12V/3000mAh Lithium ion Battery Pack with 5V USB

UPDATE Additional into: I went ahead and bought the 12.6vdc/2amp power pack (Also made for this unit by Talentcell). Now I know I have all the power I need for both charging the battery pack and operating my 2 wyze cameras simultaneously. And I know it's powerful enough because the powerpack (original 500ma and the 2amp I just bought, has a red light when charging, and it turns green when all is charged); and with the 2amp it goes green after the battery pack is charged EVEN with the 2 wyze v3 security cameras connected. Again; great product and great company support. Highly recommend.I bought this to be a UPS (Uninterrupted Power Supply) for my Wyze v3 security camera during power outages. The seller was very quick and helpful in answering my questions on if it could be used as a UPS system for USB devices. They quickly answered all my concerns. I received the item, made sure it was completely charged, then with it still plugged into power I connected my camera to the USB port and made sure the power switch was on. The device powers my camera perfectly. When I manually remove the AC charging power pack, the camera doesn't even blip. Works perfectly. The device has built in safety features to protect against overcharging, overvoltage, overtemp, etc. I highly recommend this item as a UPS system for a security camera, Raspberry Pi computer, or anything similar. The 3000ma battery is strong enough to keep your item powered up for quite a few hours; until main power returns.My only suggestion for those wanting to use it as a 5v USB UPS system, is to get a different 12vdc power pack/charger. The one that comes with it is 12vdc 500ma. That's 1/2 amp. That is fine for charging the internal batteries, but it may not be big enough to run your device and charge the batteries. My Wyze camera uses between 500-750ma. So, chances are, in time, the camera would use up the batteries faster than they can be recharged. If you put a 12vdc 1amp charger on it, the battery will always be topped off 100% and the camera will still be able to operated by the charger power (pass through) and not off of the batteries. FWIW: The larger 6000ma model by this company does have a 1amp charger/power pack; but it needs more to charge twice as many batteries. So either way, if you want to use it as a UPS, I recommend getting a different 12vdc charger/power pack. You probably have a bunch sitting around the house.But overall.... This is a GREAT device. I've only been using it for a few days, but it's great. The battery backup stays fully charged, my camera gets it's power from the 12vdc charger/power pack; but has the batteries there as a backup during power outage. The batteries aren't continually charging once full. The device is completely COLD to the touch which shows that the batteries are protected from being overcharged. This is a great device; especially for the price. And having a seller that is #1 in customer service is a plug. Talentcell is definitely going to be my go to for first options in related items in the future.

I bought this thing to serve as a battery backup (UPS) for my Raspberry Pi4. I live in the Phoenix area and we often lose power during bad thunderstorms. Last week, we had one of those storms and I did lose power, briefly. My Pi did not go down. The only down side I've found is I haven't figured out how to have it communicate with my Pi in case I lose power and it can tell the Pi when battery is getting low. This way I can get the Pi to shut down gracefully. Great device!It was either this for ~$25 or build one for ~$35-50. Easy choice

This battery pack is very small but carries a surprisingly long-lasting charge. It is a great value and is highly recommended. My only criticism is that it takes a long time to charge and a very minor criticism that the "full charge" status indicator (five lights) lasts a very short time until the indicator reduces to four lights. Regardless of the status indicator, the battery charge lasts a very long time. Again, this is a great battery.

Works great, very versatile, useful for a number of DIY projects.

The good news:> Solid and well-built, nothing flimsy about it> Contains good-quality Samsung 3000maH cells> 12v output is pretty good, though drops to 11.4v at the rated maximum of 3 amps> 5v USB output easily provides 2 Amps of charging current and is not finicky about the load*The bad news:> The charger can barely deliver half the rated output current, which means longer recharge times> (minor) The power switch can easily be turned on if the battery pack is packed in a suitcase or back-pack or bouncing around in the glove box. A recessed switch would prevent this from happening.The photos tell the story of the poor charger, which in my estimation would likely take 12-16 hours to fully recharge the battery. With no load the charger provides the rated 12.6 volts but as soon as the load is increased the voltage drops and is down to 12.0 volts at only .27 amps. The most current I could get out of the charger was .30 amps but the voltage was down to below 9.6v, way too low to charge a 3-cell li-ion battery pack. The photos in the instruction manual show using the charger to both charge the battery pack and power a roll of LEDs at the same time - my tests indicate this charger could not provide the current needed to do both.* Many USB power banks have overly-sensitive protection circuits that shut down the power if there is a current surge for even a tiny fraction of a second. This means they can't be used with electronic devices that have switch-mode power supplies or voltage boosters, such as several portable music players I use. Even though the average current draw may only be 1/4 amp, most of my power banks will not power them, even though they are rated between 2 and 2.4 amps. The Talentcell power bank has no trouble powering these loads.

So far, so good. I needed a very portable battery with 12-volt output for a telescope. This unit holds its charge well. It's nice that it includes the AC charger.

A good amount of power in a very compact package. I've used this to power both small and midsize telescope mounts and been very happy with it.

Lost the cord to my computer monitor during a move. This fit the bill! Works great!