The system is designed to use a specific type of battery.
You probably can NOT put in a different type without causing more problems that it solves.
My personal opinion is: You already have made a bad decision putting that much money into a car that old.....with that many miles. I would not consider throwing any more money at it.
But if you insist, search the net for hybrid battery rebuilders.
You might be able to find one with all new cells for about half what Toyota charges.
"Reconditioned" batteries where only the "bad" cells have been changed are NOT a good investment.
You probably can NOT put in a different type without causing more problems that it solves.
My personal opinion is: You already have made a bad decision putting that much money into a car that old.....with that many miles. I would not consider throwing any more money at it.
But if you insist, search the net for hybrid battery rebuilders.
You might be able to find one with all new cells for about half what Toyota charges.
"Reconditioned" batteries where only the "bad" cells have been changed are NOT a good investment.