My car won't hold a battery charge

For some reason my car's battery won't stay charged.Ill jump it, it will start and then ill drive and it will be fine.Next time i go to start my car, its dead again.
yes i give the battery time to recharge, i drive for about a half hour.
no i don't need a new battery, its only about 3 months old.

another thing is that the car is idoling rougher than usual. I don't know why.

also for some reason everything that is plugged into my cigarette lighter [radar detector and some interior lights] will turn off and then back in really quickly while i'm driving and this has never happened to me before besides the past 2 days when i've had to jump start my car FOUR TIMES!

when i turn the key to start the car there's usually a few clicks and then nothing at all. Or just nothing at all.

its a 97 honda civic ex, manual transmission.

Maybe you have something draining the energy after the car is off, somewhere a wire could have shorted and that could be the cause, the reason it is probably idling rougher is cause the alternator is charging up the dead battery.

It's possible for even a new battery to have one or more dead cells in it… Have the battery tested

The first thing to check is the battery terminal connections. Make sure they are clean and tight, and that the actual terminal connectors are not damaged.

What you have is a parasitic voltage discharge. In other words, something is draining your battery. This can take quite a while to figure this out. In the meantime, when you are not using the car, disconnect the battery. The other option is to fit a priority start device. This will not fix the problem, but what it does is when your voltage gets to 9 volts iy switches everything off. The very same thing happened to my Jaguar. It took me 6 months to find the problem

You have a parasitic load that is occurring somewhere in the car… A glove box light, trunk light or one of the many on board computers that is not powering down and is staying active after the key is shut off. You need to take the car to a qualified shop or dealer and have the problem checked, the charging system needs to be verified that it is charging at the proper rate. You are also not fully charging your battery by just driving it around, when a battery is discharged to the point it will not crank the vehicle, or even worse completely dead no lights or anything when trying to start the car, the battery will begin to sulfate (internal plates begin to come apart) each time it is "deep discharged" as you are describing you shorten the battery's life and it will only last a fraction of it's rated time. The only way to properly recharge the battery is with a plug in charger, an automatic one will select the best amperage based on the battery's state of charge, but manual ones are O.K. As long as you don't leave them on too high of a setting once the battery begins to recharge. You could diagnose this yourself if you have a good knowledge of electricity and using a DVOM. The DVOM should be on the amps setting and remove the fuses one at a time until the excess load dis-appears. You could also perform some volt drop checks to make sure that the battery cables and wiring from the alternator back to the battery are in good working order. If none of the above makes sense don't waste time and money throwing parts at it and guessing, take it to a qualified shop or dealership.