It's not the "same" memory problem, but they can benefit from the occasional full discharge/recharge cycle. Plenty of info here -
http://www.batteryuniversity.com/. See this page in particular -
http://www.batteryuniversity.com/partone-11.htm
Anyway, that's not the point here. It is generally well understood that NEW NiMH batteries take a few cycles before they reach full capacity - 3 cycles at least. After the first charge/discharge these new 2800mAh were only giving between about 1000-1500 mAh. Repeating several "refresh" cycles brought them up to the best performance that they could muster - around the 2000mAh mark +/- 2000mAh. I paid for 2800mAh performance and what they sent me was batteries that fall short of that by, on average, about 28%.
That is not acceptable, but from what I've read about 7dayshop it would be more trouble than it's worth to bother making a fuss. They might refund the product cost, but I'd have to swallow postage costs, probably in both directions. In any event, why was my honest and accurate review not published on their website? No wonder all their products have high * ratings if they edit out the less favourable reviews. Would you trust them after an experience like that?
Note, I didn't set out to measure the batteries and make sure I wasn't getting cheated. It's simply a natural function of the charger to provide that information when on a Test or Refresh cycle. If I didn't have a sophisticated charger I would probably never have known how poor the batteries are. I could have got high quality Hybrio batteries for less money from Asda, with higher performance and a long shelf life to boot. I feel cheated by 7dayshop and I have learned an important lesson about dealing with that company. If they were in the UK I would have contacted Trading Standards to make sure other people do not share my experience.
EDIT : These reviews are not terribly up to date, but look here for other customers' experiences with 7dayshop -
http://www.romulus2.com/feedback/company.php?439