a Danish company is offering a product called "Battery Optimizer" which basically does the same as a Powercheq, but has better specs: it can transfer up to 5A and keeps the batteries within 10mV difference, instead of PCs 75mV.
Details here: http://www.powercharge.dk/link.asp?menu=16&submenu=34
A German dealer has tested them and now sells them for 49 Euros, about half the price of a Powercheq!
(Believe it or not, but Powercheqs are sold for 99 Euros = $135 here! :sick: )
I have not tested them personally yet as I already have PCs in my EVT168 and eGo scooter, but I consider buying some for another EVT scooter that needs new batteries anyway.