Customers are enthusiastic about the Ultimate Lithium 10,000mAh power bank's long-lasting battery life and ease of use. Many appreciate its convenient size and the high quality of its construction, along with its compatibility with various devices via multiple USB ports and USB-C connectivity. However, some customers noted that the device is relatively heavy.
This summary was generated by AI based on customer reviews.
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 5 Showing 81-100 of 896 reviews
Pros mentioned:
Battery life, Size
Rated 4 out of 5 stars
Great product
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Posted . Owned for 3 weeks when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Great slim and compact easy to carry around
Holds charge good
I would recommend this to a friend
Pros mentioned:
Battery life
Rated 5 out of 5 stars
Works As Advertised
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Posted . Owned for 1 week when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
The Energizer name brand gave me a level of comfort when buying this item. So far it has lived up to expectations. I can charge my iPhone 13 up-to 4 times on a single charge of this system.
I would recommend this to a friend
Cons mentioned:
Weight
Rated 5 out of 5 stars
GOOD POWER BUT A LITTLE HEAVY
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Posted . Owned for 11 months when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
It is a little heavy but I'm able to charge multiple phones throughout the day. Was great to have on a high school senior trip to an amusement park. I got this one specifically because it has the USB-C port.
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Pros mentioned:
Battery life
Rated 5 out of 5 stars
Excellent capacity and longevity
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Posted . Owned for 1 week when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Has a high capacity and can charge via USB C or micro USB. Charging the battery itself is 15 watts. It has an output of 18 watts at most. I wish it charged itself at a higher rate as some phones charge at 25 or 45 watts.
I would recommend this to a friend
Pros mentioned:
Battery life
Rated 5 out of 5 stars
Big battery
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Posted . Owned for 1 month when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
I carry this in my work backpack and use it here and there- it provides a lot of battery power. I think I’ve had it for over a month, and I used it on a trip recently exclusively to charge my phone, watch, and AirPods for multiple days- and I’ve only ever charged this device twice.
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Pros mentioned:
Battery life, Charging speed
Rated 4 out of 5 stars
Bang for the buck
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Posted . Owned for 1 month when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Pretty solid charger that is consistently on sale.
I would recommend this to a friend
Pros mentioned:
Battery life
Rated 5 out of 5 stars
Worked well for me
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Posted . Owned for 1 month when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
I have had awhile to use this. I got it just before I went on a two-day trip, and it kept my iPhone 14 ProMax charged. I've had a couple of other power banks that worked well enough, but this one seems to be really good.
I would recommend this to a friend
Pros mentioned:
Battery life
Rated 5 out of 5 stars
Great Battery
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Posted . Owned for 3 months when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Love this battery pack. My sister used my battery pack every day while on vacation. This battery pack was so useful that my other sister purchased one when we returned from vacation.
I would recommend this to a friend
Pros mentioned:
Battery life
Rated 5 out of 5 stars
Power on the go!!!
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Posted . Owned for 1 week when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Works great!
Allows you to source power when you are away from electrical power sources.
Great for travel scenarios and when in remote areas.Also a good value for on the go power alternatives. It was a life saver for me while on vacation and on the go.
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Pros mentioned:
Ease of use
Rated 5 out of 5 stars
Emergency backup
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Posted . Owned for 1 year when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
This product is easy to use and reasonable in cost. It is helpful when Milwaukee has a prolonged power outage, which has been a problem in 2023.
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Rated 4 out of 5 stars
Good, but seems to drain fast
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Posted . Owned for 1 week when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Works great for all the devices I've tried so far (tablet, phone, earbuds). It doesn't quite seem like 10,000mAh though since it discharged faster that expected and faster than my other 10,000mAh battery. But the usb-C connection is the reason I bought it and it's adequate for what I need.
I would recommend this to a friend
Pros mentioned:
Battery life, Ease of use
Rated 4 out of 5 stars
Good Product
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Posted . Owned for 1 month when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Charged my phone 4 times in s single charge. Easy to use.
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Pros mentioned:
Battery life
Rated 5 out of 5 stars
Energizer - Ultimate Lithium 20,000mAh 18W Fast C
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Posted . Owned for 4 months when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
First time trying this brand and i really recommend it! Bought two of this kind actually, was looking to replace my old one and this was perfect. Works really well and lasts all day. Definitely worth it and will bring it with me everywhere.
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Pros mentioned:
Ease of use
Rated 5 out of 5 stars
Peace of Mind
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Posted . Owned for 8 months when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Bought this at suggestion of a friend to ensure my phone was charged up for processing credit card payments at an art fair. Best purchase I’ve made recently! Simple and easy to use. Great yo use when traveling, too.
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Pros mentioned:
Battery life
Rated 5 out of 5 stars
Does the Job
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Posted . Owned for 1 week when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
This thing does everything i need it to recharge or keep a charge. Its bulky but good for those emergency needs when the power goes out. Mine i use with others just for standby. Occasionally i would be lazy and have it with me on the couch. Lol
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Pros mentioned:
Battery life
Rated 5 out of 5 stars
Worked when we needed it.
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Posted . Owned for 3 weeks when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Coincidentally the power went out about two weeks or so after purchasing for about 8 hours. Phones conveniently were about to die. This charged up muktiple phones to 100% in a little over an hour and and still showed 75% full itself.
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Pros mentioned:
Charging speed
Cons mentioned:
Weight
Rated 4 out of 5 stars
Great charger, one minor nitpick
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Posted . Owned for 1 week when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Great charger. Heavy but I don’t really mind. Only thing I’d like is an indicator light that it’s charging. It’s got indicators for how charged the battery is when you charge it, but when you charge something FROM it; you can’t easily tell if it started charging without the device being charged telling you so. It’s fine for phones and such but some things that I want to charge (camera gear, audio recorders,etc) from it don’t have a screen to see if it’s being charged, and you just have to trust it. Pretty minor nitpick but it’d be nice to have an indicator when it’s charging something.
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Pros mentioned:
Battery life
Rated 5 out of 5 stars
Fantastic power supply
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Posted . Owned for 1 month when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Runs for hours on end without breaking a swear. Ive used it for phone charging and running an electric heated jacket and it works wonders for both. The multitude of ports on it is a nice touch too.
This review is from Energizer - Ultimate Lithium 20,000mAh 18W Fast Charge Portable Charger/Power Bank QC 3.0 & PD 3.0 for Apple, Android & USB Devices - Gray
I would recommend this to a friend
Pros mentioned:
Charging speed
Rated 5 out of 5 stars
Works great
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Posted . Owned for 5 months when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Excellent charger. I normally charge this while at home, so I can keep my phone charged while I am on the go. If I use the phone to record events, I keep it plugged into this charger to prolong my recording time.
I would recommend this to a friend
Pros mentioned:
Ease of use
Rated 5 out of 5 stars
Best Battery Pack
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Posted . Owned for 3 weeks when reviewed.
This reviewer received promo considerations or sweepstakes entry for writing a review.
Use it for traveling to football games or out and about. It has become a super handy tool that I use all the time to make sure I am always charged up!