₦airaland Forum

atheistandproud:
I'll go with Oraimo sha

Just make sure you're getting an original.

Same here. I enjoyed using the Oraimo 10,000 mAh power bank

Hundjager:
This is quite insightful, thanks for sharing OP, which would you suggest I purchase between New Age and Oraimo?

oraimo

yes it charges our phones full, i didnt say after doing that it will still have power in it

atheistandproud:
No Battery remains at the same capacity after a year's worth of use. It must depreciate.

atheistandproud:
A Powerbank is a portable battery backup device that is designed to supply electrical power to charge small electrical devices. These include smartphones, wireless Bluetooth speakers, LED lights etc. There are Powerbanks that are even capable of charging laptops these days.

There are so many misconceptions and myths about powerbanks that this author can spend a whole day debunking. But we do not have all day.

How do powerbanks work?

A powerbank is essentially a battery with a circuit board that is designed to charge other devices. Every good powerbank should have a circuit board with a chip that can intelligently monitor the battery, ensure safe charging and modify or cut off power supply if need be.

Every powerbank that uses wired charging conforms to the USB 5V standard. The batteries inside a powerbank have a standard voltage of 3.7V. When a device is plugged to a powerbank, the current is stepped up from 3.7V to 4.2V - 5V. This stepped up current is then delivered to the device being charged.

Powerbank capacity

Due to this conversion of battery voltage from 3.7V to 5V, a good amount of electrical power is lost, mostly as heat. As a result, powerbanks cannot deliver their full advertised capacity. Powerbank manufacturers advertise the capacity of their batteries when it is stored at 3.7V. When checking a powerbank’s capacity, it could be written as 30,000mAh at 3.7V or 18,000mAh at 5V.

When 3.7V is converted to between 4.2 – 5V, the amount of current that the powerbank can deliver falls drastically. There is a very simple formula to convert this.

Actual capacity = Advertised capacity (mAh) x 3.7V x 0.8 ÷ 4.2V

For a 20,000mAh
Actual capacity = 20,000 x 3.7 x 0.8 ÷ 4.2V
Actual capacity = 59200 ÷ 4.2
Actual capacity = 14,000mAh approx.

If you cannot remember this formula, then always remember this. A powerbank can only deliver approximately two-thirds (2/3) of the advertised capacity. This means that a 5,000mAh would deliver approximately (5,000 x 2/3=) 3,400mAh. A 10,000mAh would give approximately (10,000 x 2/3 =) 6,700mAh. A 30,000mAh can give out 20,000mAh approximately.

How much charge can a powerbank actually give

Now that we have seen how powerbank capacity is being calculated, how much charge a powerbank gives out, especially to a phone is not an exact science. If a phone is used while being charged, work done could be equal to zero. If the phone was left alone or even switched off, then the powerbank would accurately charge its battery properly. The age of the powerbank and its charge capacity is also another factor to look at. Powerbanks tend to lose capacity as they age. A 2 year old, 20,000mAh powerbank may only have 10,000mAh left.


Do powerbanks destroy phone batteries?

Yes and no. A good powerbank has no negative effect on your battery. It should come with a good circuit board to ensure safe and quality charging. A bad powerbank on the other hand would destroy your battery. This is why it is important to buy powerbanks from reputable brands instead of cheap generic brands from roadside vendors.


How to choose a good powerbank

The first step is to always do research. A lot of people are too lazy these days to do research. Read reviews and learn to distinguish between real and paid reviews. Manufacturer’s brand name and reputation matter a lot here as well. Names like Anker, Aukey, Romoss, Xiaomi etc. should come to mind.


Check the powerbank’s specs (input, output, capacity etc.) as well. If a spec looks too good to be true, it probably is. Someone once showed me a 100,000mAh powerbank. I laughed it off and said it was a scam. The bigger the capacity, the heavier the powerbank. Always do your research before splashing your cash.

https://inquisitiveuniverse.com/2021/05/12/powerbanks/

Very insightful.

atheistandproud:
https://inquisitiveuniverse.com/2021/05/12/powerbanks/

Good afternoon sir.
I read and understand your write up. My question is between a Floveme 20kmAh power bank and Itel Powerbank. Which one do u suggest. This is my first time buying power bank

isgombe:
Good afternoon sir.
I read and understand your write up. My question is between a Floveme 20kmAh power bank and Itel Powerbank. Which one do u suggest. This is my first time buying power bank

I have never used a Floveme powerbank before so I can't say. I have a Floveme charger which I got since 2019 and it still serves it's purpose.

The reviews on the Itel are good. If you no like Itel, buy Floveme use and give review.

So informative thanks

Abeg how good is the itel power bank ??
I currently owns one make e no spoil my battery!!!

Hardey33:
So informative thanks

Abeg how good is the itel power bank ??
I currently owns one make e no spoil my battery!!!

To be honest, I've never used one before so I cannot say. But so far, the reviews have been good. Since you've already bought the Powerbank so...

Hardey33:
So informative thanks

Abeg how good is the itel power bank ??
I currently owns one make e no spoil my battery!!!

Was it worth the buy?

Thank you for always enlightening us.