Best Portable Power Bank to Buy

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so you've left your phone plugged into

the wall all night you wake up with it

fully charged and ready for a full day

of selfies catching pokémon and selfies

of catching pokémon but just a few hours

in you get the dreaded low battery

warning and there's nary an outlet in

sight this is where portable battery

banks can save the day you just whip it

out of your pocket and bam no solar

panel or flashbacks to playing with a

scary jack-in-the-box to get the juice

you so desperately need but with all the

options out there how do you know which

one to pick well aside from the usual

reading reviews and checking

manufacturer reputations just as you

would do with a graphics card a webcam

or an extra-large hamster wheel the most

obvious place to start is with the

battery's capacity it's typically

expressed in milliamp hours which

despite the name is actually not a unit

of time so I just must hate us right but

rather a unit that describes the amount

of electrical energy a device can hold

so you can think of a device whose

battery is rated for fewer milliamp

hours like an iPhone has a cup of water

and a battery bank rated for more

milliamp hours as a bucket of water so a

battery pack with a high milliamp hour

rating can hold enough energy that it

can power up your devices

multiple times or powerup devices like

tablets with a higher battery capacity

themselves so consumer grade battery

banks start around 2,000 milliamp hours

and go all the way up to over 9000 these

devices at the higher end of that range

are capable of charging your average

smartphone eight times or even more but

if you've had a few of them you might

have noticed that battery banks with the

same milliamp hour rating can vary quite

a lot in terms of performance so what

gives for one thing not all batteries

discharged at the same rate all the time

this is especially true if you're

charging devices that draw a lot of


such as high-end tablets this lowers the

effective capacity to below what it

would be if you were just charging low

current electronics there's also more to

life than just battery size there are

features to consider in this video here

we compared five rugged battery banks

that advertised everything from built-in

LED flashlights to shock and water

resistance though it should be noted

that some of these claims didn't end up

panning out in the real world and while

we're on that subject there's more to

life than manufacturer's ratings for

capacity to line has published a video

that's me comparing how many times six

different brands of battery banks could

recharge an iPhone se and while most

reputable brands were within fifteen

percent of each other the worst one

tested was less than one third as

effective as some of the others and it

doesn't get easier charging rate going

back to our water analogy is how quickly

you can pour from your bucket to your

cup and is a huge factor for folks who

want to plug in for 20 minutes while

getting ready for that big date and not

have to carry their charger around for

the rest of the night typically battery

banks have either one amp or two amp

outputs both of which are running at the

standard USB 5 volts if you have a

device that can accept two amps of

current as many newer ones can then a 2

amp output on your battery bank will not

only charge your device faster but it

will also keep it running if you need to

use it while it's charging keep in mind

though that chargers labeled as 4.8 amp

or some other high number are usually

referring to total current across all of

the port's which is great if you're

going to be plugging in multiple

power-hungry devices at once if the

regular USB spec isn't enough for you

though there are even some battery banks

that support rapid charging technologies

like Qualcomm quick charge and Samsung

fast charge that can power up your

devices even more quickly by increasing

from 5 volts up to as high as 20 volts

but those require both a device and a

charger that support

now go forth with this knowledge and

find yourself a battery bank that gives

you all the power you've ever wanted

just don't use it to try and invade

Russia in the winter time we all know

how that works out ,

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