I am planning to buy batteries for my rc car.
NiMh camera batteries (1.2v/2800mAh) is good or
Lipo (7.2V/900mAh).

lipos are good ,last long and they have high capacity and backup then nimh , but the only negative point is they needed to be handle carefully , i have 2 4000mah 2s and 5000 mah 2s never used packs turnigy , let me know if you required

Hi. I have a pair of 3000mah NiMH 7 cell. Going very cheap

Go for lips batteries
https://rcmumbai.com/multi-rotors-parts/batteries-and-accessories.html?___SID=U&ajaxcatalog=true&battery_voltage=78

I have NIMH brand new pack.. contact on 9029994574

I have Wolfpack 4200 mah 35c lipo which started swelling little bit.
What to do now. I have no idea