Let me start by saying these EBL batteries have been my go-to for powering everything from window candles to Xbox controllers. The 2800mAh capacity sounds impressive on paper, and initially, they deliver—my handheld frother whirred like a champ, and ambient lights stayed bright for days.

But here’s the catch: over time, some batteries in my batch started acting like tired marathon runners. A few would barely last a night in my fairy lights, while others inexplicably swelled slightly, making them stubborn fits for my metal detector (annoying when you’re mid-treasure hunt). I even caught one refusing to charge in my EBL charger but magically reviving in a generic one—like a picky eater at a buffet.

On the flip side, their customer service is stellar. When I reported dwindling performance after a year (way past the return window), they treated me like family—offering replacements without hesitation. That’s rare!

Pro tip: These aren’t *truly* 2800mAh (my OPUS tester clocked them at ~2050mAh), but they’re cheap and eco-friendly. Just don’t expect them to fit snugly in every device—my pepper grinder still gives them the side-eye.

Final verdict? A solid 3.5/5. Great for low-drain devices and emergency backups, but pack patience (and maybe a backup charger).