As long as the voltage is the same the battery would be compatible.
It requires 2 x 900mAh NiMh batteries.
Longs the voltage is the same 1.2v then you can use the batteries on the website.
Yes that is correct.
Yes these are compatible with the Durham. They take 2 x AA 1.2v batteries.
If you can't 1,500mAh then go for 2,000mAh.