expired
Romoss 30000mAh 30W Fast Charging Portable Power Bank
$26
$46
43% off
+ Free Shippingat Amazon
Missed This Deal? Get alerts when similar deals are posted.
+ Free Shippingat AmazonDeal Details
ROMOSS Direct via Amazon has Romoss 30000mAh 30W Fast Charging Portable Power Bank for $25.99 after clipping the $20 coupon on the product page. Shipping is free.
Note: Must be logged in to clip coupons; coupons are typically one-time use.
Thanks to Staff Member Bruinnn for posting this deal.
Features:
Note: Must be logged in to clip coupons; coupons are typically one-time use.
Thanks to Staff Member Bruinnn for posting this deal.
Features:
- QC30W & PD27W Rapid Charging
- 30000mAh High Capacity
- 3 Output Ports: 1xUSB-C Port and 2x USB-A ports
- 3 Input Ports: Micro USB, Lightning, Type-C ports
- Smart LED Indicator: Help you easy to track the battery power, current, and voltage.
- Fully recharge in less than 8 hours with an 18W wall charger(Not Included)
- What's included: 3000mAh Power Bank x 1, USB cable x 1. User manual x 1 & Free 12-month warranty.
Editor's Notes
Written by powerfuldoppler | Staff- About this product:
- Rating of 4.7 from over 3,600 Amazon customer reviews.
- About this store:
- ROMOSS Direct has a 4.8 score from over 2,600 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.
- Additional note:
- Please see original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
ROMOSS Direct via Amazon has Romoss 30000mAh 30W Fast Charging Portable Power Bank for $25.99 after clipping the $20 coupon on the product page. Shipping is free.
Note: Must be logged in to clip coupons; coupons are typically one-time use.
Thanks to Staff Member Bruinnn for posting this deal.
Features:
Note: Must be logged in to clip coupons; coupons are typically one-time use.
Thanks to Staff Member Bruinnn for posting this deal.
Features:
- QC30W & PD27W Rapid Charging
- 30000mAh High Capacity
- 3 Output Ports: 1xUSB-C Port and 2x USB-A ports
- 3 Input Ports: Micro USB, Lightning, Type-C ports
- Smart LED Indicator: Help you easy to track the battery power, current, and voltage.
- Fully recharge in less than 8 hours with an 18W wall charger(Not Included)
- What's included: 3000mAh Power Bank x 1, USB cable x 1. User manual x 1 & Free 12-month warranty.
Editor's Notes
Written by powerfuldoppler | Staff- About this product:
- Rating of 4.7 from over 3,600 Amazon customer reviews.
- About this store:
- ROMOSS Direct has a 4.8 score from over 2,600 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.
- Additional note:
- Please see original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
Community Voting
Deal
Score
+54
Good Deal
Bad Deal
Top Comments
Ever notice how when charging both the phone and the battery pack gets warm? That's because the battery pack has to boost the internal voltage to 5v (often upwards of 90% efficient, but never 100%) and your phone has to take that 5v and step it back down to the phone's internal battery voltage, with similar losses. If your phone was quick charging, the efficiency drops even more, but it's hard to quantify since there's a lot of variance.
And then there's the power your phone uses that's never delivered to the internal battery. Your phone was still on when it was charging yeah? Well that power came from the battery pack, and when phones are plugged in they turn off most power saving measures. How much power does that take? Well who knows, you have no way of directly measuring it by just glancing at (wildly inaccurate) capacity gauges.
If you want to accurately measure how much power a power bank delivers without just wholly making shit up, you have to get something that actually measures how much power was delivered [amazon.com]. That doesn't account for the internal losses in the battery pack circuitry, but it'll get you in the ballpark. Ideally you'd charge the pack from empty through that, save the result, then charge a load from the battery until the battery is flat, and the battery capacity will be roughly halfway between the two results. It's more work than just plugging in your phone, but just plugging in your phone is only slightly better than just taking a wild ass guess.
Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!
68 Comments
Sign up for a Slickdeals account to remove this ad.
I recently received the one I linked and will be sending it back as it drained too quickly recharging.
Our community has rated this post as helpful. If you agree, why not thank
I recently received the one I linked and will be sending it back as it drained too quickly recharging.
Our community has rated this post as helpful. If you agree, why not thank
Our community has rated this post as helpful. If you agree, why not thank
Sign up for a Slickdeals account to remove this ad.
Our community has rated this post as helpful. If you agree, why not thank
Thanks!
Our community has rated this post as helpful. If you agree, why not thank
I would also say this is one of the single best pieces of tech I have ever owned. The first one lasted from 2020 - 2024 before it started ballooning. The second one I just got. The first I absolutely abused. We are talking tossed in a bag, camping music festivals, Burning Man with the Alkaline dust, snowstorms, you name it.
I charge this in roughly 2 hours from 0 with a macbook pro charger, but you can charge with USBC, MicroUSB, and Lightning. It also works, unlike most batteries as pass through. So when I go away I often do not even bring a block, Just plug this into the wall, and plug the usb device in and press the button. This also means if you have more than one of these you can daisy chain them to charge all of them overnight.
This gets roughly 8 iphone X charges, 5 full Fold5 charges, 2 Ipad pro, and can even slowly trickle charge a macbook pro.
This is a no brainer, even for emergency power. Lowest i've ever bought it is $21 from Amazon. Worth every penny.
Finally, these go on sale all the time, but pair it with a pack of these
https://www.amazon.com/Basesailor...10
And you will never be without the correct charging port.
If you have not clicked checkout now you are doing a disservice to yourself.
Still after 4 years around 3
I don't think I have this exact model, but I think I have a much bigger capacity one and it has been fine so far. I don't use it heavily but it has survived not being used for a while and as far as I can tell, hasn't suffered greatly capacity-wise from not being used
Sign up for a Slickdeals account to remove this ad.
What the hey, in for one. Never know when I might need to kill a slightly larger elephant.
Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!