If you have an older model of Optibike and need a new battery, one option that is cheaper and faster than going through us is using a third party battery rebuild company.
FTH Power Battery Repairs
We have used FTH with good results, they will rebuild your battery with new cells, and it will work like new. They are located in California so shipping is quick and not too expensive.
It is best to send them the complete battery still in the case, that way they can put it back in the case, so it’s ready to go when you get it back.
Typically this will cost around $800-1000 depending on the battery.