Molamola, look at the Black and Decker rechargeable ones. No starting problems at all and no cords like the electric ones. I have one and just love it because I don't have to worry about getting it started.
Yes, so if you need more whacking time, just steal the battery from your husband's drill. LOL Actually, really kidding. They come with two batteries and I actually own just as many power tools as my guy.
My husband was having trouble starting our Craftsman Weed Eater, both in pulling & keeping it "lit". He has had 1 shoulder surgery & needs another, Lowe's, in our area, sells several different models from Troy Bilt with an optional electric start thingy. That was $34.95. The salesman was kind enough to tell us that you could put the right size of Allen wrench in a drill to start it. Since we have 3 acres, that makes it handy to bring a drill with you rather than having to go to the house to restart it. The model we picked was 4 cycle with a curved head for $174.95. He threw in a strap since that model didn't include one. There are several attachments available.
Since we have had rain/hail since we purchased it, I can't report as to how well it works, but will post later.
The salesman said someone who purchased it cut off an Allen wrench so he would have a straight "bit" & it worked great.
It took awhile for the rain to stop, but the elec. start is a big hit. None of the Allen wrenches, including metric, were compatible. But, instead of buying the $34.95 starter, Lowe's has a Troy Bilt bit that fits in a drill for $9.95. It has to be a high speed drill. It started right up with the starter & by pulling the rope.
As a side note, all of our Craftsman attachments fit the Troy Bilt.