Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Where can I get a replacement adapter to charge this shark vac..
Document: Purchased this unit for a family member as a replacement for an older Shark model whose battery would no longer hold a charge. As the new battery was more than 1/2 the price of a new Sweeper, I decided to get her an updated model with a higher capacity battery. As other reviewers have said, battery life is fair to poor.
Also don't forget to occasionally clean the rubber pieces and the dust flap, which gets lots of stuff stuck in it.I know others who have had this sweeper and not been as happy as I have because their batteries haven't lasted. You CANNOT keep it plugged in all the time, this will RUIN the battery. Instead, follow these instructions (copied from a user review for another Shark product):- Charge the vac for 24 HOURS without disturbing it when you first get it.
It's "suction" power is fair. Ergonomics are fine, however the handle seems a bit spindly. Like I said, if you don't expect too much, this sweeper will perform minor clean-up tasks to satisfaction. It is NOT however, a replacement for a full-sized vacuum cleaner no matter what size the room, particularly if you have carpet. Likely will not buy another Shark Vac of this type when this one dies.
There is a huge sticker on mine that does warn you that your battery pack will need to be replaced every 9-12 months, and I just ordered our first replacement battery. I went with another brand other than shark that will hopefully last longer than a factory battery, but the cost difference was $3.00, the off brand being cheaper. How to tell if your battery needs replacing is when it's no longer holding a charge.
I get the Walmart contract for 5 bucks and two years extended over the Shark replacement guarantee.....You want more assurance, buy a broom.....Why 4 stars on not 5 ? Because nothing is perfect and it might not pick up 5lb.
This stick vac has a cheap feel to it. In addition, the handle feels like you have to "break" it to get it to bend.The instructions do not tell you how long to charge the battery, but warn you not to overcharge it. Without a crystal ball, this is virtually impossible.Problem solved, after three weeks of very light use the thing died all together and was returned.Trust me, don't even bother.
This only takes a few minutes. Put it back on its charger and charge it again FULLY (at least 12 hours) after depleting it. Do this THREE TIMES IN A ROW when you first get your vac! Very important...charge, deplete, charge, deplete, charge, deplete, charge.- Contrary to Shark's manual, do NOT just replace the vac on its charger whenever you use it for a quick job. ONLY PUT IT BACK ON ITS CHARGER WHEN IT IS DEPLETED.
I had an older cordless shark, plain and relatively simple, but it did exactly what it was supposed to do. I broke the handle and could not get a replacement. Seems like Shark keeps changing just one thing so you can't replace an item. Well on this new one, the charger cord was lost and guess what - cannot find a replacement. Even for the short time I used it, I was not satisfied with it's performance - Money down the drain.
Am in desperate need of a good vac to get our German Shepherd's hair off our wood floors and throw rugs.Thought Shark was a good brand name, but all it does is push the hair around. The rugs are not plush. No reason this shouldn't pick up the hair.Disappointed and kicking to the curb.
My daughter admired her sister's Shark vac. It worked out great as it was their 16th wedding ann. Only problem is that they live 12 hrs. away. I've always had good success ordering from Amazon so was able to get what they wanted. It arrived in great shape and when they said it would.
Answer: I've had the same issue in the past.  Make sure it's the adapter and not the battery though.  I almost always start with Amazon.  However, you might also try contacting Shark Euro-ProX Customer Service Department at 1-800-798-7398. Agents are available Monday through Saturday from 7AM to 11PM ET. , or maybe access their website online.  Hope this helps.