What is the battery capacity of the BMW i3 and what does 60, 94, 120 Ah mean? [ANSWER]

BMW is regularly increasing the battery capacity of its only electric vehicle to date: the BMW i3. However, they have a rather unusual, albeit perfectly correct, markings. What is the battery capacity of the BMW i3 120 Ah? What does "Ah" mean anyway?

Let's start with an explanation: A - ampere hours. Amp-hours are the real measure of a battery's capacity, as it indicates how long a cell can provide electricity. 1Ah means the cell/battery can generate 1A current for 1 hour. Or 2 amps for 0,5 hours. Or 0,5 A for 2 hours. And so on.

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However, today it is more and more common to talk about the capacity of batteries using a measure of the energy that can be stored in them. This is also a good indicator - so we give it especially for our readers. battery capacity of the BMW i3 according to the original standard and converted into more understandable units:

• BMW i3 60 Ah: 21,6 kWh total capacity, 19,4 kWh useful capacity,
• BMW i3 94 Ah: 33,2 kWh total capacity,  27,2-29,9 kWh useful capacity,

Battery capacity BMW i3 in Innogy Go (c) Czytelnik Tomek

• BMW i3 120 Ah: 42,2 kWh total capacity, 37,5-39,8 kWh useful capacity.

If you want to check the usable battery capacity yourself, follow the tips below. However, it is worth remembering that the measurement should be taken after the car is fully charged and preferably at a temperature of about 20 degrees Celsius. The values ​​may differ slightly depending on our driving and charging mode..

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We add that the portal www.elektrowoz.pl is currently the only Polish (and one of the few in the world) media about electric vehicles that regularly lists the total and useful power. Manufacturers often report the first issue, journalists publish it, and this the last value - net power - is crucial when it comes to the actual mileage of an electric vehicle..

The useful capacity of new cars is high, but it drops rather quickly in the first thousand kilometers. This is the effect of creating an SEI (solid electrolyte interfacial layer) layer on the anode, that is, an electrolyte coating with trapped lithium atoms. Do not worry about it.

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