Talentcell 12V Lithium ion Battery PB120B1, Rechargeable 38400mAh 142.08Wh Li-ion Battery Pack with Dual DC 12V and 5V USB Output for LED Light Strip, CCTV Camera, Mobile and More

I never write reviews but I have been using these for 4 years to power my film set sound recording equipment and they are so durable only now am I starting to notice a mild decline in battery life. I have used these for 12 hours a day, 5 days a week, 8 months out of the year, since 2021 that’s close to 10,000 hours of work on these 2 batteries.My only complaint is I had to change the output port to a locking mini xlr so it wouldn’t come unplugged but I suspect most people won’t be wearing this while running around the jungle. I love these little guys and they are airline safe. I have dropped these so many times, used them in sub zero weather and on location at volcanos, and never had an issue over heating or loosing charge. I even shorted these out a few times because I do a bunch of custom cables and they act like nothing happened.Not sure if the product is the same as what I bought all those years ago but if it is this is the battery to get. Rugged, good charging speed, capable of powering demanding pro level film equipment, small enough to throw a few into a bag. Most importantly , they are a quarter the price of standard film industry power solutions.I’m ordering 4 more after I post this.Truly the ultimate no frills reliable power source.

This compact LiOn battery is unique. Most paks have 2500-6000 Mah USB power output. This gem has 384,000 Mah capacity with both 12 VDC (2155) 7 VDC USB-A outputs. Here's the rub - both outputs can be used simultaneously!At power on, existing charge is displayed in a 4 bar light display.I've only charged it once thus far and have used it 4x. More after I've used the charge up & need to recharge it a few times to see how long it lasts.

Since the thing I wanted to power had a female connector, I bought a male-to-male plug coupler (2.1mm x 5.5mm) to operate it. https://www.amazon.com/dp/B07GKMYPJD

I have to use my cpap machine or I am miserable. The electricity, in Mwanza Tanzania went out about 1 am most nights, so to use my machine I relied on this power pack. This was almost the largest capacity pack you can carry on airlines. It worked so well with the adapter for my Phillips Dream Station, that I keep the power pack plugged in between, my cpap and the outlet at home. If there is an electric outage, my machine keeps running and I keep sleeping. This has been so easy to set up, and use.

I have two sets of photos the one showing mAh is the drain test by 5V battery meter. The other photo of energy usage is a smart wall energy monitor to see how much electricity it needs to fully charge the depleted battery.For the drain test I kept the discharger at a constant 5V 1A and also tested the max output. Came out to 2.5A, so it can charge/power most devices that you use on the daily. Once you pull around 2.7A that's when the battery shuts off to protect itself/can't output that amount of power. But as you can see I got a pretty low number from 38,400 so that made me wonder how did they get this number? Since there are 12 cells inside and you divide that by 24435 you get 2000...they claimed 3200 per cell...riiiight.While charging I monitored it every 15 mins to make sure to turn off the charger once the battery was fully charged and it came out to .19kWh or 190Wh so it takes a decent amount to charge. But still, how did they get 38,400? Seems like so number they made up and anyone can say their cells has 3200mAh. Since I had opened up my unit and it was held in with sticky foam pads and hot glue.... talk about quality. So of course, 3200 x 12 makes 38400.I ran the charged number I got so if we take 190Wh and multiply by 12V we get 15833mAh. Now we need to do a conversion rate from stepping down the 12V to 5V so 12 divided by 5 equals 2.4. 15833 x 2.4 = 37999mAh.So there you have it, the company did some wild math to claim 38400. Are you truly getting what is claimed...in theory yes but in reality no. Would I recommend this battery? It really depends on what you're trying to power. If it's a medical device sure but for anything else, no look elsewhere.In short, you are only getting to use 62% of the rated capacity...yikes!I hope this "review" was insightful and you should know what you're getting before you purchase.

Long power supply for cpap machine

I like the compact size and the battery life (so far). Seems to be well built. 38400 mah is a lot of juice. I have high hopes for this device as I am into a solar project so please don't disapoint me. I've purchased three and plan to purchase more. Keep up the quality and you will get fewer complaints and sell more. As of right now I give this a 5 + star rating. It charges all our phones and Kindles and provides an emergency light. No more candles and smelly oil lights in power outage. Really good thing to have during and outage or emergency. I've constructed a 12v dc light out of easy to find materials. This light is easy to build, budget friendly, and is good for a work or reading or camping light.The lithium ion batteries are superior to lead acid by a long shot. They cost more but in the end lasts longer and are more reliable. It looks like we are entering the age of power outages and monster storms. This little device would be worth its weight in gold if your area happened to hit with lengthy outage. It will charge phones for a long time, longer if you have solar panels. I like it. No one is paying me to say this. To the manufacturer I would just say, keep up the good work and put quality above profit, you'll sell a lot of these, I promise you that.