I have a 1993 honda accord, just bought new battery,when i let it sit over night car wont start have to jump it off, something is killing my power

Sounds like something is running your battery down at night. Have you added any new equipment to vehicle? Something is pulling ampage.

I have seen issues like this on other Honda's and the problem turned out to be the ignition starter switch. Do this, jumper power directly to the starter solenoid trigger wire and see if the engine cranks.

if it jumped time then you cant,it needs a new timing belt or chain wichever your cars has.pretty major job even for a tech

Has a parasitic draw (drain) on the electrical circuit ! Watch this video !
Improved Methods to Find Parasitic Draw Battery Drains Overnight


The BEST Way TO Perform Parasitic Draw Test

Something is staying on or a control module isn't powering down .

sounds like you got a short somewhere in your system.look for burnt wires or malfunctioned lights. especially in the rear. tag lights are common these days

you are having a problem with your alternator. the battery has a main purpose to start the vehicle, keep computer memory, and give power to electrical components when the key is in the on position. the alternator charges the battery and gives power to electrical components when the vehicle is running. now when you hit the brakes there was an extra load added to the alternator and if the car died then the alternator is running very weak and needs to be relace.

Did you check battery (load test) & connections at other end of battery cables for clean & tight.

Hi
Try to jump start the car.
Put the jump leads on and leave it for 10 mins
that will charge the battery up
then try and start.
Also check the starter motor.

could be a couple of things. first make sure the battery is good for sure (have it tested and charged if needed) check for airflow (rodents...yes little animals can crawl into your air intake and make a little nest...i had one that actually chewed on my air filter a bit) and clear it out. Lastly check your fuel, see if the lines ran dry. after sitting there for a while the pressure in your fuel line dissipates and could actually drain completely into your gas tank...which means you have have to keep trying to start untill all the fuel lines are filled with gas. You could also just click your car on (not the last switch which starts you car... the one before it like when you drive) and just leave it for a few minutes.It powers up your fuel pump and pressurizes the lines. These things SHOULD get your car started otherwise something might have frozen up, like a fuel pump or starter or the engine itself although i would think the latter unlikely. check the 3 things first...Battery, Airflow, and Fuel delivery. hope this helps

My mind goes to battery, starter, or kill switch.
If you can play the radio and the lights are working, but you get nothing when you try to start it (not even a clicking sound), it's not likely the starter, either.
You may have a kill switch engaged. Some Honda cars have a kill switch that disables the engine from starting. (Anti-theft device installed). Check your user Guide to see if there is info there.
Often, there is a button you need to push or some other trigger to release the lockout.
Here is what I would try:
1. Conact the seller, if you can, to inquire.
2. Call AAA. They may know the various options, and did help me when I had trouble.
3. Call a Honda dealer to inquire about options for disabling it.

Good luck.