are all balance boards to charger connectors the same? i have a 6 pin connector to my sigma mini eq. my balance board has gone south. wondering if i am able to buy a balance board or a new charger?

Most should be the same, but check the connectors are the same.

Most standard boards are for up to 6S (7 pin), you need a board that goes up to 4S, that is a bit different but not impossible

Just plug it directly to the charger. Heard too many horror stories about people dropping screws or whatnot on the balance board shorting out the battery and charger.