Any electric car that uses batteries needs a charging system to recharge the batteries. The charging system has two goals: To pump electricity into the batteries as quickly as the batteries will allow. To monitor the batteries and avoid damaging them during the charging process.
A filibuster is a parliamentary procedure where debate over a proposed piece of legislation is extended, allowing one or more members to delay or entirely prevent a vote on the proposal.
Since the filibuster is a legislative tool used by the minority party (Democrat or Republican) to avoid being steamrollered by the majority, members of the minority (in this case, Senate Republicans) have a vested interest in opposing reforms that would make it more difficult to mount filibusters.