Powering camera without original power supply or battery

I lost battery, but pretty recently, so I will try find it today it's still very possible

I have power supply 12v 1.25A

Resistor starter kit, it's have all basic values

Zenner diodes 3.3v and 4.7v 0.5w

And welding machine

I think it can work out if I find the battery and it will be pretty awesome

Then I need a good way of dropping voltage and safe way to open the battery

@maciulex okay we know we need to step the voltage down by 3 Volts (12V-9V)Now we need to find how many ohms of resistance we need, we'll use

R=V/A

R=3V/1.25A

R=2.4 Ohm

You'd be looking at 3.7 Watt power so you need a beefy resistor. Or you could use two resistors with the 1st resistor of 1/3 the resistance and the second resistor with the last 2/3 resistance. Something like 800 mOhms and 1.6 Ohm

10 Ω

22 Ω

47 Ω

100 Ω

220 Ω

470 Ω

1 kΩ

2.2 kΩ

4.7 kΩ

10 kΩ

22 kΩ

47 kΩ

100 kΩ

220 kΩ

470 kΩ

1 MΩ

and they had as i read in shop 0.5 w

they not good enought propably should i stack a bunch of them i had 10 of each

I had a lot of luck, I found DC adapter so it's like a battery, but with an already cable in it was going to DC adapter that's still lost

I've tried some voltage divider or just resistors, but Amps go to low also I tried power it with single 9v battery and red light start flashing but I don't know what it's meant but there are three options

1 camera is broken

2 to low voltage

3 to low Amps

I bet its to low amperage. It needs the higher amperage to run.