The batteries of the DJI Mini 3 Pro and the DJI Mini 3 are partially compatible, but there are some limitations: - The DJI Mini 3 batteries are compatible with the DJI Mini 3 Pro and vice versa. - however, the batteries of the DJI Mini 4 Pro (which are also compatible with the Mini 3 Pro) are not compatible with the DJI Mini 3. If you try to use a Mini 4 Pro battery in the Mini 3, you will receive a message about an incompatible battery. To summarise: You can use the Mini 3 batteries in the Mini 3 Pro, but not the Mini 4 Pro batteries in the Mini 3.

Yes it is compatible with the DJ Mini 3 but I wanted to recommend. Buy a bigger one from Amazon you just have more buffer when flying, it's called flight plus battery

yes

To charge externally, you need the DJI Charging Hub: Dji Mini 3 Pro Two-Way Charging Hub A suitable powerbank with enough power is this one: Xtorm XB303 Voyager (26000 mAh, 60 W)

As far as I know, it has to do with the drone classification (EU). Since DJI stated a maximum take-off weight of 249 grams, the weight would exceed with the battery plus and the drone would fall into the next category. For this reason, it is currently difficult to order the larger battery in Europe.

According to the manufacturer's number, this is the 34 min battery.