solar energy storage lifepo4 battery 24v 200ah.Which is better between polymer power banks and lithium battery power banks?

　　1. My phone's battery is low, and I often miss many calls due to running out of power.

　　What you need is a 4400mAh~6600mAh power bank. The larger the capacity of the power bank, the heavier it becomes, making it not very convenient to carry. The larger the capacity of the power bank, the longer it takes to fully charge. A 10000mAh power bank takes about 12 hours to fully charge. Do you have the time to fully charge it? If you don't have the time to fill it up, what's the difference between buying a smaller one?

　　2. I often play on the phone and often run out of electricity.

　　You need a power bank with a capacity of 10000mAh to 12800mAh.

　　Why don't you recommend me to buy such a large one, as there are products selling 20000mAh online? Um... how long do you plan to spend filling it up? 24 hours? Can you charge your phone 24 hours without using a power bank?

　　2、 My phone battery is 3000mAh. If I buy a 10000mAh power bank, I can charge it three times, right?

　　Most power banks contain lithium batteries, and when the battery power is transferred from lithium batteries to our mobile phone batteries, there is a conversion rate of approximately 70%.

　　That is to say, a 10000mAh power bank can generate 7000mAh of electricity. If your phone battery is 3000mAh, it should be able to be charged twice.

　　3、 I heard there is a fake power bank, what's the matter?

　　Virtual labeling refers to labeling a number higher than the actual capacity to deceive consumers.

　　For example, a 4400mAh power bank is labeled as 6600mAh. In your actual use, you may feel that the difference is not significant. 70% of 4400 is 30806600, and 70% is 4620, which is less than the capacity of a single battery by 1540. And when you usually use it, you often plug in the power bank to play, and while playing, you are still consuming the power of the power bank, so the seller just needs to explain a little to deceive you.

　　How to distinguish? Fully charge the power bank and calculate how many batteries can be charged at a conversion rate of 70%. Do not play with your phone while charging, it is best to turn it off at night to charge. This way, you can know if it's a false label.

Read recommendations:

18650 4800MAH 3.7V

What are the advantages of industrial lithium batteries

What is the working principle of lithium batteries?

energy storage system lithium battery manufacture

AAA Ni-MH batteries