Evolving Mobile Batteries and Growing Safety Concerns
Mobile batteries have advanced in parallel with smartphones, focusing on higher output, larger capacity, and more compact designs. However, this performance enhancement has also brought to light concerns regarding safety. Recent reports of mobile battery fires have led many users to feel uneasy in various situations, such as:
-
Carrying them in bags with other items.
-
Accidentally dropping them during handling.
-
Using them in crowded, confined spaces like public transportation (buses, trains, airplanes).
In response to these challenges, the company has pursued new safety standards for mobile batteries, leading to the development of products utilizing all-solid-state batteries.
Traditional mobile batteries commonly use liquid electrolytes, which are flammable and inherently pose safety challenges. In contrast, the all-solid-state batteries adopted in this series reduce liquid content to less than 1%, fundamentally redesigning safety. This structural approach helps suppress the occurrence of internal short circuits, which can lead to thermal runaway, and exhibits high resistance to the growth and penetration of lithium dendrites. This product series aims to offer the pinnacle of safety in mobile batteries, allowing users to charge devices without the anxiety of fire risks. This is noted as an industry first as of February 2026, based on research conducted by the company.
Verified Safety
The company emphasizes providing objective verification of the safety offered by these products in daily life. Comparative tests, including nail penetration, drop, and load tests, were conducted to clearly differentiate them from conventional mobile batteries. These tests confirmed the safety against external impacts and pressure.
PF8 (8,000mAh)

The PF8 is a compact model supporting both magnetic wireless charging and cable charging simultaneously for up to two devices. Despite its large capacity, it features a business card-sized design, allowing it to be attached to compatible smartphones for stable charging on the go. It offers up to 15W for wireless charging and PD20W for cable charging. A 20cm USB-C to USB-C cable is included, making it ready for immediate use.

PF8 Product Specifications
-
Battery Type: Lithium-ion all-solid-state battery
-
Battery Capacity: 8,000mAh (30.4Wh/3.8V)
-
Liquid Content: <1%
-
USB-C Rated Output: 20W (5V/3A, 9V/2.22A, 12V/1.67A)
-
USB-C Rated Input: 18W (5V/3A, 9V/2A)
-
Wireless Charging: 5W/7.5W/10W/15W
-
Battery Level Indicator: LED indicator
-
Protection Functions: Input overvoltage protection, output overcurrent protection, short circuit protection, battery overcharge, battery discharge protection, battery overcurrent protection, IC overheating protection, charge/discharge battery temperature, NTC protection
-
Weight: Approx. 170g
-
Body Size: Approx. 100×65×14mm
-
Case Material: Aluminum + PC + ABS
-
Operating Temperature: -20 to +55℃
-
Charging Temperature: 0 to +55℃
-
Storage Temperature: -20 to +55℃
-
Included Items: Main unit, USB-C to USB-C cable (20cm), instruction manual, warranty card
PF10 (10,000mAh) and PF20 (20,000mAh)

The PF10 and PF20 models feature two built-in USB-C charging cables on their rear. This design eliminates concerns about forgetting cables, allowing for immediate charging whenever needed. Despite their large capacities, they offer excellent portability, providing strong support for daily and on-the-go charging. Furthermore, by using optional cables in conjunction with the built-in cables, these models support simultaneous charging of up to four devices, offering high convenience in situations where multiple smartphones or devices need to be charged at once.

PF10 Product Specifications
-
Battery Type: Lithium-ion all-solid-state battery
-
Battery Capacity: 10,000mAh (37Wh/3.7V)
-
Liquid Content: <1%
-
USB-A Rated Output: 5V/3A, 9V/2A, 10V/2.25A, 12V/1.67A
-
USB-C1 Rated Output: 5V/3A, 9V/2.22A, 12V/1.67A
-
USB-C2 Rated Output: 5V/3A, 9V/2.22A, 12V/1.67A
-
USB-C3 Rated Output: 5V/2.4A
-
USB-C1 Rated Input: 5V/3A, 9V/2A, 12V/1.5A
-
Battery Level Indicator: Digital display (%)
-
Body Size: Approx. 148×69×18mm
-
Weight: Approx. 230g
-
Protection Functions: Input overvoltage protection, output overcurrent protection, short circuit protection, battery overcharge, battery discharge protection, battery overcurrent protection, IC overheating protection, charge/discharge battery temperature, NTC protection
-
Case Material: PC + ABS
-
Operating Temperature: -20 to +55℃
-
Charging Temperature: 0 to +55℃
-
Storage Temperature: -20 to +55℃
-
Included Items: Main unit, instruction manual, warranty card
PF20 Product Specifications
-
Battery Type: Lithium-ion all-solid-state battery
-
Battery Capacity: 20,000mAh (74Wh/3.7V)
-
Liquid Content: <1%
-
USB-A Rated Output: 5V/3A, 9V/2A, 10V/2.25A, 12V/1.67A
-
USB-C1 Rated Output: 5V/3A, 9V/2.22A, 12V/1.67A
-
USB-C2 Rated Output: 5V/3A, 9V/2.22A, 12V/1.67A
-
USB-C3 Rated Output: 5V/2.4A
-
USB-C1 Rated Input: 5V/3A, 9V/2A, 12V/1.5A
-
Battery Level Indicator: Digital display (%)
-
Body Size: Approx. 148×69×30mm
-
Weight: Approx. 390g
-
Protection Functions: Input overvoltage protection, output overcurrent protection, short circuit protection, battery overcharge, battery discharge protection, battery overcurrent protection, IC overheating protection, charge/discharge battery temperature, NTC protection
-
Case Material: PC + ABS
-
Operating Temperature: -20 to +55℃
-
Charging Temperature: 0 to +55℃
-
Storage Temperature: -20 to +55℃
-
Included Items: Main unit, instruction manual, warranty card
Availability
The new mobile battery series is scheduled for release on Friday, March 6, 2026.
It will be available for purchase at:
-
Kurashi no e-shop
-
Yamazen Bizcom
-
Amazon
-
National home centers
-
TV shopping channels
Model Specifications and Pricing
| Model | Capacity | Color | Suggested Retail Price (incl. tax) |
|---|---|---|---|
| PF8 | 8,000mAh | White/Black/Pastel Blue | 7,980 yen |
| PF10 | 10,000mAh | Pearl White | 8,980 yen |
| PF20 | 20,000mAh | Pearl White | 9,980 yen |
For more information about Bigblue Tech Corporation, please visit their official website: https://www.ibigblue.co.jp
