peawizzy:
HOW MANY HOURS APPROXIMATELY?

6am - 4pm.

Mr Rassco needs one and is based in ibadan

Rassco:
Mr Rassco needs one and is based in ibadan

Hi Mr Rassco .

We can send to Ibadan. Sending cost to Ibadan is #500 sir.

Oga boss, if this is ur brand...it is manufactured here in naija? (In term of quality)

Goodjayrecords:
Oga boss, if this is ur brand...it is manufactured here in naija? (In term of quality)

I hate to use that word sir. "Nigerian standard". Our brand is world quality.

micynute94:


My Experience with Mayorall PB.

I bought my Mayor source power bank on the 17th of October, 2014 from a local distributor of Mayorall Goods Enterprise at Ahmmadiyya, Abule-Egba, Lagos for 3500.

The power bank was at 57% charge when i bought it.
I expected a full charge of the power bank to charge my phone with a 1400mah battery for 6.86 times using a general mostly used calculation that a power bank with a capacity of 12000mah will output 12000 x 0.8 = 9600mah. Now dividing the capacity by 1400, i should have approximately 6.86 times charging from 0% to 100%. So at 57%, i quite expected the Powerbank to give me (57/100 x 9600)/1400 = 3.908 approx. 3.91times.

On usuage, the Powerbank charged my phone from 75% to 100% once and two complete charge from 0% to 100% totalling a 2.25 charge times which wasn't what i had in mind. # Anomaly 1

Charging the powerbank using a new original tecno charger with an output charger of 600ma, it took approx. 10 hours (from 09:54am to 07:50ish pm) from 0% to 64%.
On average that means it takes roughly 12mins 08 sec per percent charge. This wasn't in accordance to the 8 - 9 hours charge i expected. # Anomaly 2

I also discovered that the powerbank discharges randomly while still connected to a power source before it continues charging again. This happened about five times. # Anomaly 3

When using the powerbank, i also discovered that the rate at which it discharge doesn't follow a trend i.e it might take 15% to give a 30% boost to my battery, then takes around 27% for 80% boost. # Anomaly 4

I noted all these anomalies and since this was my first time of using a powerbank, i googled some questions lurking in my mind. Also, i made this anomalies known to Mayor and his response was fast, tactful and very helpful.

I was told my mayorall to use a charger with an output of 1.5A rather than the 600ma am using to get a faster charge time. I was also told i should have fully charged the Powerbank before usage( apologizing for the mistake of telling me to use it first before charging; i think it skipped his mind)

Mayor told me i could get a replacement which i told him i prefer. Since i bought it on friday, he told me about the three days return package. I told him i couldn't make it within those days and told him i will only be chanced and free on Thursday, we both agreed on thursday which was last week.

I had a replacement from the distributor i bought the PB from on thursday and everything went well and swiftly.


Due to my noted anomalies of the PowerBank and curiosity, i did some search on lithium ion, charge rate of a PB and a mobile charger, PB capacity, power and some other searches and found out some information i'd like to share as it explained why i had anomalies #1 and #2.

Using a powerbank with a capacity of 12000mah, the internal battery of the PB is usually at 3.7v. That means the total charge of the PB = 12000mah x 3.7v = 44400mWh (44.4Wh).

When the PB is used to charge products such as a smartphone for example, the output voltage is 5V, thus the total eletric charge is 44400/5V = 8880mah.

Two types of conversion occurs during a charging process using a PB.
First conversion occurs when the PB internal circuit converts the internal voltage of 3.7V to 5V, consuming some power in the process and reduces its efficiency..
Second conversion occurs when the phone internal circuits converts the 5V back to 3.7V, this consume some power and further reduces the efficiency to around 80%.

So based on the total charge of the PB which is 8880mah and the fact that efficiency isn't 100%.
We have 8880 x 0.8 = 7104mah. This is exactly the capacity of the PB after all these conversions, power consumption and heat loss.

Since i use a 1400mah battery, total time charge = 7104/1400 = 5.074 times.
So a complete charge of my phone will take 100/5.074 = 19.708% from the PB.

Also a charger with an output of lets say 500mA wont give out all the 500mA, due to heat loss and efficiency not 100% , the charger gives roughly 500 - 22% (+/- 3%) = 400mA - 375mA.

So to charge a PB that requires it's advisable to use roughly 1.2A to 1.5A so that after the heat loss, we still have rougly 1A .

Also the belief that a charger with an higher output known as rapid charger or fast charger will only charge a device to some extent. New devices uses a protection inbuilt circuit that limits the current entering the device.

Most battery, phone, and other gadgets manufacturers include a protection circuit to protect the battery and make it durable. Mayor Source battery make use of this protection circuits according to my tests.(Assumption).

For example, a charger with 700mA will charge a little bit faster than a charger with an output of 400mA if the device input current max is 1A or higher. But a 2A output charger will take the same time as a 1.8A or 1.5A output charger as the device can only collect a max of 1A.

With all these info, i charged my PB from 91% to 100% from 8am to around 09:30am and trickle charge it till 11:30am using a 2A charger.
I used it to charge my PB once and it went from 100% to 81% i.e. 19% for a complete charge which was in accordance with my estimates i mentioned.

The PB is working well and charges fast and i have been using my phone since 7:30am today after charging it with my PB ( The charge on my phone tend to last longer when using it than using a generator)

N.B : Sorry for the long write up. my hand sef don dey pain me as i dey use a phone type this.
P.S; Tired to starting proof reading and editing any grammatical error in the write up, so endure

for real, dz z d actual capacity of d pb...thanks for the clarification... u know I expected so much more from d device and I was kinda frustrated when it performed below my expectation until I read ur review... now m a happy man. I use tecno l3. it has 2400mah ba3 capacity. before now, I hoped it would charge my device at least 4times even more I.e 12000/2400=5 but I was depressed when it hardly gave me 3times charge. I had questions that needed answers, not even mayorall could gv... he only promised to make a replacement if need b. Considering this detailed review, not even a replacement will fair better. there z a board in my school that reads "questions and not answers bring knowledge " but v come to realise that questions without answers bring frustration. Thank u for this exposure.

Martiyu:


for real, dz z d actual capacity of d pb...thanks for the clarification... u know I expected so much more from d device and I was kinda frustrated when it performed below my expectation until I read ur review... now m a happy man. I use tecno l3. it has 2400mah ba3 capacity. before now, I hoped it would charge my device at least 4times even more I.e 12000/2400=5 but I was depressed when it hardly gave me 3times charge. I had questions that needed answers, not even mayorall could gv... he only promised to make a replacement if need b. Considering this detailed review, not even a replacement will fair better. there z a board in my school that reads "questions and not answers bring knowledge " but v come to realise that questions without answers bring frustration. Thank u for this exposure.

Am happy my review did help to clear a lot of unknowns that might cause contempt or frustration.
I felt d same way till i did my searches .. and even that wasn't easy with the fact that a lot of info on PB are wrong and. too generalized .
Am happy my curiosity did help some. guys..

micynute94:


Am happy my review did help to clear a lot of unknowns that might cause contempt or frustration.
I felt d same way till i did my searches .. and even that wasn't easy with the fact that a lot of info on PB are wrong and. too generalized .
Am happy my curiosity did help some. guys..

Thanks for that boss.

I never doubted you. Very nice product I must say. Looking to recommend your product and doing business with your company in the nearest future. All the very best.

Rassco:
I never doubted you. Very nice product I must say. Looking to recommend your product and doing business with your company in the nearest future. All the very best.

Thank you. God bless you for your purchase and review. You business too will move forward.

mayorall:




Thank you. God bless you for your purchase and review. You business too will move forward.

Sorry I may derail your thread but I need your help. I want you to help me pay someone some money via paypal. Will you do it for me?
Please send me a mail at gboliwe2503atgmaildotcom

Check your mail sir Mr Gboliwe .

mayorall:
Check your mail sir Mr Gboliwe .

Nothing there please. Please re-check the address

Gboliwe:

Nothing there please. Please re-check the address

It was sent sir. Check your spam


Email: info@mayorall.com

mayorall:




It was sent sir. Check your spam


Email: info@mayorall.com

Yea, thanks. Replied.

@ micynute, very good job u did there.

@ mayarall, l got my P/bank sometime last month and got a small issue with it and it's that: the digits on the LCD screen is not clear. By this l mean that l can't distinguish between/among the digits all that l see are 9 & 8, no matter the percentage it attains.
l don't know if other users experience this. besides this l think it's a good product. I think the 1st production batch is better than this batch.
l have used it only twice since l bought it a month ago, cos electricity suddenly got stable

REDBULL1:


Bro, How manage? in all honesty my own product isn't living up to expectations. it goes from 100 to 67 Just to charge my tecno L3. Mayorall what do u have to say? I've been meaning to call and complain But I'm always busy n sometimes I forget. Treat this as urgent Cos I'm unhappy with this product

I'll say it's because of the capacity of l3 ba3... 2400mah, others that v been putting in very nice words mostly charge devices that v less than 2000mah so u can imagine how different d experience will b. Well, urs z very very good if it could gv ur phone 100% with 33% of d bank's power... I charged mine from 1%-99% with 38% power of the pb drained I.E it dropped from 100% to 62%. But overall, d device is really saving my face.

Ayostically:
@ micynute, very good job u did there.

@ mayarall, l got my P/bank sometime last month and got a small issue with it and it's that: the digits on the LCD screen is not clear. By this l mean that l can't distinguish between/among the digits all that l see are 9 & 8, no matter the percentage it attains.
l don't know if other users experience this. besides this l think it's a good product. I think the 1st production batch is better than this batch.
l have used it only twice since l bought it a month ago, cos electricity suddenly got stable

It fell sir. more than thrice. kindly check the body for wears and signs of fall.

Martiyu:


I'll say it's because of the capacity of l3 ba3... 2400mah, others that v been putting in very nice words mostly charge devices that v less than 2000mah so u can imagine how different d experience will b. Well, urs z very very good if it could gv ur phone 100% with 33% of d bank's power... I charged mine from 1%-99% with 38% power of the pb drained I.E it dropped from 100% to 62%. But overall, d device is really saving my face.

L3 has high efficiency just like samsung galaxy S4. But I get complete 4 full charge. S4 is 2600mah. Either I off my phone, or stop using, or I stopped the data connection. I have done this with more than 10pieces across 3 batches produced to ensure quality. Also just tested a customer goods tonight. I have 26% left from 46%. Started at 11% though. The battery might be higher than the advertised capacity by tech company to nurse their ego. Also we have mayor T1 coming. We removed LCD as it consumes much energy of the powerbank. we added a piece of battery. Very slim design

mayorall:



L3 has high efficiency just like samsung galaxy S4. But I get complete 4 full charge. S4 is 2600mah. Either I off my phone, or stop using, or I stopped the data connection. I have done this with more than 10pieces across 3 batches produced to ensure quality. Also just tested a customer goods tonight. I have 26% left from 46%. Started at 11% though. The battery might be higher than the advertised capacity by tech company to nurse their ego. Also we have mayor T1 coming. We removed LCD as it consumes much energy of the powerbank. we added a piece of battery. Very slim design

If this is true, what then can u say of my pb that hardly charges my l3 of 2400mah thrice. Z dr anything m missing?

At Matiyu . Many things about your phone battery I won't be able to say here. Many things your phone producer won't tell you about your battery. The only thing you are not doing right is your charger. The pb input is 1A minimum. your charger is 0.7A. Therefore, your pb % will be jumping with %. like 80%-70%, 55%-40%.

mayorall:




Imo transport do charge just #1,000..


Power bank #3500

Sending to Owerri. #1,000

Total : 4,500


We use corporate account so no fear. Thank you

what's the shipping price to Akure ?

mayorall:



It fell sir. more than thrice. kindly check the body for wears and signs of fall.

fall? you mean while on transit to your office? but it seemed intact, no scratches, not even on the packet

Abimloaded:


what's the shipping price to Akure ?

Hi Abimloaded,


It will cost #1,000 to Akure, 4hours delivery.

Ayosticaly:


fall? you mean while on transit to your office? but it seemed intact, no scratches, not even on the packet

Yours sir.

mayorall:


Hi Abimloaded,


It will cost #1,000 to Akure, 4hours delivery.

OK. I will need to order for yours because the one I bought last week is not performing up to my expectations.

CAMICO POWER BANK 5600mAh.

it takes upto 5 hours before it get charged fully and it charges my TECNO S3 just once and that's all.

How much to get this powerbank in yenagoa?

Abimloaded:


OK. I will need to order for yours because the one I bought last week is not performing up to my expectations.

CAMICO POWER BANK 5600mAh.

it takes upto 5 hours before it get charged fully and it charges my TECNO S3 just once and that's all.

Ese egbon mi. ELeyi ma charge phone yin more than four times. It's a promise sir. I will gladly refund you if it didnt, also if it's above 4times, you will give us more customers

waleski:
How much to get this powerbank in yenagoa?

Hi Waleski ,

sending cost to Yenagoa via post office is #650. Via bus is #1500 sir.

mayorall:




Ese egbon mi. ELeyi ma charge phone yin more than four times. It's a promise sir. I will gladly refund you if it didnt, also if it's above 4times, you will give us more customers

Loool. no problems. Next week