November 5, 2015 at 14:56Powerbank: fast charge or high capacity?
Greetings GT reader.
This morning it happened to me that when I got up in the morning I realized that I should go out in 15 minutes, the phone is charged at 5%, and the powerbank is empty.
Everyone who is familiar with this situation, welcome to cat.
At this moment I asked myself: why do I need all this capacity (10000mach) if it is useless? Of course, the reader can rightly notice that if I did not forget to charge the powerbank, then there would be no problem, but if I did not forget to charge, I would not need a powerbank either. My memory has good selectivity and does not remember what it considers not important. Charging your phone / powerbank is just one of the unimportant ones. I realized that for me the most important consumer attribute is the charge speed, and the capacity is a secondary factor (it is clear that there is a lower limit: for example, another capacity of the smartphone’s internal battery). Having monitored the market, I identified 4 powerbank concepts:
1) The simplest and cheapest options
Of the features, a very long charge time can be noted. In most cases, the memory is based on the TP4056 chip , so the charge current does not exceed 1A (charged via micro USB) and the charge time is C hours (battery C-capacity). In 15 minutes it will be able to accumulate 250mAh or 0.925Wh.
2) More capacious and expensive options than in 1
For example . Use the charger from the phone / tablet and provide a charge current of up to 2A. In 15 minutes it will be able to accumulate 500mAh or 1.85Wh.
3) Powerbank with its memory is
usually supplemented by the ability to charge a laptop. The charge power is about 20W. At the same time, it will accumulate 5Wh in 15 minutes, which is 1350mAh in the equivalent of li-ion battery. Well, not bad - half the capacity of the internal battery, but the rest of the mass will have to be idle.
4) Quick-charge powerbank with its own memory.
This segment is still not very developed, there are several projects (you can search on kickstarter). Briefly, the idea can be described as follows: there is an external battery with a capacity of 8.25Wh (2500mAh, 3.3V), which in 15 minutes gains 70-80% of the charge - 6Wh or the equivalent of a li-ion battery 1670mAh. Weight in the region of 120-150 grams. Advantages are there. However, the memory is unique, suitable only for this device and the probability of finding it outside the home is zero.
Now I have a question for you, dear reader, what would you choose a 4 times more capacious battery or one that charges 4 times faster? With comparable cost and dimensions / weight.
This morning it happened to me that when I got up in the morning I realized that I should go out in 15 minutes, the phone is charged at 5%, and the powerbank is empty.
Everyone who is familiar with this situation, welcome to cat.
At this moment I asked myself: why do I need all this capacity (10000mach) if it is useless? Of course, the reader can rightly notice that if I did not forget to charge the powerbank, then there would be no problem, but if I did not forget to charge, I would not need a powerbank either. My memory has good selectivity and does not remember what it considers not important. Charging your phone / powerbank is just one of the unimportant ones. I realized that for me the most important consumer attribute is the charge speed, and the capacity is a secondary factor (it is clear that there is a lower limit: for example, another capacity of the smartphone’s internal battery). Having monitored the market, I identified 4 powerbank concepts:
1) The simplest and cheapest options
Of the features, a very long charge time can be noted. In most cases, the memory is based on the TP4056 chip , so the charge current does not exceed 1A (charged via micro USB) and the charge time is C hours (battery C-capacity). In 15 minutes it will be able to accumulate 250mAh or 0.925Wh.
2) More capacious and expensive options than in 1
For example . Use the charger from the phone / tablet and provide a charge current of up to 2A. In 15 minutes it will be able to accumulate 500mAh or 1.85Wh.
3) Powerbank with its memory is
usually supplemented by the ability to charge a laptop. The charge power is about 20W. At the same time, it will accumulate 5Wh in 15 minutes, which is 1350mAh in the equivalent of li-ion battery. Well, not bad - half the capacity of the internal battery, but the rest of the mass will have to be idle.
4) Quick-charge powerbank with its own memory.
This segment is still not very developed, there are several projects (you can search on kickstarter). Briefly, the idea can be described as follows: there is an external battery with a capacity of 8.25Wh (2500mAh, 3.3V), which in 15 minutes gains 70-80% of the charge - 6Wh or the equivalent of a li-ion battery 1670mAh. Weight in the region of 120-150 grams. Advantages are there. However, the memory is unique, suitable only for this device and the probability of finding it outside the home is zero.
Now I have a question for you, dear reader, what would you choose a 4 times more capacious battery or one that charges 4 times faster? With comparable cost and dimensions / weight.
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What is important for you in powerbank for a smartphone?
- 43.6% capacity - to charge 408 less often
- 9.1% Charge speed - to have time to recharge 86
- 28.4% I do not use powerbank 266
- 18.7% I hope that a new type of battery will appear soon and the problem will disappear. 175