I'm not sure if this counts, but I always have trouble with cord lengths for mowers and strimmers. They just don't seem to take into consideration the length of gardens.
I have 2 mowers (a roller and hover), and a lightweight strimmer. And have to use an extension lead for all of them to reach the far end of the gardens, and mine are not that big to be honest. The strimmer cord is ridiculous. It doesn't even reach the end of my patio, let alone touch anything strimmable (Is that a word?
). I had to purchase an extra 5 metre extension for that one.
Although it's not a huge problem, and the descriptions in catalogues/websites normally state the cord length, it's still a pain for me. 
Not sure if that helps.
Becks.