Review on Rechargeable 12V 3000MAh Lithium Battery Pack: Power Bank For LED Strip, CCTV Camera & More by Marc Tufa

The battery is very good and definitely surprised me. I initially used it to run a Lepy LP-2020A class D amp for a Bluetooth speaker project. The speaker got quite loud before I noticed voltage drop (the amp's light was dimming slightly). The battery life was outstanding while running the Lepy amp. My car had recently broken down for good and I decided to see how long this thing could run my car stereo for. I ran a double din head unit driving two speakers for 3 and a half hours before the battery died. This was the first time I could the battery. This is also wear the charger showed it's weaknesses. The charger cannot charge the battery in a reasonable time. I looked at it and it says it can only output 500mah. 500 mah is lower than most usb blocks! My problem however is that running the car stereo, the battery still discharges. Not a sufficient charger for the job. That's all I can say.If it wasn't for the terrible charger, I'd give 5 stars. The battery is good, why not the charger?I included a photo of what I was running the battery off of which was quite impressive. That little box ran a double din head unit at decently loud volumes for 3 and a half hours.