How to know the kind of battery
 

Is anyone know this kind of battery : 7 cells pack, large battery type 8,4 V 1800mAh. The sticker that is on is : NP (nuclear power) and there is a serial number KR-1800SCE. Someone know if it's a Ni-Mh or a Ni-cd ? The color of the pack is blue with a green sticker.

Thanks

I don't know of NiMh SC cells that low capacity, probably NiCd.

It would help if you gave physical measurements of the dimensions.

Cells with a "KR" part number are almost definitely Sanyo Cadnica cells which are nickel cadmium. The 1800 is obviously the capacity and the SCE refers to Sub C sized cells (the E is likely a revision or subtype identifier).