Streamlight SL-B50 Battery 1 Pack

Was a bit worried about buying a battery pack on its own, but this one matches my light exactly and the charge holds up well during my nightly walks. The SKU on the package lined up perfectly with what I needed, so zero guesswork. Feels solidly built, too, not like the cheap knockoffs I've tried.

Plugged this into my light and it fit securely with no wobble. The charge indicator is a nice touch that I didn't expect for a replacement battery.

Battery life is solid—I got about 3 hours of consistent runtime before it started to dim. The charge indicator on the side is a nice touch for checking power level.