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| Connector Type | USB Type A, USB Type C |
|---|---|
| Brand | ColdBye |
| Battery Capacity | 10000 Amp Hours |
| Color | Beige |
| Special Feature | Auto Shut-Off, Digital Display, Fast Charging, Lightweight |
| product_dimensions | 3.7 x 0.7 x 2.5 inches |
|---|---|
| item_weight | 6.7 ounces |
| item_model_number | RTAX-013S |
| batteries | 1 Nonstandard Battery batteries required. |
| best_sellers_rank | #2,599 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #141 in Cell Phone Portable Power Banks |
| special_features | Auto Shut-Off, Digital Display, Fast Charging, Lightweight |
| other_display_features | Wireless |
| color | Beige |
| manufacturer | Shenzhen R-TAX Technology Co., Itd |
| date_first_available | July 2, 2025 |
Product video 1
Customers say
Customers find the power bank charges quickly, taking 2 hours from empty, and stays charged for extended periods.
This 7.4V/5V 10000mAh battery pack is a perfect match for my heated vest. It’s ultra-small and lightweight, yet holds a solid charge that keeps the vest warm for hours on chilly days. The compact design makes it easy to carry without bulk, and the battery feels well built. Charging is simple and fast, and it delivers consistent power throughout use. Read more
I got this battery pack for my heated vest and it works great. It’s small and lasts for hours, which makes cold days so much easier. I like that it has both 7.4V and 5V so I can power my vest or charge my phone if needed. Fits perfectly in the vest pocket and feels reliable. It does take a while to recharge, but overall it’s super practical and worth it. My son is a trucker driver up North and this battery last his whole 10hr. Work days. This is a great investment. Read more
Exactly what I needed to upgrade from the heavy battery pack to this one. It’s lightweight and better battery life and stays warm all day and night. It’s the perfect size to fit and not be noticeable or bothering you. Charges fast and last all day. Can also use to charger phone which is a bonus! All around great product Read more
If you own a heated vest, you know that the performance is only as good as the battery driving it. After testing the ColdBye 7.4V replacement pack, it has quickly become my go-to over the original battery that came with my gear. Many universal power banks are only 5V, which often results in lukewarm heat. This 7.4V pack delivers the higher voltage necessary to get the heating elements up to their maximum temperature quickly. It’s slim enough that I don't feel a heavy "sag" in my vest pocket. It fits comfortably against the body without being bulky or intrusive during outdoor activities like hiking. On a medium setting, I’m getting a solid 6–8 hours of consistent warmth. Even on the highest setting, it holds its own through a full morning of freezing temperatures. The inclusion of a USB output is a great "just in case" feature, allowing me to top off my phone in an emergency without needing a separate brick. This is a high-quality, dependable power source. It feels rugged, charges relatively quickly for its capacity, and most importantly, it keeps the heat consistent rather than tapering off as the battery drains. If you need a backup for long days outdoors or a replacement for a lost charger, this is a perfect fit. Read more
This battery pack works perfectly with my heated vest! It charges quickly, holds power for a long time, and keeps the heat consistent without cutting out. It’s compact, lightweight, and easy to carry without feeling bulky. I love how dependable it is! Especially in cold weather! Read more
So easy to use; it charged up very quickly. It's made very good quality material. Heavy duty, but did not weigh a lot. Also liked the small size of it. It has stayed charged for a week now, which to me is a long time. It heated up fast and consistent heat. Read more
This battery pack is compact yet powerful. The dual output is very convenient since I can also charge my phone when needed. Battery life is solid. I really like the LED display, which makes it easy to check the remaining battery level at a glance. Overall, it’s reliable, portable, and works great for heated clothing and outdoor use. Read more
I purchased this 7.4V battery about a month ago because of its compact size for my Ororo vest. It was easier to fit into my vest and much lighter in weight. At first I was very impressed with the ColdBye battery but recently it either has problems turning on or will completely stop working. When I charge it up at home, I find that there is upwards of 90% power still left in the ColdBye. I'm wondering if this is a defective battery or a deficiency of a ColdBye 7.4V battery. Either way, buy at your own risk. Read more