Power Banks/Mobile Chargers – How Much mAh Do I Need?

Power Banks/Mobile Chargers – How Much mAh Do I Need?



Frequently, customers will ask us: “what an earth is mAh?!” or “how much mAh do I need for my power bank?!”. We understand that mAh will be a new word for many of you, so we’ve written this blog post to offer some much needed explanation.

mAh, is the abbreviation of ‘milliamp hour’, and represents the battery capacity of the power banks – simple! The higher the mAh, the longer the power bank will last. You’ll also find that mAh correlates heavily with price – the lower the mAh, the lower the price, and vice versa. Standard promotional power banks range approximately between 1,000mAh to 10,000 mAh. The big question is how much mAh do you need? 

4 ways to help determine how much mAh you need:

1. Find out the mAh values of the devices you want your power bank to charge (the table below provides this information on some of today’s most common devices).

2. Using your findings in point 1, factor in how many charging cycles you want your power bank to supply. For example, if your power bank has a mAh value of 9,000, and the device you need charging has a mAh capacity of 1,000, you’ll have a total of nine charging cycles.

3. Think about the target users. How much are you willing to spend on them? How much mAh would they need?  

4. Think about the purpose of this sell/exchange/giveaway, to determine what price and size is needed to do the job.

Table of common devices and their mAh values, followed by power banks that would be most suitable.

Device mAh Power Bank Suggestion
Huawei Mate 20 Pro 4200 Kracken 5000mah Powerbank
Samsung Galaxy S10 Plus 4100 Vormell Powerbank 5000 mAh
Samsung Galaxy Note 9 4000  Smart Power Card Plus 400mAh
Samsung Galaxy S9 Plus 3500  
Huawei P20 Pro 4000 Stone Power Bank (4000mAh)
iPhone XS 2658  Smart Power Card 2400 mAh
iPhone XS Max 3174  
Samsung Galaxy S9 3000  
Google Pixel 3 XL 3430  
iPhone X 2716  
OnePlus 6T 3700  
Honor View 20 4000 Tokyo Powerbanks 4000 mAh
LG G7 ThinQ 3000  
iPhone XR 2942  
Samsung Galaxy Note 8 3300  
Google Pixel 3 2915  
iPad Pro 11 7812 Solar Powerbanks 800mAh
Samsung Galaxy Tab S4 7300 Titan Powerbanks 8000 mAh
iPad mini 4 5124  
Samsung Galaxy Tab S3 6800  
Asus ZenPad 3S 10 5900  
iPad (2017) 8827 Kingdom Powerbanks 10,000 mah

(Ever wonder why some chargers never seem to charge your device to 100% – it’s likely because your power bank has a lower mAh than your device)

Charging rates

It’s easy to assume that the higher the mAh, the faster it will charge your device. That’s in fact completely incorrect. The charging rate is entirely dependent on the amp value “A” of your power bank; for example:

Tower Powerbanks –  2,200 mAh battery and a Output Voltage / Current: DC 5V, 1.0

Black Aluminium Powerbank – 5,000 mAh battery and a Output Voltage / Current: DC 5V, 1.5 A

Kormat Powerbanks – 4,000 mAh battery and a Output Voltage / Current: DC 5V, 3.0 A

Kingdom Powerbanks – 10,000 mAh battery and a Output Voltage / Current: DC 5V, 1.0 A

In this example, the Kormat powerbank will charge three times as fast as the Tower and Kingdom powerbank and is double the speed of the Black Aluminium powerbank. Moreover, even though the Kingdom has an 10,000 mAh capacity; its output rate is only 1.0 A, which means the Kormat will still charge your device faster even though it has less capacity.  The higher the amp value, the faster the charge rate. Note: there are chargers which have a lower amp value than 1, it will present itself as 0.8A or 800mA. mA stands for milliamps (1000 milliamps to 1 amp).

Popular Power Banks

Power Banks (or portable mobile chargers) are one of the best-selling promotional merchandise gifts due to our reliance of our many gadgets! With an abundance of styles, branding options and price ranges  – you really can’t go wrong. Below is a selection of the market’s top power banks.


Contact our friendly team on 01420 478866 or email us at info@completemerchandise.co.uk.