a used batt from a 2016 bike will be long dead buy now if it was used my original 400w batt i had with bike still works but has no capacity left in it and as it uses can bus cant do bugger all with it either.
these packs dont like to not be used a guy the other day had a bosch batt and did not use it for 2 years and the bms drained it flat lost the programming and bricked it.
not many ppl on this forum have giant ebikes and i cant find anything on ebay so your only option to get it going is to buy a new batt with 2 years warranty.
any 2nd hand ebike you buy you take the cost of a new batt straight away.
