What it is
The Yoshino B660 SST is a well-designed and attractive Power Bank that boasts a few unique and interesting features. Perhaps the most exciting is the use of Solid State battery technology. Solid State batteries are fairly new in the consumer market, and promise several benefits, primarily reduced weight and increased safety.
At 602 wHr of capacity, the B660 SST fills a nice hole in most manufacturer’s battery bank lineups, with a bit more capacity than the typical 500 wHr bank, and less size, weight, and capacity than a larger 1000 wHr unit. All the key outputs are on the front of the unit, along with a simply display that provides all the data you’d want on a power bank, including current power draw, percent capacity remaining, and an estimated time until the pack runs out of juice.
Unique among power banks I’ve tested, the B660 SST not only provides USB-C output, but also allows the power bank to be charged through USB-C. This means that you can use your laptop power brick to charge the B660 SST, so you can still charge the device should you misplace the power brick, or not want to carry a single-use device on a trip.
Yoshino also wins the Big Heavy award for most useful light on a power bank. Rather than useless flashlight-style spotlights, the B660 SST has an attractive LED light bar that not only looks good, but actually illuminates the work area in front of the pack and the output ports, the area you’d actually want to see if trying to use a power bank in a dark environment.
High-quality materials, and all the accessories you’d need to get started are also included, making this a compelling package.
Who it’s For
The B660 SST is a well-designed, attractive, and theoretically safer power bank. A 602 wHr of capacity, it’s a nice size for powering a family’s-worth of devices over a weekend camping trip or power outage, or providing a half-day of backup power to a fridge or larger device.
The thoughtful design of the outputs, high-quality materials, and reduced weight from the solid state batteries make this bank a winner, and the ability to use the USB-C chargers you already own is icing on the cake.
- NEW SOLID-STATE TECHNOLOGY – Solid-State Technology (SST), is the evolution in lithium batteries which are safer, more compact/lighter than its conventional lithium-ion counterparts. New solid-state battery provides safer & compact power output for off-grid and recreation use.
- POWER AND CAPACITY – 660 watts continuous (920 peak watts) power and a capacity of 602Wh provides power for devices and small appliances. Safety features include over voltage, over current, over charging, over discharging, thermal, and short circuit protection. The SST battery is rated to 2,500 cycles to 80% (7 years of everyday use), and Yoshino’s U.S. based support is here to assist with any service needs.
- POWER ON THE GO – Whether you are out on an adventure, tailgating, or in the middle of an emergency, this portable power station weighs only 17.2 lbs. and provides a great source of power. Featuring a built-in aluminum carry handle and mobile app for remote access – connecting via Wi-Fi or Bluetooth. Quiet with zero gas emissions and harmful fumes, keeping you connected, always.
- 4 WAYS TO RECHARGE – The B660 SST can be recharged using DC via AC adaptor (charges from 0-100% within 5 hours), optional solar charging (8 hours), car charging (5 hours), and USB-C PD (6 hours).
Pros & Cons
Heavy
Solid-State Battery Technology
One of the first consumer-level products with Solid State batteries, this technology promises lighter weight and additional safety.
Thoughtful Design
Everything from high-quality materials, to a complete selection of accessories speaks to how well this power bank is designed.
Best Light Yet
It might seem like a superfluous concern, but you’re probably going to be using your power bank at night in a campsite or during a power outage. A light that’s actually useful is a major benefit in these situations.
Lightweight
Flaky App
Like many power banks, Yoshino provides an app to control the B660 SST. Despite multiple attempts, I could never get the app to connect my B660 to my WiFi network.
Average Charge Speed
It takes a bit over 4 hours to charge the pack to 80%, and things slow down from there. Faster charging would have been nice.
Weak Inverter
The inverter, which provides AC power, maxes out at 660W, so the bank won’t power hungry devices like coffee makers, hot plates, or power tools.
Specs and Features
602 wHr Capacity
16.9 lbs / 7.7 kg
AC Outputs
3 120 VAC Outlets with 660W Max Output
DC Outputs
2 x 5521 12V/10A DC Outputs
USB Outputs
2 x USB-A 5VDC/2.4A
2 x USB-C, 100W Power Delivery
Included Accessories
Wall Charger (aka power brick), 12V Car charging cable, MC4 Solar adapter, 12V automotive to 5521 adapter
