HKM-498259 DIY Mobile Power Box for Custom Power Bank and Battery Charger with Dual Inputs and LCD Display
SKU: 37233673197

HKM-498259 DIY Mobile Power Box for Custom Power Bank and Battery Charger with Dual Inputs and LCD Display

Sale price$71.99 Regular price$79.99
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

HKM-498259 DIY Mobile Power Box for Custom Power Bank and Battery Charger with Dual Inputs and LCD DisplayIntroducing the HKM 498259 DIY Mobile Power Box, your ultimate solution for a custom power bank and battery charger. This versatile device allows you to create a power bank tailored to your needs using four 18650 lithium ion batteries, enabling an external power supply that ensures your devices stay charged on the go. The HKM 498259 showcases dual input options an 8 pin connector and a Micro USB port. This convenient feature means you can easily

Introducing the HKM-498259 DIY Mobile Power Box, your ultimate solution for a custom power bank and battery charger. This versatile device allows you to create a power bank tailored to your needs using four 18650 lithium-ion batteries, enabling an external power supply that ensures your devices stay charged on-the-go.

The HKM-498259 showcases dual input options - an 8-pin connector and a Micro USB port. This convenient feature means you can easily calculate the power capacity without the hassle of multiple cables. Plus, with dual outputs, you can charge your smartphone, tablet, or other small electronic devices simultaneously, maximizing efficiency during your busy days.

Equipped with an independent circuit, this power box enables charging and discharging at the same time, ensuring there’s no interference between operations. The LCD display screen clearly indicates the battery status, giving you real-time information on remaining capacity for each battery.

Safety is paramount, which is why the HKM-498259 incorporates reverse polarity protection. If incorrectly connected, the internal chip automatically cuts power, preventing any potential damage and safeguarding other circuits from disruption.

Please note that this product does not include batteries, effectively minimizing risks associated with battery transportation. With the HKM-498259, you can confidently choose your own battery capacity and core, steering clear of low-quality and counterfeit options.

Optimize your charging solution with the HKM-498259 DIY Mobile Power Box, where customization meets reliability.

Size: 100*84*26 mm
Input: DC 5V-1A
Output: DC 5V-1A DC5V-2A

Properties:
DIY Power Bank and Charger: custom capacity by 4x18650 li-ion battery to make your own power bank, portable external supply, offers your devices enough power. Also a battery charger for 18650 battery, a dual-use item
Dual Inputs: 8 Pin and Micro USB dual inputs, only one cable can calculate the power bank, easy operation
Dual outputs, can charge cell phones, pads or other small electronic devices at the same time
Independent circuit: Independent battery, charge and discharge at the same time, can work together and not influence each other
LCD display screen: Each battery independently clearly shows subtitles, easy to read the remaining capacity
Reverse Polarity Protection: When it comes to reversed polarity, the chip inside will automatically identify and cut the power of the reverse polarity circuit, showing an empty battery level
Conversely polarity will not affect the normal operation of other circuits

note:
1. This product does not contain batteries. And effectively avoid the risks and troubles caused by battery transportation.
2. Guarantee quality, DIY custom capacity. Determine the capacity and battery core by yourself. Reject false capacity, low quality inferior batteries, and fake batteries.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 37233673197

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4.8 ★★★★★
Based on 2033 reviews
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Verified Purchase
Ellen and Stephen
Grantham, US
★★★★★ 5
Great Multi-Function Watch
Color: Gray/Digital/Gray
I absolutely love my Timex Ironman watches. I have had many over a very long period of time. Wonderful set of functions for the price. Very affordable. Easy to use. Lasts a long time. Very easy to read in standard lighting. I like the Indiglo when needed, but do not use it too often. Absolutely love the ability to set a repeat timer to remind me to do something at a fixed interval, or to keep me on task for a fixed period of time. Great to be able to set three independent alarms. Potential to capture a huge number of splits with the stopwatch. I purchased this watch to replace a similar model with a dead battery. I have replaced batteries in the past, but it is quicker and easier to buy a replacement watch. I am saving my old watches for that day in the future when the Ironman model may no longer be available. I expect this will be my watch of choice for the rest of my life.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
E
Verified Purchase
E-Dub
Phoenix, US
★★★★★ 5
Just fine if you have simple needs...
Color: Black/Digital/Black/Green
Exactly what I needed: a cheap, durable wrist watch. The only thing it was lacking were instructions, but about 5 minutes of messing with the buttons got it set up
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
S
Verified Purchase
S S.
San Leandro, US
★★★★★ 5
Nice watch
Color: Black/Digital/Black/Green
Good watch
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
P
Verified Purchase
@photobrow
Lexington, US
★★★★★ 5
Compared to g-shock?
Color: Black/Yellow
Firstly random public reviews can be comical…”it’s has a battery, terrible, One star” or “I don’t like yellow, one star” omg peoples do better. I’ll review this while comparing to an older style of g-shock from the same era. I’ll start by saying this timex rocks, for me in my mid 50’s it’s so retro and nastalgic, brings back memories, I may have even owned this model back in the day. What’s great about it- the display, larger digits than the typical g-shock and they are super crisp, clear and easy to read. The indiglo is awesome. This is the most accurate quartz watch I have aside from the atomic g-shocks that adjust themselves daily. I prefer a chunky watch and the g-shocks do a better job in that department. i feel this watch is rugged, but I’d still give the nod to g-shock in this department. 200M water resistance is the gold standard and this watch has it which I love for peace of mind for any water based activities. This is a 5 star watch at a great price. I still love some aspects of a g-shock better but its just preference.
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Reviewed in the United States on February 11, 2026
T
Verified Purchase
Tanya
San Leandro, US
★★★★★ 5
Everybody loved the high-tech style and amazing functionality
Color: Black/Yellow
I'm not a Timex fanboy, and I've had my fair share of problems with the Expedition line, so this review is my honest opinion as a man who's worn Armitrons and Timexes since I was 10. I remember in 1992 when the Timex Ironman Triathlon with Indiglo was first launched - My older brother got one, then me and my neighbor friends. Everybody loved the high-tech style and amazing functionality. Even Bill Clinton was rock'n this watch, for those who don't remember. Quite simply, this is the perfect watch at a great price, in my opinion. Perfect as a gift for any man, and I think the original black/olive drab/yellow coloration is still the coolest. In this day and age of smartphones, it still pays to have this watch. The alarm is less annoying sounding than a cellphone, and doesn't wake up the entire house. To turn it off, just tap the watch, no more reaching for the phone or alarm clock. Timer comes in handy for anything; timing my kids' timeouts when they get in trouble, 15 minutes room clean-up times, etc. Chrono is fun for anything you wanna use a stop-watch for. I set the second time zone for Vietnam time. It really is a million times easier to use this watch for all of its functions than reaching for a smartphone or alarm clock, etc. If you;ve been relying on your phone for a few years as a watch/chronograph/timer/alarm - you'll be so glad you finally got a watch like this. I've never tried a smart-watch, however I feel those are not as necessary,durable or practical as a real watch. Other Timex watches I've used were freakin' trash - couldn't throw em away fast enough. Might as well open the box while holding it over a trash can, so the watch can fall right in when you open the box. That's my experience with the Expedition line-up. Back to this watch: The only thing I wish this watch could do is measure activity thermogenesis (calories expended throught the day) or work as a pedometer, which some smart-watches and other devices can do. I also cannott decide if I like this new, slightly larger, heavier/thicker design of the Ironman Triathlon over the 1990s design. The 90s models styling was "tight to death'. Star-split buttons were seperated. The mode button was yellow. Overall more compact and bi-cultural;by that I mean it looked great as an athletic watch or a politician, business man wathc. This new model is bigger, better ingress/shock resistance, and more of an athletic style over all, and is a little less colorful. I almost went with the G-shocks, but they still just look like crap and are waay to expensive. Sure, they have some better features, can survive WWIII, but I am a traveler. I need a watch that can work in the dark in any environment. The G-shocks are often using some kind of solar battery crap and rely on cathing a signal from an American automic clock in Colorado - good luck with that while your in Thailand on vacation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 31, 2016

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