter­ies are light, easy to han­dle and very con­ve­nient. 10000mAh will be slight­ly heav­ier in weight and the heav­i­est bat­tery is the most pow­er­ful.

It should be not­ed that on all Mi Pow­er Bank devices, 2 USB ports are avail­able for the user. At the same time, they are charged via microUSB from the net­work or from a com­put­er. When choos­ing, it is best to pay atten­tion to the Mi Pow­er Bank 2 or Pro series. Xiao­mi pow­er banks are avail­able in white, black, grey, dark gray and pink.

Mi Pow­er Bank 5000 mAh is 156g, thin anodized alu­minum body and sim­ple styl­ish design. The charge lev­el of the device is dis­played using LEDs. The bat­tery itself charges in 3.5 hours. The capac­i­ty is enough for one or two recharges of any flag­ship smart­phone.

Mi Pow­er Bank 2 10000mAh is a styl­ish and com­pact pow­er bank. It has an alu­minum body and round­ed edges to help pre­vent scratch­es and dam­age while the device is in a bag. The device sup­ports the fast charg­ing func­tion of smart­phones. It weighs only 228g, and the thick­ness is 14.1mm.

For the most demand­ing, Xiao­mi Mi Pow­er Bank 2c 20000mAh is suit­able. This is a rather heavy device, the weight of which is 358g. It sup­ports simul­ta­ne­ous charg­ing of two devices and has 2 USB out­puts. The body is made of poly­car­bon­ate in order not to weigh down the device. At the same time, the mate­r­i­al is very durable and the device real­ly copes per­fect­ly with all require­ments.


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