Review on Talentcell Rechargeable 72W 100Wh 12V/8300mAh 9V/11000mAh 5V/20000mAh Battery Pack: Ideal Power Solution for LED Strip, CCTV Camera, and More! by Greg Bloom

I bought this primarily to power my Masterbuilt Gravity Series smoker direct on the 12v DC connection. I've used it a half-dozen times now and works great. Went 12+ hours on two overnights with it powering the smoker and my Fireboard digital thermometer (via the usb jack) and it only dropped to 3/4 lights after 13 hours.The unit reads 12.6V from a full charge and drops slowly over the course of my cooks (as is to be expected). At 5 hours in, it was still 4/4 lights and 12.4 volts. At 10 hours in, it was still at 4/4 lights and down to 12.2 volts. It switched to 3/4 lights at 13 hours but was still 12.0 volts. I even tried it another day using the USB port with a typical cheap Revain 5v to 12v converter transformer cable for comparison and after an 8 hour cook (from a full charge) it was still 4/4 lights and 12.3v, so it doesn't seem like using the upscale converter causes any significant power drain.The included power wall wart has an led indicator that changes from red to green when the pack is fully charged. It also includes a Y-adapter cable that allows you to charge the unit while using it, which is very convenient. I've only had my unit about a month but so far so good.