I have a jump n start brand battery jump starter and the clamps have broken. I need to find out where I can get some more replacement clamps and cables

Locate the battery and then put the positive jumper (clamp usually red) on the positive + battery post and the negative cable clamp ( black) on the battery negative - post.

Good clamps are available from NAPA, Autozone, O'Reilly's, Pep Boys, Car Quest, and other suppliers. Check to see if the existing wire terminates in a crimped lug. If not you need to look at the new clamps to see whether they are designed for attaching directly to the wire strands or if they require the wires to be gathered and crimped into a lug to go under a single screw. Fasteners to clamp large wire under a screw are similar to photo here.

If you have a battery charger, charge the battery. You can determine if the starter is good by by-passing the solenoid and jump starting the starter. First make sure all connections are clean and tight- from the battery to solenoid, to starter and make sure the negative cable is connected to a clean part of the frame.
To jump start the starter take a jumper cable (car jumpers) and connect one red end to the battery Positive Terminal of the battery, and connect the other red clamp to the large terminal of the starter. You can just momentarily bump the starter, by just hitting the clamp. Or do the opposite -connect one clamp to starter and bump the pos. terminal on the battery. MAKE SURE YOU DO NOT GROUND OUT THE CLAMP ON THE STARTER BODY! If the starter works and turns the engine over, the problem is the solenoid If the engine does not turn over as it should, then the starter is bad..

The starter has to throw it's gear out using centrifugal force. The speed of the starter has to be enough to overcome the spring inside. It is either a little seized and needs to be rebuilt and greased up, or the battery isn't powered up enough to get the right speed to engage properly. In that case clean the battery posts and clamps well, then charge or replace the battery. To know if the battery is bad wait till it is charged... if it still doesn't engage try again with booster cables from your car etc. and see if it suddenly works fine.

The fact that a jump made the thing work really rules out starter and solenoid. If you got a clicking but no start, then a jump fixed the problem, there are really only 2 possible causes. Since the first is a dead battery and you have said the battery was fine, then it has to be the second, which is a poor connection between one of the leads and the battery. Sometimes, oxidisation builds up under the connector and this will cause the connection to fail although it looks good. Clamping jump leads to the connector probably disturbed it and made the connection good again. Remove each cable clamp, clean battery connector and the clamp on the cable thoroughly with emery cloth and reconnect, As you're doing this, also check that the connections that hold the cable into the clamp are good and tight and have no corrosion.

REMEMBER that if you disconnect your battery, you may loose the security code to your radio/CD. An easy way to avoid this is jump onto the cable connectors from another battery (Like you were jump starting it) so that the power to the radio is maintained during the procedure.

If you cut them both then you'll have to open it to see which one goes ti the battery + and -

Dead battery. Try jump starting it. Then stop by any good parts store (Advance, Autozone, etc) and have them to a FREE charging system test and a FREE battery load test. I suspect your battery has left this planet...

If you have confirmed that All Battery connections are clean and tight...and it won't jump start...this is an indication the starter will not engage...you can try to tap the starter with a hammer...then try to start again...sometimes this is a temporary fix...but also confirms the starter solenoid need to be replaced...or like in the old days...we used to rebuild them...no longer cost effective...the starter should cost about $150. It is a high energy small unit...hope this helps:)

Could be the cables or the starter. Remove the starter and have it tested.

sounds like the starter is not engaging the flywheel if the starter make noise like a power saw and the engine is not cranking may be the starter solenoid is not working I have seen this happen whit brand new starters now before you change your starter again ask some one to turn the key for you and see if the crankshaft or any otter pulley is rotating. if noting turn then replace the starter again and ask them to tested for you at the store and see if the gear comes out like it shut. If you see the crankshaft and pulleys rotating but the engine wont start you have otter problem if the engine hardly turn whit a fully charge battery or jump start from another car take all spark plugs off and tray again whit out the spark plugs if coolant comes out of the engine you have a floated cylinder and a blown head gasket. Note may be a good idea to change your battery clamps wile you are at it or at leas clean then using a wire brush bad contact on battery clamps causes to lose power doing start. hope can help you good luck. :)