3 ms·

Now you’re right back where this started - accounting for the cost of batteries. Oh, and my stomach says dinner is most definitely not irrelevant.

• ben_w 8y ago
  Said batteries cost about the same as the LEDs, which — combined — cost less than the electricity they use in their working life.
• stale2002 8y ago
  It is an irrelevant portion of total electricity usage. It doesnt matter if a very small portion of your electricity usage has high costs.