Proper Voltage, Inc.
Proper Voltage is the digital bridge that seamlessly links power and product, opening up access to more choices and possibilities.
Funding history
About Proper Voltage, Inc.
How much funding has Proper Voltage, Inc. raised?
Proper Voltage, Inc. has raised $25.0M in total funding. The most recent round was Series A.
Where is Proper Voltage, Inc. headquartered?
Proper Voltage, Inc. is headquartered in Carlsbad, CA.
What does Proper Voltage, Inc. do?
Proper Voltage is the digital bridge that seamlessly links power and product, opening up access to more choices and possibilities.
What problem does Proper Voltage, Inc. solve?
Product manufacturers have long been locked into a handful of rigid battery chemistries, forcing costly redesigns or recertification whenever they want to adopt better battery technology.
What's Proper Voltage, Inc.'s solution?
Proper Voltage provides a "control layer"/software platform (the Battery Operating System, or bOS) that acts as a universal adapter between battery chemistries and product power systems, letting manufacturers integrate advanced batteries without redesigning their products.
What makes Proper Voltage, Inc. different?
Their bOS platform is framed as chemistry-agnostic ("free of chemistry constraints") and software-driven, with named partner testimonials from Toshiba and Unigrid crediting it for unlocking their battery chemistry's performance and market adoption without custom formats or long integration cycles.
What makes Proper Voltage, Inc. notable?
Proper Voltage, formerly known as ZapBatt, was co-founded by Charlie Welch and David Felzer in Carlsbad, CA, and has raised about $28.6M including backing from Commonweal Ventures.
Leadership
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Free to use in articles, research, and reference works. Stable URL, will not change. Data on this page last updated August 26, 2026.