Hterag
lvl.4
Flight distance : 961978 ft
China
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This has been asked for all the other recent DJI drones. Although this drone is the most likely to get it, I don't see this happening for two reasons... One is, that DJI wants to sell more batteries... The other is that the Mavic battery is rated for 43.6Wh and before we go any further, time for a quick explanation for anyone following.
mAh vs. Wh???
There is a big difference between a 5000mAh power bank and a 3830mAh Mavic battery which means the Mavic actually stores almost the same amount of power. The difference is the voltage.
For example; a 5000mAh (milliamp hours) power bank will generally operate at 5V (volts) which means the power it holds is 25Wh (watt hours) (5000mAh = 5Ah, 5V x 5Ah = 25Wh).
With the Inspire one, the batteries are rated at either 99.99Wh or 129.96Wh (depends on the battery) so this means your 5000mAh power pack could charge one of them to, at best, about 25% assuming perfect efficiency. For reference, the Inspire 1 TB47 batteries are 22.2V and 4500mAh, but at first guess it might look like a 5000mAh power bank could charge one!
With the Phantom 4, the batteries are rated at 81.3Wh so you'd get about 30%...
And with the Mavic, rated at 43.6Wh, you'd get just over half a charge.
The misconception
The problem for many people (and I'm not saying you're amongst them) is they think in terms of mAh and that a 10,000mAh power bank would easily charge a 3830mAh Mavic battery twice. Well, if it were the same voltage, that would be true. As it is, a 10,000mAh power bank will store 50Wh but that's with perfect efficiency, voltage converters (to go from the 5V output on the power bank to the 11.4V on the Mavic) would lose some of that power... The best you could hope for is a single charge of one of them.
The conclusion...
So, in conclusion, I appeal to manufacturers and users to stop mentioning and talking about the milliamp hours (mAh) because it's not useful for comparing different systems and different batteries, use watt hours (Wh) instead!
Here ends my rant, I hope that it's informative to you and others.
Given the size, cost, weight, etc. of power banks, wouldn't it just be better to buy one more Mavic battery?
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