Jackery Explorer 300 JE-300E LiFePO4
- AC delivered · est.
248 Wh. Show source
estimated sourceamazon.com ↗2026-07-27- output
300 W. Show source
claimed sourceamazon.com ↗- surge
600 W. Show source
claimed sourceamazon.com ↗- weight
3.4 kg. Show source
claimed sourceamazon.com ↗
Balanced
#6 of 14
in the Ultraportable / carry class
Lifted by Durability & longevity and Portability; held back by capacity & expansion.
Check current availability and pricing at the retailer.
Check price on AmazonSee alternatives to the Jackery Explorer 300 JE-300E LiFePO4 →At a glance
Jackery Explorer 300 JE-300E LiFePO4 is a ultraportable / carry model best suited to buyers matching its sourced output and capacity. It supplies 300 W of continuous AC output. BatteryRank scores it 54 out of 100 within its size class.
Our verdict on the Jackery Explorer 300 JE-300E LiFePO4
This is the lithium-iron-phosphate revision of an older design, and the chemistry change is the entire story. The 4,000-cycle rating is what LiFePO4 buys — several times what the lithium-ion generation it replaces could offer at the same 292 Wh. At 3.4 kg with two AC outlets and 300 W continuous it remains a small unit for small jobs, but it is now one specified to survive a decade of them rather than a couple of seasons.
- You want the longest-lived small pack you can carry easily4,000 rated cycles on a 292 Wh pack weighing 3.4 kg is the best life-per-kilogram combination in our small-unit data.
- Two mains devices need to run at once in a very light unitTwo AC outlets sharing 300 W is unusual at 3.4 kg, where single-socket designs are the norm in this size class.
- You want meaningful runtime rather than convenience292 Wh is a few hours of laptop use, and no amount of cycle life changes what a pack that size can hold in a single charge. It holds 512 Wh with the same portability class.
- Anything you own has a motor or a heating element300 W continuous with a 600 W ceiling is well below what a compressor, a kettle or a power tool asks for, even briefly. It offers 1,000 W continuous and 2,000 W of headroom.
The honest limit: The chemistry upgrade is the reason to prefer this over the outgoing version, and it improves exactly one thing: how many times you can refill it. Capacity, output and surge are unchanged, so the unit does nothing today that its predecessor did not — it simply keeps doing it for considerably longer.
What our data can’t tell you: Our record for this variant lacks a sourced solar input ceiling, an AC recharge time and any independent capacity measurement, so three ordinary questions about it have no answer here. We hold a measured figure for the closely related 300 Plus, but different cells and a different outlet count mean it cannot be carried across.
BatteryRank Engineering Team · Last reviewed · Method
Capacity truth
The watt-hour number on the box isn't what reaches your devices. Rated on the label vs what actually leaves an outlet.
292 Wh. Show source
claimed sourceamazon.com ↗2026-07-27The marketing number — total cell capacity.
248 Wh. Show source
estimated sourceestimate = battery-side usable capacity × 85% inverter efficiencyWhat reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.
What it can run
Same sourced device assumptions used by our calculators, applied to this model's usable AC energy. Actual runtime varies with load, temperature, and standby draw.
| Device | Estimated runtime | Sourced assumption |
|---|---|---|
| CPAP (humidifier off) | about 3.4 nights | 9 W · |
| CPAP (heated humidifier on) | about 0.6 nights | 56 W · |
| Refrigerator (full-size) | about 3.9 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 14 hours | 18 W · |
| Laptop (65W charger) | about 7.6 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 12 full charges | 20 W · |
How it scores
Four buyer pillars over seven sub-scores — computed from sourced data with a published formula, price-independent by design.
Power
est.Battery-side usable capacity and how much you can run at once.
Usable watt-hours and how far you can grow it with add-on batteries, versus its size class.
Continuous and surge wattage, outlet count, and USB-C fast-charging.
Trust
est.42% dataOwner reputation, safety record, warranty, and build durability.
Owner ratings, brand reputation, recall record, and warranty backing.
Rated cycle life, warranty length, cell chemistry, and weather sealing.
Charging
Wall and solar recharge speed.
Wall recharge speed, solar input, and multi-source charging.
Livability
62% dataLightweight, portable, and quiet enough to live with.
Weight, footprint, handle, and wheels, versus its size class.
Fan noise under load — quieter is better for bedrooms and CPAP use.
How this score is computed
The BatteryRank score is computed from sourced data with a published formula — ranked by data, not lab testing. Seven sub-scores blend into a 0–100 composite, grouped into four buyer pillars. Price is deliberately not a scoring input: prices move daily, so value intelligence lives in the price section above, judged against this model's own history.
| Pillar | Built from |
|---|---|
| Power | Capacity & expansion + Output & versatility |
| Trust | Trust & reliability + Durability & longevity |
| Charging | Charging & solar |
| Livability | Portability + Quiet / livability |
Scores are cohort-relative — each model is ranked against others in its size class. Missing inputs renormalize out rather than scoring zero (a model is never penalized for a spec nobody in its class publishes), and any figure resting on a documented estimate is tagged est. A full methodology page is coming.
Full specifications
Manufacturer-claimed unless marked verified (FCC/UL/DOE/lab). Tap or focus a figure to view its source.
Capacity & battery
- Rated cycle life
4,000 cycles. Show source
claimed sourceamazon.com ↗- Battery chemistry
LiFePO4. Show source
claimed sourceamazon.com ↗- Rated capacity
292 Wh. Show source
claimed sourceamazon.com ↗- Cycle-life threshold
70 %. Show source
claimed sourceamazon.com ↗
How many full charge-and-drain cycles before the battery drops to its rated threshold (shown alongside — brands rate to different thresholds, so never compare bare cycle counts).
The type of battery cell. LiFePO4 (LFP) cells last far more cycles and are more thermally stable than older lithium-ion (NMC) cells.
The battery's nameplate energy capacity — the headline number on the box. Battery-side usable and AC-delivered capacity are shown separately.
The remaining-capacity level the cycle rating is measured to. 3,000 cycles to 80% is a stronger battery than 3,000 cycles to 70% — always read the two numbers together.
Power output
- Continuous power output
300 W. Show source
claimed sourceamazon.com ↗- Surge power output
600 W. Show source
claimed sourceamazon.com ↗- AC outlets
2 outlets. Show source
claimed sourceamazon.com ↗- USB-A ports
2 ports. Show source
claimed sourceamazon.com ↗- USB-C ports
1 ports. Show source
claimed sourceamazon.com ↗- USB-C max output
100 W. Show source
claimed sourceamazon.com ↗- 12V car ports
1 ports. Show source
claimed sourceamazon.com ↗
The most power you can draw at once, sustained — this has to be higher than the running wattage of whatever you're plugging in.
A brief power spike the unit can absorb when a device first switches on — matters for things with motors or compressors, like fridges.
How many standard wall-style outlets are built in.
How many USB-A ports are built in, for charging older phones, lights, and accessories.
How many USB-C ports are built in — check the per-port wattage below if you need fast charging for a laptop.
The fastest a single USB-C port can charge a device — relevant for laptops and fast-charging phones.
How many car-socket (cigarette-lighter) style 12V outputs are built in — what CPAPs and car fridges plug into for the most efficient overnight running.
Size & portability
- Weight
3.4 kg. Show source
claimed sourceamazon.com ↗
How much the unit weighs on its own, without accessories — relevant for portability and carrying it up stairs during an outage.
What reviewers & owners report
Named outlets and marketplaces, each rating credited where it was published.
What else to consider instead of the Jackery Explorer 300 JE-300E LiFePO4
Same or adjacent size class, ordered by the price-independent composite. Every alternative is better than the Jackery Explorer 300 JE-300E LiFePO4 at something and worse at something else, so each row states both halves — each one arithmetic on two sourced readings, with a dimension skipped rather than guessed when either side is missing a figure.
- Goal Zero Yeti 300score 71 · same size class
- Why you would switch
- The Goal Zero Yeti 300 carries 17% more continuous output (350 W vs 300 W), which decides what it can run at all.
- What you give up
- The Jackery Explorer 300 JE-300E LiFePO4 is 45% lighter (3.4 kg vs 6.2 kg).
- EcoFlow RIVER 3 Plusscore 65 · same size class
- Why you would switch
- The EcoFlow RIVER 3 Plus carries 100% more continuous output (600 W vs 300 W), which decides what it can run at all.
- What you give up
- The Jackery Explorer 300 JE-300E LiFePO4 is 28% lighter (3.4 kg vs 4.72 kg).
- Bluetti Elite 30 V2score 63 · same size class
- Why you would switch
- The Bluetti Elite 30 V2 carries 100% more continuous output (600 W vs 300 W), which decides what it can run at all.
- What you give up
- The Jackery Explorer 300 JE-300E LiFePO4 is 21% lighter (3.4 kg vs 4.3 kg).
- Anker SOLIX C300score 62 · same size class
- Why you would switch
- The Anker SOLIX C300 delivers 8% more usable AC energy (269 Wh vs 248 Wh).
- What you give up
- The Jackery Explorer 300 JE-300E LiFePO4 is 17% lighter (3.4 kg vs 4.1 kg).
- EcoFlow RIVER 3score 55 · same size class
- Why you would switch
- The EcoFlow RIVER 3 carries 5 years of warranty against 2.
- What you give up
- The Jackery Explorer 300 JE-300E LiFePO4 delivers 19% more usable AC energy (248 Wh vs 208 Wh).
Quick answers
Each answer restates a sourced figure from elsewhere on this page — nothing new, nothing guessed.
- How much does the Jackery Explorer 300 JE-300E LiFePO4 weigh?
- 3.4 kg (7.5 lb), manufacturer-claimed, without accessories.
- What are the dimensions of the Jackery Explorer 300 JE-300E LiFePO4?
- 230 × 153 × 199 mm (9.1 × 6 × 7.8 in), length × width × height, manufacturer-claimed.
- How much capacity does the Jackery Explorer 300 JE-300E LiFePO4 deliver through an AC outlet?
- About 248 Wh of the rated 292 Wh reaches an AC outlet from a full charge — an estimate after our published 15% inverter-loss constant (marked est. on this page).
- How many watts can the Jackery Explorer 300 JE-300E LiFePO4 output?
- 300 W continuous AC output and 600 W surge output, manufacturer-claimed. Appliance startup demand must stay within the relevant limit.
- What is the cycle-life rating of the Jackery Explorer 300 JE-300E LiFePO4?
- 4,000 cycles to 70% remaining capacity, manufacturer-claimed. A cycle rating is not a calendar-life guarantee.