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forum threadpennysave posted Jan 16, 2026 12:58 PM
forum threadpennysave posted Jan 16, 2026 12:58 PM

$18*:GENDOME Portable Charger 15000mAh – LiFePO4, QC3.0 & PD3.0 Fast Charging, Built-in USB-C Cable, Travel Power Bank

$18

$26

30% off
Amazon
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Amazon.com has GENDOME Portable Charger LiFePO4 Battery, QC3.0 & PD3.0 22.5W Fast Charging, 15000mAh Portable Power Bank Built in USB C Cable, Travel Essential Backup Battery with USB-C in/Output on sale for $18. Shipping is free with Prime or on $35+ orders.

About this item
  • Superior Safety LiFePO4 Battery: The World's FIRST and ONLY advanced LiFePo4 battery on power bank, the same type used in Electric Vehicles, ensuring exceptional safety and reliability. With 3000 charge and discharge life cycles, it offers 10 years of durable performance.
  • Fast Charging & High Capacity: QC3.0 and PD3.0 fast charging boost your charging speed up to 22.5W. Large battery capacity 15000mAh (3.2V/48Wh) charge your phone up to 3 times, making it perfect for extended use on the go. Rated capacity 8000mAh (5V/3A). 15000mAh at 3.2V (= 8000mAh at 5V).
  • Supports Wireless Charging for Apple Watch: skip the extra charger and save space during business trips or travel.
  • Dual Charging Options (Solar/USB): Charge via solar panel or USBcable-perfect for outdoor adventures, travel, and camping. Stay powered up no matter where you are and Go Green.
  • Universal Compatibility: Equipped with a USB-C input/output port, extra USB-C output port, a USB-A port, and a dedicated wireless charging pad for Apple Watch. A one stop solution for your charging needs. Tip: Fully charge GENDOME Micro30 power bank before first use.
  • Certifications for Power Banks: FCC, CCC, CE, UL, UN, RoHS and so on​

https://www.amazon.com/dp/B0DWXJS5X2
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About the Poster
Amazon.com has GENDOME Portable Charger LiFePO4 Battery, QC3.0 & PD3.0 22.5W Fast Charging, 15000mAh Portable Power Bank Built in USB C Cable, Travel Essential Backup Battery with USB-C in/Output on sale for $18. Shipping is free with Prime or on $35+ orders.

About this item
  • Superior Safety LiFePO4 Battery: The World's FIRST and ONLY advanced LiFePo4 battery on power bank, the same type used in Electric Vehicles, ensuring exceptional safety and reliability. With 3000 charge and discharge life cycles, it offers 10 years of durable performance.
  • Fast Charging & High Capacity: QC3.0 and PD3.0 fast charging boost your charging speed up to 22.5W. Large battery capacity 15000mAh (3.2V/48Wh) charge your phone up to 3 times, making it perfect for extended use on the go. Rated capacity 8000mAh (5V/3A). 15000mAh at 3.2V (= 8000mAh at 5V).
  • Supports Wireless Charging for Apple Watch: skip the extra charger and save space during business trips or travel.
  • Dual Charging Options (Solar/USB): Charge via solar panel or USBcable-perfect for outdoor adventures, travel, and camping. Stay powered up no matter where you are and Go Green.
  • Universal Compatibility: Equipped with a USB-C input/output port, extra USB-C output port, a USB-A port, and a dedicated wireless charging pad for Apple Watch. A one stop solution for your charging needs. Tip: Fully charge GENDOME Micro30 power bank before first use.
  • Certifications for Power Banks: FCC, CCC, CE, UL, UN, RoHS and so on​

https://www.amazon.com/dp/B0DWXJS5X2

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Model: GENDOME Portable Charger LiFePO4 Battery, QC3.0 & PD3.0 22.5W Fast Charging, 15000mAh Portable Power Bank Built in USB C Cable, Travel Essential Backup Battery with USB-C in/Output

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18 Comments

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Jan 16, 2026 06:41 PM
16 Posts
Joined Nov 2019
fhng11214Jan 16, 2026 06:41 PM
16 Posts
thanks
Jan 16, 2026 10:50 PM
9,768 Posts
Joined Nov 2013
AdelleyJan 16, 2026 10:50 PM
9,768 Posts
Kinda cool it's built like a tower and doesn't take up much foot print.

Lol but at the same time the thing is going to wake some people up when it falls over.

Maybe they could have designed some kind of folding base to make it wider at the bottom.
Jan 17, 2026 04:29 AM
630 Posts
Joined Mar 2009
StrategyFreakJan 17, 2026 04:29 AM
630 Posts
Looks like the first mass market LFP power bank (not a larger power station) on Amazon. Power banks actually tend to get lots of charge cycles if used daily so I'm very intrigued by how this product turns out. I might buy one just out of curiosity. Shame it only has the four dots to indicate charge state instead of a percentage
Jan 17, 2026 03:16 PM
9 Posts
Joined Feb 2015
Lix333Jan 17, 2026 03:16 PM
9 Posts
Interesting to see LFP batteries in portable chargers. However, I have many chargers I've been using for years and have noticed minimal decay. Also, all the newer ones are 45W output. Either way I'm interested to see where it goes from here.
Honestly, my biggest complaint is that they have always been marketed by mAh instead of Wh, especially now with the voltage difference. It's not a huge difference, probably just me being fussy 🤷
Jan 17, 2026 08:53 PM
62 Posts
Joined Nov 2022
ChainsawManJan 17, 2026 08:53 PM
62 Posts
LFP batteries are the future before solid state batteries are mainstream in 15-30+ years. They don't degrade easily like lithium ion batteries. Keeping lithium ion batteries at 100% or 0% farks up the battery capacity but lithium iron phosphate doesnt have that problem (nor does solid state). That's wy if you're not going to use a lithium ion battery keeping it around 70% charge turn it off then to slowly discharge down to 20% is a good bang/buck for long term capacity. Even that quack Musk is getting lithium iron phosphate batteries in a lot of models now. Standard range is lithium iron phosphate but long range is lithium ion. Roughly speaking, modern LFP cells are about 140 to 180 watt-hours per kilogram. Nickel-rich lithium ion cells are more like 230 to 300 watt-hours per kilogram at the cell level, sometimes higher in best cases.
"LFP has excellent cycle life and thermal stability. It tolerates full 100 percent charge daily with far less degradation. It is far less prone to thermal runaway. It uses no nickel or cobalt, so it is cheaper, more geopolitically stable, and more scalable. That is why Tesla, BYD, and others use LFP for standard-range models, fleet vehicles, taxis, delivery vans, and grid storage. If the target is 250 to 300 miles and cost matters more than absolute range, LFP is objectively better."
Jan 19, 2026 03:42 AM
49 Posts
Joined Aug 2014
TenfoldSystemsJan 19, 2026 03:42 AM
49 Posts
Same manufacture has their 36w solar panel on sale for $20.

https://a.co/d/0ihKIbK
Jan 19, 2026 06:33 AM
2,548 Posts
Joined Apr 2011
LobbymonsterJan 19, 2026 06:33 AM
2,548 Posts
Quote from TenfoldSystems :
Same manufacture has their 36w solar panel on sale for $20.

https://a.co/d/0ihKIbK
I have this and the power bank. It charges slowly and I can't seem to get greater than 5V and roughly 1.3A from this solar panel. (I used a USB energy reader.) I'm currently wondering how to connect two of these panels in parallel to charge it faster.

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Jan 19, 2026 06:33 PM
49 Posts
Joined Aug 2014
TenfoldSystemsJan 19, 2026 06:33 PM
49 Posts
Quote from Lobbymonster :
I have this and the power bank. It charges slowly and I can't seem to get greater than 5V and roughly 1.3A from this solar panel. (I used a USB energy reader.) I'm currently wondering how to connect two of these panels in parallel to charge it faster.
Solar generation is going to depend heavily on the area you live. I just ordered a second panel, type-c splitter, and usb energy meter to test with. Should be able to use the USB Y splitter to combine two inputs.
Jan 19, 2026 08:34 PM
2,548 Posts
Joined Apr 2011
LobbymonsterJan 19, 2026 08:34 PM
2,548 Posts
Quote from TenfoldSystems :
Solar generation is going to depend heavily on the area you live. I just ordered a second panel, type-c splitter, and usb energy meter to test with. Should be able to use the USB Y splitter to combine two inputs.
I'd like to try that as well. Would you mind sharing which Type-C splitter you're planning to use? The ones I find are uni-directional. (Eg. Only 1 input goes to 2 outputs instead of 2 inputs to 1 output.)
Jan 19, 2026 09:37 PM
49 Posts
Joined Aug 2014
TenfoldSystemsJan 19, 2026 09:37 PM
49 Posts
Quote from Lobbymonster :
I'd like to try that as well. Would you mind sharing which Type-C splitter you're planning to use? The ones I find are uni-directional. (Eg. Only 1 input goes to 2 outputs instead of 2 inputs to 1 output.)
That's a great point as I assumed the y splitters would work like a solar Y splitter but they are one directional from 1 into 2. What I'm going to do is get some blocking diodes and then cut a couple spare USB-C cables. Wire in the diodes to the positive of each panel and combine to one USB-C out. This will keep current from flowing between panels if one becomes shaded and combine the amps.
Jan 19, 2026 09:55 PM
2,548 Posts
Joined Apr 2011
LobbymonsterJan 19, 2026 09:55 PM
2,548 Posts
Quote from TenfoldSystems :
That's a great point as I assumed the y splitters would work like a solar Y splitter but they are one directional from 1 into 2. What I'm going to do is get some blocking diodes and then cut a couple spare USB-C cables. Wire in the diodes to the positive of each panel and combine to one USB-C out. This will keep current from flowing between panels if one becomes shaded and combine the amps.
That could work. I appreciate your thoughts on this. I'd be interested in seeing the details/results if you ever decide to share your project.
Jan 20, 2026 09:53 AM
2 Posts
Joined Jul 2022
FabulousGorilla4790Jan 20, 2026 09:53 AM
2 Posts
Expired
Jan 22, 2026 02:57 AM
1 Posts
Joined Jun 2024
FaithfulCorn225Jan 22, 2026 02:57 AM
1 Posts
It's $25
Jan 23, 2026 03:26 PM
49 Posts
Joined Aug 2014
TenfoldSystemsJan 23, 2026 03:26 PM
49 Posts
Quote from Lobbymonster :
That could work. I appreciate your thoughts on this. I'd be interested in seeing the details/results if you ever decide to share your project.
Out of curiosity, do you use the USB-C to USB-A adaptor that came with it? I got my USB power tester and found if you use that adaptor, it limits to 5v. Without the adapter I'm getting 12v.

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Jan 23, 2026 08:40 PM
2,548 Posts
Joined Apr 2011
LobbymonsterJan 23, 2026 08:40 PM
2,548 Posts
Quote from TenfoldSystems :
Out of curiosity, do you use the USB-C to USB-A adaptor that came with it? I got my USB power tester and found if you use that adaptor, it limits to 5v. Without the adapter I'm getting 12v.
That's interesting. Let me try it when it's sunny again and I'll report back. Thanks!

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