what about these?
http://cgi.ebay.co.uk/2x-11-1v-900ma...ht_2873wt_1087
I can find 2mm in height to squeeze them in. would need to hook them up in parallel to give a total 11.1v and 1800mah and then just charge then individually through the balance port...
does anyone know if I can charge through the port with the charger set to 3 cell lipo at 1A? wired in parallel aren't they same voltage double capacity?