Panasonic 9V Alkaline Battery

I put these in my kid's nightlight that's on for hours every night, and it's been going strong for months now without dimming. The energy efficiency is no joke — way fewer battery changes than the cheap ones I used before.

Our TV remote used to eat batteries every few weeks, but these EVOLTA cells have been going strong for over two months now. They handle the constant back-and-forth of channel surfing without any drop in power.

Swapped these into my smoke detectors and they've been running strong for months now without that low-battery chirp. The long-lasting claim seems legit so far.