Accessible Power Bank

Hi everyone, we’re a small accessibility-focused team from Hong Kong working on more affordable Braille displays and tactile hardware for blind and low-vision users. Our company started in 2023,and over the past couple of years we’ve mostly been focused on affordable and muliti-line Braille displays and portable tactile devices. So far, our products have been used by thousands of users across 8 countries. I am the Market Research Lead of our company.
If you want to know more about us, here’s our website:
https://s.wujieqh.com/
While testing some of our tactile modules, a few blind users mentioned something interesting to us:
“I don't know the remaining battery level of my power bank. I have one that indicates the battery level through voice, but when I am in the library, its voice really makes me feel embarrassed. And I can hardly hear the voice clearly on noisy enviroment like subway or party. Can you add your braille moudle into the power bank so I can know the battery level by the braille or some kind of tactile feedback”
That comment honestly stuck with us. So we decided to try this. In fact, we have already built a small demo prototype. On, by the way, there are two blind people in our team.
Right now the demo includes:
• Simple raised indicators (4 tactile dots representing battery level, each rising point represents 25% of the remaining battery)
• Voice battery percentage announcements
• 10,000mAh battery
• 22.5W fast charging
• Portable size similar to a standard iPhone 16
• 1 USB-A interface, 1 type-c interface
The tactile indicator comes from some of our Braille hardware technology, but we simplified it for quick battery checking instead of reading text.
That said, we still feel the design needs a lot of improvement, and before moving further we’d really like honest feedback from blind and low-vision users.
We’d like to invite around 10 people from the community to test the current prototype and share direct, honest thoughts with us. If selected, we’ll mail the demo to you. We’re only asking for a symbolic $1 payment because we won’t be asking for the prototype back afterward.
If you’d like to participate, here’s the short survey:https://forms.gle/w5QLeXKXwDNpjnku9

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The survey is anonymous, encrypted, and takes less than 3 minutes to complete.
We’re not building mailing lists, sending ads, or using anyone’s information for marketing. The survey is only for accessibility research and early product testing.
You’re also completely welcome to use a nickname instead of your real name if you prefer.
And if you don’t want to fill out the form, feel free to just reply here with your thoughts or suggestions.
Our team includes both engineers and blind users, and honestly, most of the ideas we’ve had so far came from conversations with blind people themselves. We know a lot of accessibility products get designed without enough real blind-user input, and we’re genuinely trying to avoid making that mistake.
Thanks so much for reading, and we’d truly appreciate any thoughts, criticism, or suggestions.