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Description
The SolidSafe 5K is a 5,000mAh power bank engineered to reduce fire risk. Semi-solid-state battery cells contain a fraction of the flammable liquid found in conventional lithium-ion, designed to resist the thermal failures that cause batteries to ignite. That's why power banks get recalled. That's why airlines restrict them. This solves it. Qi2 magnetic wireless charging, 20W fast charging, full-color LCD display, built-in cable. One full phone charge in a form factor slim enough to forget it's there.
Solid-State Cell Design Semi-solid-state chemistry cuts flammable liquid to a fraction of conventional lithium-ion, resulting in more stable charging and lower fire risk.
Tested for Safety In internal testing, SolidSafe cells have been drilled, cut, and punctured while fully charged, with no fire or thermal runaway. Traditional lithium-ion ignites instantly in the same tests.
Qi2 Certified 15W Magnetic Charging Locks onto Qi2 and MagSafe-compatible phones with a perfect magnetic snap. Delivers up to 15W fast wireless charging for iPhone 12-17 series, Pixel 10 series, and select Android device.
20W USB-C Fast Charging Fast, efficient wired charging for phones and small tablets with USB-C Power Delivery. Recharges to 80% in about an hour with any 20W+ charger.
Full-Color LCD Display A bright, easy-to-read screen shows real-time battery percentage and charging wattage, so you always know how fast it's charging and how much power is left.
Built-In Lanyard Cable The integrated USB-C cable doubles as a carry strap. Plug in for faster, more efficient charging than wireless, or use it to recharge the power bank itself.
Charge Two Devices at Once Power your phone and another device simultaneously using USB-C and Qi2 wireless together.
Pass-Through Charging Charge your phone while recharging the power bank at the same time through USB-C Power Delivery. Stay powered without waiting.
Airplane Mode A dedicated travel-ready state that places the battery in controlled mode for safer flights and storage.
TSA Ready Under 100Wh -- within FAA carry-on rules.
2-Year Warranty Built to last. Covered if it doesn't.
heybmx.com ships to the United States and Canada only.
SolidSafe 5K
Built safer. Built smarter.
Semi-solid-state cells, a live LCD readout, Qi2 wireless, and a built-in USB-C cable in one 5K power bank.
USB-C Lanyard
Lanyard cable.
No extra cord.
Full-color LCD
See every charge.
Battery percent. Live watts.
Qi2 Wireless
Snaps on.
Magnetic charging.
Semi-solid-state
Safer battery cells.
Reduced liquid electrolyte.
Four finishes
Pick your finish.
Black. Blue. Orange. Silver.
Simultaneous
Charge 2
USB-C + Qi2.
Wired output
20W USB-C
Fast wired output.
Daily power
5,000 mAh
A full phone charge.
Aluminum body
Dissipates heat.
Clean, durable enclosure.
Travel
Carry-on friendly.
Under 100Wh.
In the press
Built different. Reviewed that way.
"It could be a game changer for smartphones."
"Now lithium-ion feels outdated."
"Charging speeds are consistent, the display adds real usability."
"Doing something no other major player is currently doing."
Semi-solid-state
Built different from the inside.
SolidSafe uses semi-solid-state cells with significantly less liquid electrolyte than conventional lithium-ion. Less liquid means less fuel for the failures behind battery fires.
Full-color LCD
See what is left.
The LCD shows battery percentage and live charging wattage, so you know when to top up and how fast each device is charging.
Qi2 magnetic
Snaps on. Charges fast.
Qi2 gives you 15W magnetic wireless charging when you do not want to plug in. The alignment is automatic, so the phone lands where it should.
Built-in USB-C
The cable is already there.
The USB-C lanyard stays with the bank for wired charging or refilling the pack. No separate cable hunt.
CNC aluminum
Aluminum that helps with heat.
The CNC aluminum body feels solid in hand and helps spread heat during charging. It is a cleaner build than the plastic shells common in this tier.
9TO5MAC TEST
Put through the kind of test most power banks avoid.
9to5Mac put SolidSafe through a hands-on abuse test and showed the pack continuing to charge afterward. No mystery quote needed, just the proof on video.
Details
Product details, in plain English.
The quick receipt: 5,000mAh daily backup power, Qi2 magnetic wireless, LCD readout, built-in cable, and semi-solid-state cells.
Semi-solid-state cellsSignificantly less liquid electrolyte than conventional lithium-ion, which helps reduce fire risk.
5,000mAhSlim daily backup power for commutes, flights, nights out, and low-battery moments.
Qi2 + USB-CSnap on magnetically or plug in with the built-in USB-C lanyard cable.
20W USB-C outputFast wired output for phones and small USB-C devices. Refill the bank at up to 15W.
Full-color LCDSee battery percentage and live charging wattage instead of guessing.
Built-in lanyard cableThe USB-C strap stays with the bank for wired charging or recharging the pack.
Specs
Product specifications
The researcher track. Exact capacity, output, size, ports, and what comes in the box.
Capacity
5,000mAh
Under the 100Wh carry-on battery limit.
Battery
Semi-solid-state cells with significantly less liquid electrolyte
Wireless
Qi2 magnetic wireless charging, up to 15W
USB-C output
USB-C Power Delivery, up to 20W
USB-C input
15W max input
Devices
2 at once: USB-C plus Qi2 wireless
Display
Full-color LCD with battery percentage and charging wattage
Size
102.7 x 72.7 x 11.7 mm
Charging modes
Pass-through charging and Airplane Mode
In the box
SolidSafe 5K power bank and 60W USB-C cable
Warranty
2-year limited warranty
Quick answers
Questions, answered quickly.
The practical stuff: capacity, flying, device fit, safety, charging speed, and what is included.
The practical answers, shown step by step.
Is 5,000mAh enough for a day?
Yes for most daily phone backup moments. SolidSafe 5K is built for lighter carry, commutes, flights, nights out, and topping up before your phone hits zero.
Can I fly with SolidSafe 5K?
Yes. SolidSafe 5K is below the 100Wh carry-on battery limit. Carry power banks in your carry-on, not checked luggage, and always follow your airline rules.
How is it different from the 10K version?
SolidSafe 5K is slimmer and lighter for everyday carry. The 10K version gives you more capacity, more wired output, and more device flexibility for longer days.
What does semi-solid-state mean here?
SolidSafe cells use significantly less liquid electrolyte than conventional lithium-ion. That helps reduce fire risk, and internal puncture testing showed no fire or thermal runaway.
What devices can it charge?
It charges MagSafe and Qi2-compatible phones wirelessly, plus USB-C phones, earbuds, and other small USB-C devices. Wireless reaches up to 15W where supported, and USB-C output reaches up to 20W.
Can it charge a laptop?
It is phone-first. The 20W USB-C output can help smaller USB-C devices, but laptop-first charging calls for a higher-output laptop power bank.
How fast does it recharge?
USB-C input reaches up to 15W. With a 20W or higher USB-C PD wall charger, it can reach about 80% in roughly one hour.
What comes in the box?
SolidSafe 5K and a 60W USB-C cable.
Customer Reviews
Overall rating: 4.0 / 5 from 69 reviews.
Right out of the box, it’s easy to use. Am so happy I purchased this charger. It does not take up any space in my backpack and is lightweight too. This will make traveling much easier!
The battery requires 17.5 watt-hr to bring to full but only delivers 11.5 watt-hr to the load during charge. I have 2 and they both work the same way. Not quite the 19 watt-hr they are marked
Store owner replied:
Thanks for the detailed measurement. Power-bank capacity can be confusing because rated cell energy, input energy, and delivered output are not the same measurement. Some energy is lost during voltage conversion, and wireless charging loses more through heat and alignment than USB-C. If you can email support@heybmx.com with your test setup, order number, and a photo of the serial or batch number on the side, we can look into your exact unit.
I have been using the 5k version over the last couple weeks and absolutely love the product. Here are some of the highlights for me:
It is very useful friendly - just magnetize to the back of my phone and go! I have regularly used the charger traveling and it has made me forget about running out of power.
It’s much lighter and slimmer than other battery products. I can put it in my pocket easily or store in my backpack and go!
The LED screen provides updates and makes it easy to track charging activity and remaining power.
The colors are very cool (I got 3 different ones) and the attached cord / wrist band is a nice touch.
Overall, I am extremely happy with my purchase!
They are super light and thin which is perfect for on the move charging, plus the multi charging dock is really convenient right now my family is using the other two I have. it’s also convenient that it shows the wattage and charge level with a press of a button,10/10 recommend.
The size cannot be beat, nor can the convenience of the integrated plug for a faster charge up than just mag safe. It does heat the phone up while charging, though. Would definitely buy again and give as a gift, just know about the heat issue so it doesn't surprise you.
Store owner replied:
We’re very sorry your unit has stopped working and charging, especially after you already tried resetting it. We understand how frustrating that is. We’d like to make this right by providing a replacement. Please email support@heybmx.com with your order number and the name used at checkout, and we’ll take care of the next steps.
Thank you for reaching out it’s a good back up and I like it
The perfect size and makeup of an effective EDC backup battery. The 10k is perfect for travel but this size is my go to. The solid state technology makes me more comfortable carrying it everywhere without big safety concerns.
Wireless charging worked great at first with 15 watt output. Now, it charges at 7-8 watts. Tried with multiple phones. Wired charging has also slowed to 10-11 watt rate. The battery pack still works but disappointed with the reduced charging output.
Store owner replied:
That is not what we expect. Charging speed can vary by cable, charger, phone, case, and battery level, but it should not suddenly slow down that much. Please email support@heybmx.com with your order number, phone model, cable/charger used, and a short note about what changed so we can help check the unit.
I gave it 4 stars only because it doesn't fully charge (100%) my phone if it's down below 20%. Other than that I like the lightness and size. I also like the security of knowing that it won't blow up. I plan on ordering the larger capacity (which I should have done to begin with). But for short flights and only needing to keep my phone going to connect with rides it works.
Store owner replied:
Thanks for the feedback. Power-bank capacity can be confusing because the listed cell capacity is not the same as the exact percentage your phone receives. Some energy is lost during voltage conversion, and wireless charging loses more through heat and alignment than USB-C. For the most efficient charge, use the included USB-C cable. If your unit is draining unusually fast, email support@heybmx.com and we will help check it.
I got the 5k SOLIDSTATE power bank and I am very pleased with it. It works great, but I wish I had purchased the 10K bank as the 5k goes to almost 0 battery after fully charging my phone. Overall, it is a great product.
Store owner replied:
Thanks for the feedback. Power-bank capacity can be confusing because the listed cell capacity is not the same as the exact percentage your phone receives. Some energy is lost during voltage conversion, and wireless charging loses more through heat and alignment than USB-C. For the most efficient charge, use the included USB-C cable.
Store owner replied:
Thanks for the feedback. Wireless charging is convenient, but USB-C is faster and more efficient because it avoids alignment and heat losses. For the best result, use the included USB-C cable. If it is still charging unusually slowly or draining unusually fast over USB-C, email support@heybmx.com with your order number, phone model, and charger/cable used so we can help check it.
Very durable construction, and they charge my pixel 10 pro fold reliably, and are fast to charge in the dock. Having three means I usually use two with a spare on hand due to my heavy device usage.
Store owner replied:
Thanks for the feedback. Case thickness and case magnet placement can affect magnetic wireless charging, especially if the case is not Qi2 or MagSafe-compatible. The most reliable wireless fit is with a magnetic-compatible case or no case, and the included USB-C cable is the best fallback when a case gets in the way.
I can’t say personally because it was a gift, but I did get great feedback from the recipient.
This was a gift. I can only say what the receiver has said rather than a firsthand account. He has told me he really likes it a lot. He’s using it daily and appreciates the gift. So what I have heard from him is, he thinks the battery is terrific.
Poor Q2 charging, poor USB C supplied cable charging. On a Google Pixel 10 XL with 20 percent with a fully charged battery. Could only change the phone to 67 percent in over 40 minutes. Flat to full battery recharge took over a hour. I don't recommend this battery.
Store owner replied:
Thanks for the detailed testing notes. Charging speed can vary by phone, alignment, case, battery temperature, and the phone's own charging limits. USB-C should generally be the faster and more efficient option. We want to look at your exact setup, especially since you are seeing low results on both Qi2 and USB-C. Please email support@heybmx.com with your order number, phone model, case model, charger/cable used, and a photo or short video of the display readings so we can help check it.
I like the safety of solid-state. The display is excellent. Performance is good. BMX service is excellent.
Store owner replied:
Thanks for the honest review, and we are glad the service experience was strong. We appreciate you giving SolidSafe a try.
Q2 charging is extremely disappointing. A dismal 4 watts. Using the USB cable 15 watts. Recharging is also very poor 15 watts from a 67 watt charging block using a 100 watt cable. I suggest looking elsewhere for a Q2 Battery.
Store owner replied:
Thanks for the detailed testing notes. Charging wattage can vary by phone, alignment, case, battery temperature, and the phone's own charging limits. USB-C should generally be the faster and more efficient option. We want to look at your exact setup, especially since you are seeing low results on both Qi2 and USB-C. Please email support@heybmx.com with your order number, phone model, case model, charger/cable used, and a photo or short video of the display readings so we can help check it.
Fast wireless charging is available on this device.