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Comparison Proda Power Box PPL-14 vs Proda Power Box PPL-12

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Proda Power Box PPL-14
Proda Power Box PPL-12
Proda Power Box PPL-14Proda Power Box PPL-12
from $50.88
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from $24.53
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Main
Capacity 30000 mAh. Info display. Flashlight.
Simultaneous charging of two devices. Large capacity. Display to show the remaining charge. Built-in flashlight.
Battery capacity30000 mAh20000 mAh
Real capacity18900 mAh12600 mAh
Battery typeLi-PolLi-Pol
Charging gadgets (outputs)
USB-A22
Power bank charging
Power bank charging inputs
microUSB
microUSB
Power bank charge current via USB
1 А /5V/
1 А /5V/
Features
Bundled cables (adapters)
microUSB
microUSB
Features
info display
flashlight
info display
flashlight
General
Body materialplasticplastic
Dimensions161x61x23 mm
Color
Added to E-Catalogmarch 2015september 2014

Battery capacity

The higher the battery capacity, the more energy the power bank is able to accumulate and then transfer when charging to gadgets connected to it. But it should be borne in mind that not all of the accumulated energy goes specifically to charging – part of it is spent on service functions and inevitable losses in the process of transmission. So in the specifications, the real capacity of the power bank is also often specified. If there is no data on real capacity, then when calculating it is worth proceeding from the fact that it is usually somewhere 1.6 times lower than the nominal one. For example, for a model with a nominal capacity of 10,000 mAh, the actual value will be approximately 6300 mAh.

As for the specific values of the nominal capacity, then in models with the lowest performance it is 5000 – 7000 mAh and even less ; such power banks are suitable as a backup source of energy for 1 – 2 smartphone charging with a not very capacious battery or other similar gadget. The 10,000 mAh solutions are the most popular nowadays – in many cases, this option provides the best price-capacity ratio. The 20,000 mAh and 30,000 mAh options are also very common. But even a capacity of 40,000 mAh or more, thanks to the development of modern...technology, is quite common.

Real capacity

The real capacity of the power bank.

Real capacity is the amount of energy that a power bank is able to transfer to rechargeable gadgets. This amount is inevitably lower than the nominal capacity (see above) — most often by about 1.6 times (due to the fact that part of the energy goes to additional features and transmission losses). However, it is by real capacity that it is easiest to evaluate the actual capabilities of an external battery: for example, if this figure is 6500 mAh, this model is guaranteed to be enough for two full charges of a smartphone with a 3000 mAh battery and smartwatches for 250 mAh.

The capacity in this case is indicated for 5 V — the standard USB charging voltage. At the same time, the features of milliamp-hours as a unit of capacity are such that the actual amount of energy in the battery depends not only on the number of mAh, but also on the operating voltage. In fact, this means that when using fast charging technologies (see below) that involve increased voltage, the actual value of the actual capacity will differ from the claimed one (it will be lower). There are formulas and methods for calculating this value, they can be found in special sources.
Proda Power Box PPL-14 often compared
Proda Power Box PPL-12 often compared