MATECH launches 20,000mAh semi-solid-state power bank with 45W USB-C output
In short
Japanese accessory maker MATECH released the PowerCube 20000 45W (semi-solid-state battery model), a 20,000mAh power bank using its SemiCore semi-solid battery. It costs 9,990 yen, and Amazon.co.jp is offering 20% back in points, worth 1,998 points, until October 11. The company says it is among the world's smallest power banks above 20,000mAh, with single-port USB-C output of up to 45W.
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MATECH released the PowerCube 20000 45W (semi-solid-state battery model), a 20,000mAh power bank priced at 9,990 yen, the company's launch was reported by Japanese tech outlets. Amazon.co.jp is offering 20% back in points, worth 1,998 points, until October 11, according to the reports. [ 1 , 2 , 3 ]
The device uses MATECH's SemiCore semi-solid battery, which the company says uses a gel electrolyte and is designed to limit the spread of heat in abnormal conditions and reduce the risk of thermal runaway and ignition compared with conventional lithium-ion cells that use liquid electrolyte. According to the reports, only cells that passed the company's own safety tests — including nail penetration, crushing, heating, external short circuit and overcharging — are used. [ 2 , 3 ]
A single USB-C port delivers up to 45W, enough for smartphones, tablets and laptops such as the MacBook Air, according to the reports; above a certain temperature a safety function limits output to 30W. The unit has two USB-C ports and one USB-A port, the latter with a maximum output of 22.5W, and can charge up to three devices at once, with total output capped at 20W when multiple ports are in use. A digital display shows remaining battery capacity in numbers. [ 2 , 3 ]
The body measures about 87.4×64.5×31.8mm and weighs about 316g. MATECH says it is among the world's smallest power banks with a capacity of 20,000mAh or more, a claim the reports attribute to the company without independent confirmation. [ 2 , 3 ]
Why it matters
The launch is one of the more visible consumer releases to use a semi-solid battery, a chemistry MATECH says is designed to reduce thermal runaway and fire risk compared with conventional lithium-ion cells. The Amazon point promotion through October 11 indicates the device is being positioned for mainstream online retail in Japan. The documents do not give sales targets, wider availability or independent test results.
Key facts
- MATECH released the PowerCube 20000 45W (semi-solid-state battery model) power bank on October 6. [ 2 , 3 ]
- The price is 9,990 yen, and Amazon.co.jp offers 20% back in points — 1,998 points — until October 11. [ 1 , 2 , 3 ]
- The battery capacity is 20,000mAh and uses MATECH's SemiCore semi-solid battery with a gel electrolyte. [ 1 , 2 , 3 ]
- A single USB-C port outputs up to 45W, reduced to 30W by a safety function above a certain temperature. [ 2 , 3 ]
- The unit has two USB-C ports and one USB-A port, for up to three devices at once, with 20W total output when several ports are used together. [ 2 , 3 ]
- The body measures about 87.4×64.5×31.8mm and weighs about 316g; MATECH says it is among the world's smallest power banks of 20,000mAh or more. [ 2 , 3 ]
- The cells used passed the company's own safety tests, including nail penetration, crushing, heating, external short circuit and overcharging. [ 2 , 3 ]
Confirmed by several sources
- MATECH released the PowerCube 20000 45W semi-solid-state battery model, priced at 9,990 yen. [ 1 , 2 , 3 ]
- Amazon.co.jp is offering 20% back in points, worth 1,998 points, until October 11. [ 1 , 2 , 3 ]
- The power bank has a 20,000mAh capacity and uses MATECH's SemiCore semi-solid battery. [ 1 , 2 , 3 ]
- The maximum single-port USB-C output is 45W. [ 2 , 3 ]
- The device has two USB-C ports and one USB-A port and can charge up to three devices simultaneously. [ 2 , 3 ]
- The body is about 87.4×64.5×31.8mm and about 316g. [ 2 , 3 ]
Still unclear
- MATECH says the product is among the world's smallest power banks of 20,000mAh or more. The size ranking is the company's own claim and is attributed as such; the documents give no independent verification.
- The cells are said to have passed the company's own safety tests, including nail penetration, crushing, heating, external short circuit and overcharging. The tests are described as MATECH's own (同社独自) and no third-party certification is cited.
- Availability beyond Amazon.co.jp is not stated. All three documents mention only the Amazon.co.jp point promotion; distribution elsewhere is not described.
What local media are saying
Timeline, local time
- ITmedia reports the PowerCube 20000 semi-solid-state battery model is on sale at 9,990 yen, with 20% points back on Amazon.co.jp until October 11. [ 1 ]
- Keitai Watch publishes full specifications, including 45W single-port USB-C output and about 316g weight. [ 2 ]
- PC Watch reports MATECH released the device on October 6 and repeats the 9,990 yen price and point campaign. [ 3 ]