JDST online Rainbow Smart Rechargeable Hand Warmer: Adjustable temperature with specific gear settings (e.g., 1st gear 116.6-125.6°F, 2nd gear 131-140°F)
This Rainbow Smart Rechargeable Hand Warmer is for anyone who braves the cold outdoors, like a parent cheering at a child's soccer game or a commuter waiting for the bus. While many hand warmers focus on basic heat, this one offers a reliable companion for daily comfort, ensuring your hands stay warm without constant fuss.
It heats up in just 6 seconds, so you feel warmth almost instantly when you need it most. The adjustable temperature settings let you choose the right level, from a gentle warmth for sensitive skin to a stronger heat for freezing conditions. With a built-in 6000mAh battery, it provides 3-6 hours of heat on a single charge, and the power bank function means you can charge your phone too—no more dead batteries in the cold. The dual heat plates deliver 360-degree coverage, keeping your entire palm cozy. Its compact size fits easily in a pocket, and the water-resistant design handles light snow or rain. Use it for outdoor activities, travel, or everyday errands to stay comfortable all season.
Features
- Built-in 6000mAh rechargeable lithium battery
- Heats up in 6 seconds
- Provides 3-6 hours of heat
- Power bank function with USB output
- Dual heat plates for 360-degree heat
- 4 heat settings from 104°F to 122°F
- Charge time of 4 hours
- Charging LED indicators
- CE certified and ROSH compliant
- Water-resistant but not submersible
- Material: ABS + Aluminum Alloy
- Optional colors: Champagne Gold, Blue, Pink, Silver
- Input: 5V/1.5A, Output: 5V/1.5A
- Size: approximately 4 x 2.3 x 0.7 inches
- Weight: 0.287 lbs
- Battery: built-in 5000mAh lithium battery
- Working time: 4-8 hours
- Input port: Micro USB
- Temperature settings: Low 95-104°F, High 122-140°F, Constant 104-122°F
- Long press to turn on/off, short press to switch settings
- Split magnetic design for dual-palm use
- 2 x 5000mAh battery capacity
- Rapid start in 10 seconds
- Provides 6-9 hours of heat
- USB-C cable included
- Input: USB-Type C 5V 2A, Output: USB 5V 2.1A
- Port cover included
- Adjustable temperature with specific gear settings (e.g., 1st gear 116.6-125.6°F, 2nd gear 131-140°F)
General specs
- Brand: JDST online
- Model: Rainbow Smart
- Seller: Joom
- ID: 692140ebbea802017e343538
- Power Source: Rechargeable Battery
- Charging Method: USB
- Temperature Control: Smart
- First listed by seller: 12/6/25
If you are interested in more details, you can find full information on the seller's page.
Shipping options
United States
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| Brand | JDST online | OCOOPA | UNIHAND | HotHands | HotHands | Glyduny |
| Model | Rainbow Smart | UT3 Lite | AOY-766 | 10 pack Super Warmers | HH1ED240E | Period Cramp Massager |
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| Price | $51.16 | $15.99 | $16.99 | $7.48 | $27.36 | $17.99 |
| Seller | Joom | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | Mar 18, 2026 | Mar 11, 2026 | Mar 11, 2026 | Mar 11, 2026 | Mar 11, 2026 | Nov 9, 2025 |
| Power Source | Rechargeable Battery | Battery Powered | Battery Powered | Manual | ||
| Size | 2-Pack Pocket Size | Small | 10 Individual Warmers | Pack of 40 | ||
| Material | Aluminum | Aluminum | Iron | Soft velvet | ||
| Included Components | 2*UT3 Lite Electric hand warmers, 1*Pouch, 1*User Manual, 1*2-in-1 charging cable | Hand Warmers Rechargeable x2 | 10 Super Warmers | |||
| Upper Temperature Rating | 126 Degrees Fahrenheit | 160 Degrees Fahrenheit | 160 Degrees Fahrenheit | |||
| Reusability | Rechargeable | Single Use | Single Use | |||
