Jackery Explorer 300D

Photo from the manufacturer

Ultraportable F1 · Outlet-sized (up to 1 kWh)

Jackery Jackery Explorer 300D

Name: Jackery Explorer 300D
Brand: Jackery
Price: 149.00 EUR
Availability: InStock
Author: JouleSpecs

Manufacturer's list price

149 € ≈ $161

JouleSpecs does not sell and does not show shop prices: check the price where you buy.

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Data from official source

Sheet curated by JouleSpecs — We check every spec sheet against the manufacturer's own documentation: each value carries its source and the date we read it. Published Sept. 21, 2026 · Last updated Sept. 21, 2026 · Data verified Sept. 21, 2026

Jackery Explorer 300D is a portable battery with lithium iron phosphate cells that does without an AC outlet entirely: it charges only through the USB-C, USB-A ports and the 12 V output for car accessories. It's built for anyone who needs to keep a phone, tablet, camera, a small laptop or a lamp charged, not for appliances that plug into a wall socket.

The main USB-C port charges and outputs up to a hundred forty watts, enough to keep a demanding laptop running with a single cable. It charges from the grid with the same USB-C cable, or from the sun or the car's cigarette lighter socket through a second input, which the two uses share without being able to add together. The top handle is also the USB-C charging cable, one less accessory to carry separately; an adjustable shoulder strap mounts on the same fittings, sold separately.

It's the right choice for anyone traveling light, for the day or on a trip, who needs to keep small devices charged without carrying a charger for each one. It isn't suited to anyone counting on an AC outlet when the power goes out: here, there simply isn't one.

01 · Verified data

Technical specifications

Cell chemistry LFP (lithium iron phosphate)

Cost per kWh 829,86 €/kWh

official manufacturer list price — on nominal capacity

Round-trip efficiency Jackery does not state it.

where we looked

Standby consumption Jackery does not state it.

where we looked

Parameter	Value	Source
Weight	2.5 kg (5.5 lb)	manufacturer website
Nominal capacity	0.288 kWh	Declared by the brand
Cell chemistry	LFP (lithium iron phosphate)	Declared by the brand
AC outlets	0	Declared by the brand
Fastest USB-C	140 W	Declared by the brand
Maximum charge power	0.14 kW	Declared by the brand
Maximum solar input	100 W	Declared by the brand
Rated cycles	4000 cicli	Declared by the brand
Capacity at end of cycle life	70 %	Declared by the brand
Warranty	3 anni	Declared by the brand
Mounting	Portable	Declared by the brand
Official list price	239 €	Declared by the brand
Usable capacity	—	Not declared
Depth of discharge	—	Not declared
Cell supplier	—	Not declared
Expandable	—	Not declared
Maximum expanded capacity	—	Not declared
Continuous output	—	Not declared
Peak output	—	Not declared
Peak duration	—	Not declared
0–80% charge time	—	Not declared
Backup power	—	Not declared
Switchover time	—	Not declared
Guaranteed throughput	—	Not declared
Guaranteed remaining capacity	—	Not declared
Round-trip efficiency	—	Not declared
Standby consumption	—	Not declared
Ingress protection	—	Not declared
Minimum temperature	—	Not declared
Maximum temperature	—	Not declared
Cell heating	—	Not declared
Noise level	—	Not declared
Wheels and handle	—	Not declared
Works without internet	—	Not declared
Local control	—	Not declared
Open protocols	—	Not declared
Home Assistant integration	—	Not declared
Where the data is hosted	—	Not declared
Remote updates	—	Not declared
App required for setup	—	Not declared
Declared standards	—	Not declared

Which documents this page rests on

USER MANUAL Jackery Explorer 300D 38 rows of the table · file hosted on cdn.shopify.com

The rest of the data comes from one page on the manufacturer's site, cited row by row in the table above.

A manual or a datasheet counts as a source even when the original file is hosted elsewhere: what matters is the document, not the server. Where that happens, it is stated above.

02 · The numbers

What it really costs

Cost per kWh 829.860 €/kWh official manufacturer list price — on nominal capacity

How we worked it out

price: 239
nominal capacity: 0.288

Battery life cycles 1095 cycles warranty years

the manufacturer does not state the guaranteed total energy throughput, which for heavy users is often the limit that runs out first

How we worked it out

stated cycles: 4000
warranty years: 1095

Cost of stored energy 0.758 €/kWh warranty years

the manufacturer does not state the guaranteed total energy throughput, which for heavy users is often the limit that runs out first
on nominal capacity: the manufacturer does not state the usable figure, so the real cost is higher
without conversion losses, which the manufacturer does not state: the real cost is higher

How we worked it out

price: 239
nominal capacity: 0.288
battery life cycles: 1095
round-trip efficiency: 100
energy delivered over the whole life: 315

Energy density 115.200 Wh/kg

on nominal capacity: the manufacturer does not state the usable figure, so the true number is lower

How we worked it out

nominal capacity: 0.288
weight: 2.500

These numbers are calculated, not stated: they have no source to cite, they have a formula you can redo. The price used is the manufacturer's list price, which is stable and the same in every country — not a shop's price on the day.

03 · Summary

Pros and cons

In favour

The main USB-C port reaches a hundred forty watts: the same cable fills it up and powers the laptop.
Three USB-C ports: phone, tablet and laptop charge together, without choosing which one goes without. source
The top handle is also the USB-C charging cable: one less accessory to carry separately. source

Worth knowing

It has no AC outlet at all: it only powers USB and 12 V devices, not a plug-in appliance. source
Solar charging goes through a separate input, not the USB-C port: the right connector is needed to connect the panel.
Full warranty depends on registering the product online; without it, only the base three years remain.

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