Jackery · compact power
The original Explorer 300 is a small battery for phones, lights and a laptop. Its 300 W AC output is the limit to watch: a larger appliance can ask for more power than this box can deliver, even with a full battery.
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Consider it for small plug-in devices when carry weight matters. You get 2 AC outlets sharing the 300 W limit, plus USB charging. Check the total draw of everything you plan to plug in, not just the largest charger.
Look elsewhere for a fridge compressor, an electric kettle or overnight loads that need more energy. Its 500 W startup rating and 293.8 Wh battery are separate limits. The appliance calculator checks both against your load list.
At $0.98 per watt-hour, compare the compact alternatives below before paying extra for the Jackery name. For longer trips, the mid-size picks give you more energy to work with.
These estimates start with a full battery and run one device at a time through AC. The calculation is 293.8 Wh × 0.85 ÷ watts. No reserve is left; temperature, idle draw and battery age can shorten runtime.
| Device | Draw | Hours |
|---|---|---|
| Laptop (MacBook Air, charging) | 40 W | 6.2 |
| Smartphone charger (USB-C) | 20 W | 12.5 |
| CPAP machine (no heated humidifier) | 45 W | 5.5 |
| CPAP machine (with heated humidifier) | 53 W | 4.7 |
At the 45 W CPAP example, the estimate is 5.5 hours, shorter than the 8-hour night used in our calculator. Use the CPAP sizing guide with your machine's draw and humidifier settings before relying on it overnight.
The Explorer 300 has AC outlets. The Explorer 300D has USB and DC outputs, with no socket for a wall plug. Check the full name on the box; the D is not a cosmetic difference. This table compares those two models, not every generation carrying the 300 name.
| Unit | Wh | Output W (surge) | lb | Chemistry | Cycles | Price $ | $ / Wh | Store |
|---|---|---|---|---|---|---|---|---|
| Jackery Explorer 300 | 294 | 300 W (500 surge) | 7.1 | Li-ion (unspecified) | 800 to 80% | $289 | $0.98 | See it at JackeryCheck price on Amazon |
| Jackery Explorer 300D | 288 | no AC outlet | 5.5 | LiFePO4 | 4,000 to 70% | $209 | $0.73 | See it at JackeryCheck price on Amazon |
Compare the cycle count together with the remaining-capacity percentage. The battery chemistry guide explains why a cycle rating is not a promise of years in service.
These alternatives stay in the same battery-size band and have an AC inverter. Compare output as well as price per watt-hour if you want to run more than chargers.
Compact alternative4.0/5 overall
Score from the maker's figures and 2 independent reviews
Why it’s here
286 Wh with 600 W (1,200 surge); $0.98 per watt-hour.
$279 · $0.98/Wh
Compact alternative3.2/5 overall
Scored from the maker's published figures; no independent reviews yet, so no award label
Why it’s here
288 Wh with 350 W (600 surge); $1.04 per watt-hour.
$299 · $1.04/Wh
Compact alternative3.5/5 overall
Score from the maker's figures and 1 independent review; under two, so no award label
Why it’s here
297 Wh with 350 W (600 surge); $1.18 per watt-hour.
$350 · $1.18/Wh
Smallest battery first. DC-only models remain in the table so you can compare weight and price, but they cannot power a wall plug.
7 units
| Unit | Chemistry | Cycles | Store | ||||||
|---|---|---|---|---|---|---|---|---|---|
| EcoFlow RIVER 3 Plus | 286 | 600 W (1,200 surge) | 10.4 | 220 | LiFePO4 | 3,000 to 80% | $279 | $0.98 | See it at EcoFlowCheck price on Amazon |
| BLUETTI Elite 30 V2 | 288 | 600 W | 9.5 | 200 | LiFePO4 | 3,000 to 80% | $449 | $1.56 | See it at BLUETTICheck price on Amazon |
| Jackery Explorer 300D | 288 | no AC outlet | 5.5 | 100 | LiFePO4 | 4,000 to 70% | $209 | $0.73 | See it at JackeryCheck price on Amazon |
| OUPES Exodus 350 | 288 | 350 W (600 surge) | 9.2 | 240 | LiFePO4 | 4,000 to 80% | $299 | $1.04 | See it at OUPESCheck price on Amazon |
| Jackery Explorer 300 | 294 | 300 W (500 surge) | 7.1 | – | Li-ion (unspecified) | 800 to 80% | $289 | $0.98 | See it at JackeryCheck price on Amazon |
| Goal Zero Yeti 300 | 297 | 350 W (600 surge) | 13.7 | 200 | LiFePO4 | 4,000 to 80% | $350 | $1.18 | See it at Goal ZeroCheck price on Amazon |
| 4Patriots Patriot Power Sidekick Solar Generator | 299 | 300 W (360 surge) | 8.4 | – | LiFePO4 | 2,000 | $500 | $1.67 | See it at 4PatriotsCheck price on Amazon |
Do not assume it will. With the 45 W no-humidifier example, the full-battery AC estimate is 5.5 hours before any reserve. Your machine, settings and connection change the result. The CPAP page helps size a longer night.
No. The 300D is a different model with USB and DC outputs. Choose the original Explorer 300 or another AC model if your equipment uses a wall plug.
Their combined running draw must stay below 300 W on AC, and startup demand also matters. Each extra device draws from the same battery, so the single-device runtime estimates above cannot be added together.
