Lithium batteries.
The reason why lithium batteries are expensive is that the cruising range and warranty time are better than graphene batteries. Second, in terms of price, lithium batteries are more expensive than graphene batteries. at the same time The price of graphene battery with specified specifications is about 850 yuan. The price of lithium batteries is higher, with a 60-volt, 20-amp lithium battery costing about 1,200 yuan.