Brand new motorazr V3s. draing batteries. only 3 hours of use

DEAR
AT FIRST YOU COUNT YOUR BAT AND MULTIPLY 1.5 THEN YOU USE A ADAPTER AC TO DC WITH SAME VOLTAGE LIKE 6 V OR 9V DC
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If you have a new battery and it went dead that quickly I would check the charging system on the mower engine. Many of them use a voltage regulator and if it goes bad it will not properly charge the battery. Get the engine running (do not engage the PTO) and use a multimeter set on DC voltage. Place the multimeter leads on the battery and you should see approximately 13-14 volts DC at the battery terminals when it is running. If less then that then it's a problem with the charging system and further tests would be needed to figure out if it is a bad regulator or charging coil.

There is somthing that is not turning off or a short somwhere draing you battery..till you find the problem take the hot cable off the battery so it dont drain it

What could be draing the battery? A lot of different sources on your vehicle can cause a parasitic drain on the battery . Your vehicle has at least 10 different electronic control modules (computers ) on board . Any one of these not powering down could cause your problem . Plus there are other things too . Testing would need to be done to find the problem .Takes knowledge of electrical circuits an systems to diagnose these type problems .
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Running so few miles has accelerated the aging of the battery - the battery never had a chance to fully recharge in such small trips -  so now you have to replace it a year sooner than usual.
Just replace it.

It sounds like the battery has a faulty cell in the battery that never lets it hold a full charge or lets it bleed off. I would take it back and exchange it.

Could you provide a model number?? There may be some settings on the vacume that are continuing to use power even though it is not in use.

Thanks

There is no bulletin on this issue. You have a draw in the car. See my notes on dead battery, #4 in the page at the link below.
Do It Yourself Diagnosis and Repair

I contacted the manufacturer and they immediately sent out a new lithium battery. I received the new battery in 3 days, charged it, and the camera now works like new.

did you make sure you have a memory card in the camera, i know with mine it wont power up unless there is a card in it.

It sounds like you have a defective battery. Usually when batteries won't hold a charge for very long, then it's time to replace them. Was the phone brand new or used ? If it was used then I am surely gonna say battery, but if it was brand new then it might be something else. I would say that I'm 90% sure you have a bad battery. Hope this helps solve your problem.