Well, I didn't make it up, the 6-pin connector is what the DR200 is fitted with as standard.
I could get a 900mAh battery that I found from eBay
but it's not the original one and I don't know how reliable it can be, but anyway it has the original connector.
I'd have to wait about a month to get it at home
and I'd pay about 27€
While the 1400mAh one I could have it in 2 days because it's on sale with Prime on Amazon for 18€, but I'd have to
transplant the connector removed from the old battery to that one.