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forum threadt0mmyr posted Apr 11, 2026 04:57 AM
forum threadt0mmyr posted Apr 11, 2026 04:57 AM

UDPOWER C400 Portable Power Station (256Wh LiFePO4, 400W) $135.99 Shipped

$136

$210

35% off
UDPOWER
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Pretty solid price on a compact power station + jump starter combo.

https://udpwr.com/products/udpowe...0794755262

Code RUD20

Highlights:

256Wh LiFePO4 battery (4000+ cycles) → much longer lifespan vs standard lithium

400W AC output / 800W surge → runs laptops, mini fridge, CPAP, etc.

Built-in 400A jump starter (cars, motorcycles, RVs)

Fast recharge: 0–80% in ~1.5 hrs (165W input)

Solar ready (up to 150W input)

Lightweight ~6–7 lbs, easy for travel
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Deal Details
Community Notes
About the Poster
Pretty solid price on a compact power station + jump starter combo.

https://udpwr.com/products/udpowe...0794755262

Code RUD20

Highlights:

256Wh LiFePO4 battery (4000+ cycles) → much longer lifespan vs standard lithium

400W AC output / 800W surge → runs laptops, mini fridge, CPAP, etc.

Built-in 400A jump starter (cars, motorcycles, RVs)

Fast recharge: 0–80% in ~1.5 hrs (165W input)

Solar ready (up to 150W input)

Lightweight ~6–7 lbs, easy for travel

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4 Comments

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Pro
Apr 11, 2026 08:40 PM
1,245 Posts
Joined Jul 2019
WoodSlayR
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Apr 11, 2026 08:40 PM
1,245 Posts

Our community has rated this post as helpful. If you agree, why not thank WoodSlayR

Sorry, but 50 cents per Wh is not a good price these days, especially for a newcomer (UDPOWER was founded in 2023) off-brand product. Another couple of important things to point out is, that to charge at the claimed hypercharge rating of 165 watts, you have to utilize the 65W USBC input along with 100W with the AC to DC adaptor at the same time for the claimed hypercharge rating of 165W, not to mention the AC-to-DC adaptor is a large old-school power-brick style adaptor. Lastly, the solar input, the 12v car input, and the AC adaptor input all use the same port so only one can be used at a time. You'll need to utilize the 65W USBC port and this port at the same time to achieve 165W of hypercharging. Terrible design IMO.
Last edited by WoodSlayR April 11, 2026 at 02:41 PM.
2
Apr 12, 2026 02:40 AM
442 Posts
Joined Sep 2016
DharmaBummed69Apr 12, 2026 02:40 AM
442 Posts
The C600 for $145 is a better deal.
Pro
Today 05:28 AM
1,245 Posts
Joined Jul 2019
WoodSlayR
Pro
Today 05:28 AM
1,245 Posts
Quote from DharmaBummed69 :
The C600 for $145 is a better deal.
Even better, the Oupes exodus 1500 for a little over double the cost but is 6 times the capacity, 4 times the output. 4 times the solar input and no adaptors or charging bricks needed.
Last edited by WoodSlayR April 13, 2026 at 10:33 PM.
Today 08:38 AM
1 Posts
Joined Jan 2022
OffGridFrankToday 08:38 AM
1 Posts
Quote from WoodSlayR :
Sorry, but 50 cents per Wh is not a good price these days, especially for a newcomer (UDPOWER was founded in 2023) off-brand product. Another couple of important things to point out is, that to charge at the claimed hypercharge rating of 165 watts, you have to utilize the 65W USBC input along with 100W with the AC to DC adaptor at the same time for the claimed hypercharge rating of 165W, not to mention the AC-to-DC adaptor is a large old-school power-brick style adaptor. Lastly, the solar input, the 12v car input, and the AC adaptor input all use the same port so only one can be used at a time. You'll need to utilize the 65W USBC port and this port at the same time to achieve 165W of hypercharging. Terrible design IMO.
I see where you're coming from, but I think some of this comes down to what kind of product the C400 is trying to be.
For a small unit like this, I don't think price per Wh tells the whole story. A lot of people buying a 256Wh model are looking more at portability, LiFePO4 battery chemistry, usable output, and charging flexibility than just raw battery capacity.
On the charging side, the 165W hypercharge claim doesn't seem misleading to me, because UDPOWER does make it clear that this speed is achieved by using the DC input together with the 65W USB-C input. It's fair to say you don't like that setup, but I wouldn't say it's hidden.
As for the shared input for solar, car charging, and the adapter, I agree that it's a compromise. At the same time, on a compact power station, that feels more like a space-saving design decision than a major flaw. Most people shopping in this size range probably aren't trying to use multiple DC charging methods at once very often.
I also understand the complaint about the power brick. That's probably the part of your criticism I agree with most. But overall, I think "terrible design" is a bit too strong. To me, it looks more like a compact unit with some clear trade-offs that will work for some users and not for others.

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