ⓘ PR Times Japan

Tama Denshi Kogyo is a Kawasaki accessory maker that has been around since 1976. The company is now putting semi-solid-state cells into six new power banks, and they go on sale in Japan today. It is a small launch from a company most readers outside Japan will not know. However, it is launching in the middle of an industry shift; more on that later.

There are three capacities, each in black and white. The 10,000 mAh TLP158UC pushes up to 45 W over USB-C and costs 7,980 yen (~$50). The 15,000 mAh TLP159UC and 20,000 mAh TLP160UC both climb to 67 W, at 10,800 (~$68) and 12,800 yen (~$80). All three come with a captive USB-C cable alongside a USB-C port and a USB-A port, a charge-level readout, and over-current and over-voltage protection.

Total output collapses to 30 W once more than one connection is drawing power. The 67 W figure that makes the larger two credible for a laptop only applies when nothing else is plugged in. Charging three devices at once, as the company suggests, means sharing 30 W between them.

The battery itself uses a flame-retardant gel in place of the usual liquid electrolyte. Tamadenco claims reduced fire risk, roughly 2,000 cycles, and steady output in heat and cold. It's worth noting that semi-solid is not solid-state. There is still liquid in the cell, and Japan is targeting practical all-solid batteries around 2030.

About that industry shift we talked about earlier; the timing is not accidental. Elecom shipped a comparable 10,000 mAh unit in March at 8,480 yen, and Japan banned in-flight power bank use on April 24 after the country logged 123 battery-related accidents in 2024. Sales will be held through electronics chains, home centres and Tamadenco's own store. No word on any release beyond Japan.

Anubhav Sharma - Senior Tech Writer - 1895 articles published on Notebookcheck since 2024

Most of my time goes into writing - and somehow it hasn’t stopped being fun yet. My work mainly revolves around everyday tech, gaming, watches, DIY modding, and the occasional piece on tech-policy chaos when companies and governments clash. I try to keep things simple and honest, without sounding like a product brochure. I have a Bachelor’s degree in Computer Science Engineering and an Associate Degree in English Studies from the College of New Caledonia in British Columbia, Canada. Away from articles and deadlines, life usually shifts to making music, taking photos, or trying to finish games that should have been completed months ago.