Oops. My bad. Eneloops are some weird hybrid of alkaline and NiMH.
Ok. Just went back and did some research (read wikipedia and a few other websites. which I should have done earlier BEFORE my post. ), it's alkalines which are a no-no.
There might be a bad cell in your NiMH batch. You should get the cells checked for capacity.
Actually eneloops are also NiMH, just that it is LDNiMH (Low discharge NiMH) and they are the first to market for these LDNiHM batteries. not really a hybrid.
GP2700 is a high capacity standard NiMH battery. Meaning it will not hold its charge well. Once charged, it will start losing charge as soon as it is removed from the charger. LDNiMh only comes in lower capacities of around 1800 to 2100 mAh