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expired Posted by Red_Liz | Staff • Sep 21, 2023
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expired Posted by Red_Liz | Staff • Sep 21, 2023

Baseus PD 20W 10,000mAh Portable Charger (Black)

$13

$20

35% off
Amazon
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Deal Details
Update: This popular deal is still available

Baseus US Flagship via Amazon has Baseus PD 20W 10,000mAh Portable Charger (Black) for $19.99 - 35% w/ clipped coupon = $12.99. Shipping is free w/ Prime or on $25+ or $35+ orders (minimum requirement varies by location).
  • Note: Must be logged in to clip coupons; coupons are typically one-time use.
Thanks to Staff Member Red_Liz for posting this deal.

Includes:
  • 1x Baseus 20W Power Bank
  • 1x 30cm USB A to USB C cable
Features:
  • USB C: 18w input, 20w output
  • USB A: 18w output
  • Micro: 18w input
  • Simultaneous charging (max 12W total power output while charging via 2 ports)
  • Power bank fully charges in under 3 hours

Editor's Notes

Written by citan359 | Staff
  • About this product:
    • Rating of 4.5 from over 9,000 Amazon customer reviews.
  • About this store:
    • Merchant Baseus US Flagship has earned a 98% positive lifetime rating (2,100 total ratings)
    • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
    • If you're not a student, there's also a free 1-Month Amazon Prime trial available.
    • You can also earn cash back rewards on Amazon and Whole Foods purchases with the Amazon Prime Visa credit card. Read our review to see if it's the right card for you.
  • Additional note:

Original Post

Written by Red_Liz | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Update: This popular deal is still available

Baseus US Flagship via Amazon has Baseus PD 20W 10,000mAh Portable Charger (Black) for $19.99 - 35% w/ clipped coupon = $12.99. Shipping is free w/ Prime or on $25+ or $35+ orders (minimum requirement varies by location).
  • Note: Must be logged in to clip coupons; coupons are typically one-time use.
Thanks to Staff Member Red_Liz for posting this deal.

Includes:
  • 1x Baseus 20W Power Bank
  • 1x 30cm USB A to USB C cable
Features:
  • USB C: 18w input, 20w output
  • USB A: 18w output
  • Micro: 18w input
  • Simultaneous charging (max 12W total power output while charging via 2 ports)
  • Power bank fully charges in under 3 hours

Editor's Notes

Written by citan359 | Staff
  • About this product:
    • Rating of 4.5 from over 9,000 Amazon customer reviews.
  • About this store:
    • Merchant Baseus US Flagship has earned a 98% positive lifetime rating (2,100 total ratings)
    • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
    • If you're not a student, there's also a free 1-Month Amazon Prime trial available.
    • You can also earn cash back rewards on Amazon and Whole Foods purchases with the Amazon Prime Visa credit card. Read our review to see if it's the right card for you.
  • Additional note:

Original Post

Written by Red_Liz | Staff

Community Voting

Deal Score
+100
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Top Comments

B1G_Mac
The batteries in all these power banks are 3.7V, but USB charging occurs at 5V. This means that every 10000 mAh battery pack has a usable maximum of 7400 mAh (10000 / 5 * 3.7). Then charging inherently incurs efficiency losses – about 20% on average – meaning you can expect the final (or "rated") capacity of pretty much all 10000 mAh battery packs to be around 5920 mAh (7400 * 80%) – though some are more or less efficient than others.

Not entirely sure that pertains to what you were seeing, but hopefully it helps!
bppcomplete
I only got 26.55 Wh out of this in my initial test ([email protected] discharge, which, uh, is also less than the rated 20W; it can however do [email protected]).

It's labeled for ≥ 75% efficiency and ≥ 37 Wh, so it's either < 72% efficiency or < 37 Wh, either of which violates the text on the unit itself. I'm charging it back up now to see if we can wheedle out which it is, but this isn't a great first impression and I'm probably returning it.

edit: charging it back up at 5V@2A cost 39.3 Wh. I got 31.6 Wh discharging at [email protected]. So it seems like the efficiency is just bad.

edit 2025-03-01: this thing is just trash now. I don't know why I didn't return it. I can barely get half of these numbers out of it now.
barrera_j
Another Slickdeals Staff posting about this company....

112 Comments

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Sep 28, 2023
6,776 Posts
Joined Jul 2011
Sep 28, 2023
08CivicSi
Sep 28, 2023
6,776 Posts
Quote from thefarcus :
so which brand or style is good for max efficiency
I got one from Monoprice and it has been good for me...never tested the actual output but it seems to hold up to it.
1
Sep 28, 2023
1,111 Posts
Joined Apr 2008

This comment has been rated as unhelpful by Slickdeals users.

Sep 28, 2023
893 Posts
Joined Dec 2007
Sep 28, 2023
ghettoroadster
Sep 28, 2023
893 Posts
damn, baseus is really taking over aukey, hasn't it.
Sep 28, 2023
149 Posts
Joined Nov 2010
Sep 28, 2023
TravelTom79
Sep 28, 2023
149 Posts
Quote from ghettoroadster :
damn, baseus is really taking over aukey, hasn't it.
But are they good?
Sep 28, 2023
1,113 Posts
Joined Nov 2010
Sep 28, 2023
penner42
Sep 28, 2023
1,113 Posts
I have this one, and it's fine. Don't bother verifying the actual capacity, but it works well enough for me.

Not gonna get another because I want dual USB-C input and output and to completely dump the micro-USB port. I wanna be able to plus in the powerbank with a USB-C cable AND charge another device from it with a USB-C to USB-C cable. That only seems possible on larger capacity power banks for the moment.
Sep 28, 2023
513 Posts
Joined Oct 2007
Sep 28, 2023
kpeng2
Sep 28, 2023
513 Posts
Quote from Joybulb :
10k isn't great, spend a few more bucks for 20k
20k is too heavy to carry around, I think 10k is the perfect size.
Sep 28, 2023
513 Posts
Joined Oct 2007
Sep 28, 2023
kpeng2
Sep 28, 2023
513 Posts
Quote from TravelTom79 :
But are they good?
aukey is good.
1

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Sep 28, 2023
143 Posts
Joined Aug 2011
Sep 28, 2023
GiSS88
Sep 28, 2023
143 Posts
Quote from dwyerkg :
I just returned this as it was not compatible with my Samsung S23 ultra
Can you elaborate as to what about it wasn't compatible?
Sep 28, 2023
216 Posts
Joined Oct 2006
Sep 28, 2023
farfromuman
Sep 28, 2023
216 Posts

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

Did some testing on the one I just got using FNB58
Charging the power bank 0-100% - 8680mAh 42.95Wh
Discharging the power bank 100-0% at 5V 17W using resistor pack I got 5435mAh 27.61Wh
During the discharge at 17W the power bank got hot so the power conversion is not very efficient and some of the capacity dissipated as heat. I will do another test at 11W.

UPDATE
I did a test at 11W and got 5984mAh, I will be keeping it since that is in the acceptable range.

Compare this to my 6 year old 10000mAh Anker slim bank
Charging the power bank 0-100% - 6966mAh 34.45Wh
Discharging the power bank 100-0% at 5V 11W using resistor pack I got 4810mAh 24.28Wh
Last edited by farfromuman October 1, 2023 at 09:47 AM.
2
Sep 28, 2023
2,539 Posts
Joined Feb 2007
Sep 28, 2023
cdog90260
Sep 28, 2023
2,539 Posts
I thought this was a better deal, slightly apples/oranges, but a 26800 power bank, max airline limit, $12 with clippable coupon:

https://www.amazon.com/dp/B0CBS31...ct_details
1
Sep 28, 2023
1,162 Posts
Joined Nov 2019
Sep 28, 2023
slickd888
Sep 28, 2023
1,162 Posts
Picked up one of these for around $15 for for traveling to Japan etc this summer and it's good for that purpose. It charges quickly and enough capacity for two phones plus light enough to carry in a backpack for walking around all day.
Not sure about longivity but so far it's holding up. No complaints.
Sep 28, 2023
227 Posts
Joined Jul 2017
Sep 28, 2023
sbs5130
Sep 28, 2023
227 Posts
Quote from cdog90260 :
I thought this was a better deal, slightly apples/oranges, but a 26800 power bank, max airline limit, $12 with clippable coupon:

https://www.amazon.com/dp/B0CBS31...ct_details
Price seems too good to be true. All of the reviews are "sponsored." Hard pass for me.
2
Sep 28, 2023
501 Posts
Joined Apr 2013
Sep 28, 2023
arr_sea
Sep 28, 2023
501 Posts
Quote from JoeyJ2133 :
Anker Portable Charger, Power Bank, 10K Battery Pack with High-Speed PowerIQ Charging Technology and USB-C (Input Only) for iPhone 15/15 Plus/15 Pro/15 Pro Max, iPhone 14/13 Series, Samsung Galaxy https://a.co/d/j5bt4bx
40% off
For what it's worth, this Anker one is about 30% lighter, which is a factor for backpacking, etc. I see a price of $12.59 after coupon.
1
Sep 28, 2023
285 Posts
Joined Aug 2011
Sep 28, 2023
JR007
Sep 28, 2023
285 Posts
Quote from sbs5130 :
Price seems too good to be true. All of the reviews are "sponsored." Hard pass for me.
I was considering this one was and noticed the same situation. Hard pass, as there's no actual purchases. Will look at Anker.
1

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Pro
Sep 29, 2023
1,907 Posts
Joined Oct 2014
Sep 29, 2023
MtnXfreeride
Pro
Sep 29, 2023
1,907 Posts
Quote from B1G_Mac :
The batteries in all these power banks are 3.7V, but USB charging occurs at 5V. This means that every 10000 mAh battery pack has a usable maximum of 7400 mAh (10000 / 5 * 3.7). Then charging inherently incurs efficiency losses – about 20% on average – meaning you can expect the final (or "rated") capacity of pretty much all 10000 mAh battery packs to be around 5920 mAh (7400 * 80%) – though some are more or less efficient than others.

Not entirely sure that pertains to what you were seeing, but hopefully it helps!
Whats the voltage of a typical phone battery? I thought most were 3.7 volts nominal.

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