The price on the batteries is a joke. 25€ for a battery... Knowing, that another drone, the Aquila16 uses the same battery (3,8V, 1100 mAh) costs 22€ for 2 batteries. But, whatever, I have 8 batteries. 4 has lower power, but still 5-6 min flight time, another 4 are like new.Unfortunately, I think you are correct. Batteries for Tello, which are still available, are a lot more expensive now than they used to be. I had considered buying a new battery but decided against it. Out of my 4 batteries, one no longer holds a charge and the other 3 only get about 7 minutes of flight time.
The same thing happened to my old Spark when it was discontinued - batteries became hard to find and the prices where almost double the original cost.
Chris
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