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Calculations with current and capacity
You can calculate the number of times you can charge a phone by dividing the capacity of your
powerbank by the capacity of your phone. An iPhone 5 (1440mAh) can be charged (withut the sun)
around 8000/1440 = 5,5 times*
* "Festival": 4000 / 1440 = ~3 charges
The charging time can be calculated if you know the capacity of your phone and the maximum
current intake. Newer models can take up to 2A, but most are limited to 1A(mpère). This means
that a phone with 2000 mAh capacity (standard battery) needs two hours to charge using the Solar
Powerbank at a temperature of 20 degrees Celcius
The calculations are:
CHARGING TIME (HOURS) = CAPACITY PHONE BATTERY
NUMBER OF CHARGES
We have calculated this for some of the most popular phones:
Device
iPhone 5
Samsung S6
iPhone 6
Samsung S7
iPad
Samsung Tablet
* With 8000 mAh Powerbank
= CAPACITY POWERBANK (8000)
mAh
Charging time
1440 mAh
1,4 hours
2550 mAh
2,5 hours
1810 mAh
1,8 hours
3000 mAh
3 hours
11560 mAh
12 hours(1A) / 6 hours(2A)
7000 mAh
7 hours (1A) / 3,5 hours (2A)
/ 1000 (when calculating in mAh)
/ CAPACITY PHONE BATTERY
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Number of charges*
5,56 x
3,14 x
4,42 x
2,67 x
0,69 x
1,14 x
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