Cctv camera

[oj88]

I am planning to add at 2-3 more IP cams to my current one. I'm thinking of buying a 4-way power supply splitter to power up the others. If my current tp link IP cam is 9 volts 0.6 amps, then I would need at least a 9 volts 2.4 amps for all 4? There are 2 other variants I saw available, a 2 amp and a 3 amp. If I switch to a 3 amp, won't it overload 1 cam or say 2 cams only if I plan to add cams 1 unit at a time over several weeks or months or even limit it to 3 only. Also, will a 25 meter length work? I think this is the set up for 4-8 cam CCTVs which have wires as long as 20 meters? Thanks.

A 9V with 3A (or higher A) power supply is fine as long it's of relatively good quality. Some crappy PSUs will say it's rated for 3A but folds at 1.5 - 2.0 A.

The cameras require 9V but will only pull the current (Amps) it needs.