3 ms·

I don't know the specs of the new MBPs, but my mid-2015 MBP's battery is 7530 mAh at full charge. You can get portable charger batteries that are much more than

• dancek 10y ago
  You can't directly compare mAh values, as they're an unit of electric charge. The amount of energy depends on voltage, too. Power bank manufacturers are basically running a marketing scam; the batteries they sell have 3.7V while USB uses 5V. What's more, the MBP battery voltage is something around 12V. So the 26,800 mAh power bank has a capacity of 26,800 mAh * 3.7V = 99,600 mWh = 99.6 Wh of energy. Meanwhile, the 15" MBP has a 76 Wh battery. So theoretically you can do about 1.3 charges; realistically I'd say one full charge.
• leoedin 10y ago
  A Macbook Pro (or indeed any laptop) battery operates at a voltage much higher than that of your phone or a powerbank. The actual power available from the battery (in Wh) can therefore only be compared with another battery's quoted capacity if the voltage is taken into account. A MBP battery might be a 11.1V battery, while a portable power bank capacity is almost certainly quoted as a summation of the capacities of the 3.7V cells inside. The capacity of the power bank must therefore be divided by 3 to give the equivalent capacity in mAh at 11.1V.
• curried_haskell 10y ago
  That's not how electricity works.