How long will a power station run my insulin cooler?
Which power station runs an insulin cooler longer?
Which station runs longer depends on watt-hours, the cooler's watts, and USB efficiency.
The Anker SOLIX C300 DC and the BLUETTI Elite 30 V2 are both 288 watt-hours, so at an assumed 90 percent efficiency they match on a 5 watt cooler.
Capacity and the 5 watt load are as of October 6, 2026.
Published specs
| Item | Spec | Value |
|---|---|---|
| 4AllFamily Voyager, 5 W USB | Load | Input power 5 W. Input voltage DC 5 V, as of October 6, 2026 |
| Anker SOLIX C300 DC | Capacity | 288 watt-hours, as of October 6, 2026 |
| Anker SOLIX C300 DC | Output | 300 watts, as of October 6, 2026 |
| Anker SOLIX C300 DC | Chemistry | LiFePO4, as of October 6, 2026 |
| BLUETTI Elite 30 V2 | Capacity | 288 watt-hours, as of October 6, 2026 |
| BLUETTI Elite 30 V2 | Output | 600 watts, as of October 6, 2026 |
| BLUETTI Elite 30 V2 | Chemistry | LiFePO4, as of October 19, 2026 |
| BLUETTI Elite 30 V2 | Weight | 4.3 kg, as of October 19, 2026 |
An Anker SOLIX C300 DC at 288 watt-hours, at an assumed 90% USB efficiency, runs this 4AllFamily Voyager, 5 W USB, for about 2.2 days (51.8 hours). As of October 6, 2026.
4AllFamily's FAQ lists Voyager input power as 5 watts at 5 volts DC. That is a travel medicine cooler, not a household mini fridge. A start surge is not published. As of October 6, 2026.
4AllFamily lists a 5 watt input and does not publish a start surge. Both stations here have a published 5 volt USB output, so the hours use that path at an assumed 90 percent USB efficiency. Neither maker publishes that efficiency. As of October 6, 2026.
Check the device manual, and ask your doctor, before you count on backup power for this device. This page is a power estimate, not medical advice.
Estimated runtime
Multi-day
2.2 days (51.8 hours)
288 watt-hours at an assumed 90% USB efficiency is 259.2 watt-hours delivered. This load averages 5 watts. 259.2 divided by 5 is about 51.8 hours.
Assumption: USB efficiency is 90%. That figure is not a published spec.
4AllFamily lists input power of 5 watts at 5 volts DC. A start surge is not published. On the C300 DC, the hours use USB-C1 at 5 volts and 3 amps. On the Elite 30 V2, the hours use a USB-A port at 5 volts and 3 amps, which the manual lists at 15 watts max. Both use an assumed 90 percent USB efficiency, because that efficiency is not published. The FAQ also lists an adapter input of AC 220 volts. That is the adapter rating, not the cooler load.
A station in this range
Anker SOLIX C300 DC on AmazonWe own one.Affiliate link, I may earn a commission.
Worked example
4AllFamily Voyager, 5 W USB on the Anker SOLIX C300 DC (288 watt-hours) at an assumed 90% USB efficiency. Specs in this example are as of October 6, 2026.
| Step | Figure |
|---|---|
| Running watts | 5 watts |
| Duty cycle | 100 percent of the time |
| Average watts | 5 x 1.00 = 5 watts |
| Nameplate volts | 120 volts |
| Delivered watt-hours | 288 x 0.90 = 259.2. 90 percent is an assumed USB efficiency, not a published spec. |
| Hours | 259.2 / 5 = about 51.8 |
Result: 2.2 days (51.8 hours).
Assumptions
| Assumption | Value | Note |
|---|---|---|
| USB efficiency | 90%, assumed, as of October 6, 2026 | Not published. Neither Anker's C300 DC user guide nor the Elite 30 V2 US manual gives a USB conversion efficiency. 90 percent is an assumption for both stations on this page. It is not a spec. |
| C300 DC ports | USB-C1, 5 V at 3 A, as of October 6, 2026 | The user guide lists USB-C1 up to 100 watts, including 5 volts at 3 amps. That covers a 5 watt cooler. There is no AC outlet. |
| Elite 30 V2 ports | USB-A, 5 V at 3 A, as of October 6, 2026 | The US manual lists each USB-A port at 5 volts, 3 amps, 15 watts max. The USB-C ports also list 5 volts at 3 amps. This estimate uses a USB-A port. AC output is 600 watts at 120 volts and is not used for these hours. |
| Running watts | 5 watts, as of October 6, 2026 | Published input power. Not a measured daily kilowatt-hour total. |
| Duty cycle | 100 percent, as of October 6, 2026 | The FAQ describes USB cooling while the lid is powered. No on-off cycle is published. |
| Start surge | Not published, as of October 6, 2026 | Nothing is added for a start surge. |
| What this is not | Not a household fridge, as of October 6, 2026 | A compact mini fridge is a different preset, on the fridge calculator. This page stays on the travel cooler. |
Questions
How long will the C300 DC run a 5 watt cooler?
About 2.2 days (51.8 hours) at an assumed 90 percent USB efficiency. Anker does not publish that efficiency. 288 watt-hours times 0.90 is 259.2 watt-hours delivered, and 259.2 divided by 5 watts is 51.8 hours. The port used is USB-C1, 5 volts at 3 amps. As of October 6, 2026.
How long will the Elite 30 V2 run the same cooler?
About 2.2 days (51.8 hours) at an assumed 90 percent USB efficiency. The US manual does not publish that efficiency. 288 watt-hours times 0.90 is 259.2 watt-hours delivered, and 259.2 divided by 5 watts is 51.8 hours. The port used is USB-A, 5 volts at 3 amps, listed at 15 watts max. As of October 6, 2026.
Is this a mini fridge?
No. The preset is the 4AllFamily Voyager travel cooler, listed at 5 watts. A household compact refrigerator is on the fridge calculator and uses much more energy. As of October 6, 2026.
Does the page claim the medicine stays in range?
No. The page only estimates electrical runtime from the published 5 watt input. It does not say the cooler will hold a temperature, and it does not say a power station is safe for a person. Check the cooler manual and ask your doctor. As of October 6, 2026.
Sources
Updated .
- 4AllFamily Voyager4AllFamily's FAQ lists Voyager input power as 5 watts at 5 volts DC. That is a travel medicine cooler, not a household mini fridge. A start surge is not published. As of October 6, 2026.
- Anker SOLIX C300 DCAnker's C300 DC user guide lists a 288 watt-hour cell capacity, 300 watts total output, and a USB-C1 port that includes 5 volts at 3 amps. It does not publish a USB conversion efficiency. As of October 6, 2026.
- BLUETTI Elite 30 V2The Elite 30 V2 US manual lists 288 watt-hours, 600 watts of AC output at 120 volts, and a USB-A output of 5 volts at 3 amps. The USB-C ports also list 5 volts at 3 amps. It does not publish a USB conversion efficiency. Manual: https://s4.bluettipower.com/bluetti/purchasePageBiz/2026/03/Elite-30-V2-User-Manual-US-EN-FR-1774505672699-1246.pdf As of October 6, 2026.