Aukey Sprint Ultra
26800 mAh, 65 W, 99.16 Wh
Question about Aukey Sprint Ultra
Very happy to hear about this product for my Macbook Air. Thank you. The newest Macbooks (2018-present) have 4379 mAh, does that mean you can charge them 6 times on one full charge of the Aukey? Is this correct?
Helpful answer
Hello, energy is measured in Wh (or joules) and this powerbank has 99.16Wh (26800mAh at 3.7V, the voltage of the Li-ion cells). The MacBook Air has a battery with 49.9Wh (4379mAh at 11.4V, so three cells in series). This means you will be able to charge your MacBook slightly less than 2 times, as 10-20% of the energy is lost (converted to heat) during charging.
However, the 4379 mAh are at the lower end. There are also devices with much larger batteries.
When calculating how many times you can charge a device, you should also take into account the losses during the charging process. It is not possible to transfer 100% of the energy from the power bank to the device to be charged. Expect a loss of about 20%. In addition, you cannot drain a 26'800 mAh battery down to 0%.
When calculating how many times you can charge a device, you should also take into account the losses during the charging process. It is not possible to transfer 100% of the energy from the power bank to the device to be charged. Expect a loss of about 20%. In addition, you cannot drain a 26'800 mAh battery down to 0%.
Hello, rather no. I estimate 3-4 charges. Energy is lost during charging, that's normal.