Not particularly familiar with that shop, but look under SPEC and look for (or ask them):
CELLS: Best from the big guys, Samsung, Panasonic etc.
EXPECTED CHARGE CYCLES: Good batteries at least 500 cycles, excellent batteries, close to 1,000 cycles.
In my experience, the very best of batteries comes directly from the laptop's vendor, but if you just like the new battery to hold you up for another 12 months until u are able to buy a new laptop, go third party then.