Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: How long does the unit stay charged? My husband works offshore and leaves his truck in a parking lot for 6-8 weeks will it still be charged?
Document: I live on a college campus, so most everything is within walking distance for me. Add to that the fact that I'm a total shut-in, and that means my car can just sit there in the parking lot for weeks at a time. Not surprisingly, the battery is often dead.I bought this gadget so that I can jump start my car, figuring the battery would get charged while I'm driving anyway. It works quite well. Lets me start my car two or maybe even three times before it gives out.
My husband is currently deployed, and I let his car sit too long and the battery died (oops). Well, we had been meaning to buy one of these for awhile now, because it's always good to have something like this and not have to rely on strangers. I decided that now was the perfect time to buy one. Especially since my husband's car was in the garage and I didn't feel like pushing it out in order to jump it.The unit arrived in the mail and I plugged it into the wall and charged it for 24 hours.
I dont understand all of the negative reviews. Mine works great and have had it over two years. Its rechargeable (which is a must in my industry) and packs enough punch to jumpstart my heavy duty Ram truck. I would (and have) recommended this unit to friends and family.
As long as I kept the jumper charged it did jump my battery just fine. 1 year warrany requires me to pay to ship unit back to manufacturer - too much money considering the cost of the jumper. I originally bought the jumper for my boat in case I had a problem on the water. But as best I can tell from the pictures at their web site, it looks like all the similar Wagan jumpers all have plastic clamps. I can't afford to worry that my jumper might break again when I need it.
The product does not do a lot of functions automatically e.g. charging shut off when it is charged, the manual instructs you to unplug. No USB plugs. The wire are too short. Too narrow of a base.
After 36 hours the battery had crept up to about 8.5V indicating the battery is bad. Whether the charger circuit is also bad (or caused the battery failure) I do not know. The unit is in the trash now!
had this a little while now and today got to use the jumper on a friends truck and it worked perfectly. charged it up when i got it and played with the compressor and it worked fine. had not recharged it in about a month and used the jumper today, it worked good. i am satisfied with it. had several that were bigger than this one and they did not work as good.
Great features for the money BUT instructions say that if you overcharge the unit, it can be damaged. The problem is that there is no gauge to tell you how charged it actually is. Yes there are lights, but they are a bit more cryptic.
Purchased first unit in February of 2012, arrived DOA. After first contact with Customer Service, they wanted me to pay for return shipping for this (heavy) defective unit. We finally got that straightened out and after 2 or 3 weeks (!) a replacement unit arrived, which worked out of the box. However, here we are in December 2012 and the second unit will not take a charge at all. Some real quality control problems with this company and product.
With 900 amps, I expected a lot more. Wouldn't even start a garden tractor in 20 degree temps. I hooked my AC charger up and it started right away. The air compressor is slow, as well. I bought it to use on my outdoor power equipment which sits for a long time and often needs air in the tires and occasionally a jump start. This thing just doesn't cut it.
Answer: yes