Normally, our cart remembers each buyer's cart contents for up to 24 hours from the last time they view their cart (or until they clear their browser cookies, whichever happens first). If you want each buyer's cart to persist longer than that, you can specify a number of days using cart customization code:
http://www.e-junkie.com/ej/help.custom-cart.htm
E.g., if you're not using any other cart customizations, then you'd just add these lines to your View Cart code on every page, just before the "// -->" line in the standard code you obtained from Seller Admin (here the "7" indicates each buyer's cart will persist for 7 days):
function EJEJC_config() {
EJEJC_CDAYS = 7;
}
