 The R1e used a laminated lithium-ion battery which was developed by NLE, a joint venture established by FHI with NEC.The design goal was for of city driving range using a designed capacity of 8 kW-hr with a top speed of , and a battery life goal of retaining at least 80% of initial capacity after seven years or .Measured performance of the battery pack included a recharge capability to 80% capacity in eight minutes with a special rapid charger using 200 V, or to 100% charge in eight hours on a standard 100 V plug.