NERMAK 3.7V 3200mAh USB Rechargeable Lithium lon Battery for Flashlights, Headlamps, Bike Lights, Bl...

Our Experience

After using this NERMAK battery pack for a few weeks, I found it to be an efficient companion in my daily commute. The 3200mAh capacity was just right for powering my bike light during evening rides and charging my phone on-the-go. One thing I particularly liked was the compact size; it fit neatly into my bag's side pocket without adding bulk.

However, a minor critique would be that while the battery level indicator is useful, it's quite faint. I often had to squint to see how much juice was left in broad daylight. Other than that, it's been reliable and practical, exactly what I needed as a busy professional balancing work and fitness routines.