Further help needed. Took your advice and after I bought 2 batteries from Belarus (eBay) I stripped the Hybrid pack following your step by step guide. Now I've check every cell and they all show in region of 7.9-8.0 Volts. There is only one with 7.6, so the drop is only 0.3, not like you had 2.0. Where else can the problem be?
Thanks