Talentcell Portable Power Bank NB7102, Multi Voltage Output Power Supply with DC & USB-C Port for Laptop, Smartphone, Camera

This is an excellent power bank. It holds a charge a very long time as described. Highly recommended product.

works great however be aware the battery size , will charge ur phone once before recharge

Very versatile portable power. Be careful, though, about the polarity of whatever you want to power. When I used this with a guitar pedal and the supplied battery connector, it would not work. When I installed a polarity-changing adapter on the cable, it worked. Given that, I've purchased two of the batteries. If you have one of the original Spark 40 amps, this battery will power it for 4 hours or more. You'll need the polarity changer though.

I purchased this pack to allow portability of my Positive Grid Spark guitar amplifier. The first pack I received either had defective cell(s) or a defective charge/analyze circuit. All led’s of the 4 step led charge indicator would illuminate when the pack was charging, but only 2 or 3 would illuminate when the charger was disconnected from the pack, even after 5 days of charging. Amazon did send out a replacement pack immediately. The new pack displayed a 75% charge upon arrival, I was worried, but after a few hours of charge time all 4 led’s illuminated as expected. I haven’t used the Spark for more than 2 or 3 hours at a time but so far the battery pack has worked great and the portability aspect is great. I’ll update the 3 star rating in a few months after more testing and use. I’m always leery of “unusually named” crappy Chinese lithium battery products and their very optimistic rated vs. actual capacity. Lol By the way, the magnetic phone mounts work great and far better than I expected as an option for mounting the battery. One year later…Replacement pack does not fully charge and dies after adding only 20% charge to my iPhone 14 Pro Max. I maybe have 15-20 hours of use with the Spark amp. Really disappointed. I’ll take it apart eventually and replace the cells. Update….Who cares……This pack, yep #2, is an absolute POS. I’ve made multiple attempts to reach the seller!!!😂😂😂😂 Who am I kidding. Great idea, but super crappy execution. I look forward to a proper, tear down and analysis! Ordinarily wouldn’t take the time but I’m almost irritated enough to add it to the list of projects!

I initially became aware of this battery 2 years ago , that it works perfectly for the Positive Grid "Spark 40" guitar practice and modelling amp. I like it so well, that i just bought a 2nd one that arrived today 9-14-25. This battery also works perfect for many devices with the supplied tips . I can only answer that the Talent battery pack works perfect on my Dell 13 inch Netbook perfectly. I am very pleased and it is a wonderful long lasting power source for my needs with the devices I use ( Dell 19 volt Laptop , and Spark 40 19 volt guitar amp ) VERY PLEASED AAAAAAA+++++++++

Bought this for a trip to Europe. I took lots of videos/pictures in Paris, London and Florence. Hooked my iPhone up to it and never ran out of juice on my iPhone. It's small enough I could hole my iPhone and power bank in one hand. Since coming home, I use it in combination with my single USB-C wire to charge several devices at the same time.

overall great product I even purchased a second battery because it works well and holds a long charge. the only downfall I have found and reason for 4 out of 5 stars is because it will not charge my Laptop ACER Zenbook Pro 15 OLED. The adaptor that will fit it is actually the HP adaptor however it glitches and doesn't have a secure adaption causing it to not work 98% of the time. Great product except the adaptors. Both batteries and adaptors have the same problem.

I used this battery to power my Spark 40 guitar amp, but it has quit taking a charge. Great while it lasted, but I expected a long life! I held off posting a review hoping it would come back to life, but no luck. Update: The manufacturer is sending me a replacement - I couldn't ask for better service. I'm changing my rating to 5 stars. Good company!

Dernièrement, un derecho a frappé ma région et pour la première fois de ma vie, l'électricité a été coupé pendant presque 36h. Heureusement que j'avais cette batterie. Elle a été bien utile. J'ai été en mesure de recharger mon téléphone, ma tablette, un haut-parleur Bluetooth et mes 2 paires d'écouteurs. Quand la batterie est complètement déchargée, il faut environ 3h pour la charger avec l'adaptateur fourni. Selon l'angle, l'indicateur de charge n'indique pas bien. Par exemple sur la photo on voit 3 dels allumées mais il faut regarder bien en face, en réalité seulement 2 sont allumées. Quand toutes les dels sont éteintes, il faut recharger rapidement car il ne reste plus beaucoup de courant. Une chose agaçante, quand les prises USB sont dans le bon sens, l'indicateur de charge se retrouve en dessus (voir photo). Pas très pratique. La charge rapide est parfaite. Mon téléphone Samsung A50 passe de 20% à 90% en environ 1h08. Mon ordi portable se recharge très bien aussi grâce aux connecteurs fournis. Bizarrement, il n'est pas nécessaire d'appuyer sur l'interrupteur pour avoir du courant sur la prise DC2, le courant est toujours présent. Mais il faut appuyer sur l'interrupteur pour avoir du courant sur les prises USB-C et USB-A. J'aurais préféré que cette batterie se recharge aussi par USB-C (pour la recharger dans une voiture par exemple) et qu'elle utilise un panneau LCD pour indiquer la charge en pourcentage. Il y a peu de batteries portables qui offre le 19,5 Volt, c'est pourquoi, j'ai choisi celle-ci. Donc un bon achat, reste à voir la fiabilité à long terme.

Using this in conjunction with a Spark40 guitar amp which makes it truly portable. Comes with the correct connector to plug directly into the amp from the 19.5 volt output. Battery life is excellent when using the amp. Also allows the amp to be used as a portable bluetooth speaker without requiring AC outlets. Comes with an enormous supply of adaptors. The advantage of purchasing the black (vs white) battery pack is the USB C output. This is a very versatile power pack.

I bought this to use with my Spark 40 where AC was not available. Works like a charm.

It will no longer charge. Left it for 24 hours. So, I likely won't get my money back either. But if I do receive a refund, I will post. If I don't post anything in the next 3-4 weeks. Well, you'll all at least know in advance, not to buy. The charging is great at the beginning, but then a few months later it took significantly longer to charge a simple cell phone.

Very good product, but the usb-c don’t work. I’m not sure if all of them are like that or l just got the bad batch. That’s the only problem so far.