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Omars Portable Power Supply 146Wh $55.00

$55.00
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https://www.omars.com/products/ac...k-notebook


Omars Portable Power Supply 146Wh $55.00
https://www.omars.com/products/ac...k-notebook
Reg. price: $109.99
Pro. price: $55.00
50% off code: OMARSPOWER
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#2
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#3
For those who gauge these by mAh (which is pretty much everyone):

40200mAh
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#4
40200mAh@3.7v? I hate when they don list the capacity with proper specs, surely that rating isnt for 110v. If this had a 9v output for a fish finder I would probably grab one for the kayak.
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#5
Quote from KM1984
:
40200mAh@3.7v? I hate when they don list the capacity with proper specs, surely that rating isnt for 110v. If this had a 9v output for a fish finder I would probably grab one for the kayak.
Generally the 146wH is the battery rating and go with 80% for inverter losses to get 110v power output. EX. (146wH/20watts)*0.8= 5.8 hours run time

A slightly larger sized Jackery is available with a 12v dc outlet for 93 - Edit DEAD
https://slickdeals.net/f/14078087-jackery-portable-power-station-explorer-160-167wh-lithium-battery-solar-generator-solar-panel-optional-backup-power-supply-with-110v-100w-peak-150w-ac-outlet-93-5?v=1&src=SiteSearch
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Last edited by Kachu2142 May 25, 2020 at 12:31 PM.
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#6
Thanks guys, especially for all the info. I got one, looks versatile.
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#7
.....
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Last edited by legopacific May 25, 2020 at 01:39 PM.
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#8
Quote from KM1984
:
40200mAh@3.7v? I hate when they don list the capacity with proper specs, surely that rating isnt for 110v. If this had a 9v output for a fish finder I would probably grab one for the kayak.
Still missing the weight, and it won't be light ....
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#9
Quote from frollic
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Still missing the weight, and it won't be light ....
Amazon seems to say 3.09 lbs.
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#10
Not working for me. "HTTP Status Response - Unauthorized" when I try to pay.

EDIT: Worked with PayPal.
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Last edited by jaylom May 25, 2020 at 02:11 PM.
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#11
Quote from jaylom
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Not working for me. "HTTP Status Response - Unauthorized" when I try to pay.

EDIT: Worked with PayPal.
Glad you posted this. I tried a few times and my paypal did work. Sorta concerned that credit cards didnt work but that maybe closed for memorial day with his payment processor.
I tried amex, ( Same output)"HTTP Status Response - Unauthorized didnt try another in fear as i heard that some hackers do this to vacuum credit cards from frustrated buyers.
Paypal did work for me.
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#12
Looks like 12 LG 18650 cells at 3350mAh each cells if you believe the 40200mAh LG cells specs which I have no reason not to believe. Comes out to be $55/12 = $4.58 per cells which is OK IMO. I have seen those LG cells much cheaper at less $2 per cells for typical USB cellphone charger. This, however, does include the AC outlet at 90W max which can save some in certain situation, but the lack of PD charging inputs really defeats this pack because you have to have the AC brick with you to charge this up. My rating is this is not cheap enough to buy.
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#13
If you are looking for something bigger Rockpalls has a 280 Wh 12V for 160. https://www.amazon.com/dp/B07ZJBHFZN
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#14
Quote from Cecerious
:
For those who gauge these by mAh (which is pretty much everyone):

40200mAh
Watt hours are less prone to marketing gimmicks. Wh in not dependent on battery technology voltage like amps. Ah are not a unit of power. Do not use Ah as a power gauge.
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#15
Ran the numbers to see if the rating checks out:

Let's assume 18650 batteries with a typical 11.1 Wh capacity.

The DC input charges at 16.8v, divided by a li-ion charging voltage of 4.2V, comes out to 4. Now let's look at the claimed capacity - 146 Wh/11.1Wh = 13. So, a 4s3p pack.

It seems like it's actually 146 Wh.

With conversion losses, so you'd expect 124Wh ($0.44/Wh) of usable power for AC loads (DC-AC) or 88Wh ($0.63/Wh) for DC loads (DC-AC-DC), for a total of 60% effeciency 😱. This means for DC loads, this is equal to a 100Wh (27000mah) USB PD power bank (assuming 90% effeciency - DC-DC is pretty efficient), which usually goes for $60.

So is it worth it? If you're willing to carry 2 extra lbs and your devices don't take USB-PD, it could be worthwhile. The closest competitor I found was Jackery would have about 150Wh of usable power for $110, which is $0.73/Wh, which weighs an additional pound.
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Last edited by bentrinh May 25, 2020 at 11:30 PM.
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