The drop-in lead-acid replacement.
A compact, modular static battery system built on Cayrex's Hyperflow platform — designed to challenge conventional lead-acid batteries.
About the APC Battery project
The APC battery is a compact, modular static battery system developed by Cayrex, designed to challenge conventional lead-acid batteries. Built on the foundation of Cayrex's proprietary Hyperflow technology, the APC battery delivers good performance while maintaining the familiar form factor that industry and consumers rely on. The APC battery is strategically positioned between lead-acid and lithium batteries — offering significantly better cycle life, safety, and upgradability than lead-acid systems, at a price point currently comparable to AGM lead-acid batteries.
Unlike conventional batteries where the entire unit must be replaced when performance degrades, the APC battery can be upgraded or refreshed simply by replacing the electrolyte — a concept inherited from the Hyperflow platform that makes it uniquely future-proof. The APC battery comes with a zinc-bromine (Zn-Br) based electrolyte as its default chemistry. However, because it inherits the Hyperflow platform's universal cell architecture, users can opt for alternative zinc-based chemistries — including Zn-Mn, Zn-I, and Zn-Fe — based on their specific requirements, without any modifications to the battery hardware.
Built differently from the start.
Store for years — fully discharged
Lead-acid, lithium-ion and sodium-ion batteries all suffer from calendar aging — their capacity and performance degrade over time even when unused. APC can be fully discharged and stored for years without degradation.
Safe, zinc-based chemistry
Water-based zinc electrolyte is non-flammable and non-explosive — no thermal runaway, no toxic fumes. Zinc is abundant and ethically sourced, with no lithium, cobalt, or nickel supply concerns.
Upgradeable by electrolyte swap
The APC battery is built around two cell architectures — NCD (Neutral Cell Design) and FCD (Fixed Cell Design). With NCD cells, the battery can be refreshed or upgraded simply by replacing the electrolyte, no cell modifications needed. With FCD cells, upgrades are performed by replacing the cells themselves for higher capacity and power. Either way, the entire unit doesn't need to be replaced.
Multi-chemistry compatibility
One hardware platform, multiple electrolyte options — Zn-Br, Zn-Mn, Zn-I, Zn-Fe — without any modifications to the battery.
Long cycle life
Significantly more charge-discharge cycles than lead-acid systems, lowering total cost of ownership over the battery's lifetime.
Recyclable & sustainable
The used electrolyte can be recycled and reformulated for new production. Cell components are simple and easy to recover at end of life.
Built on Hyperflow
Inherits all the platform advantages of the Hyperflow technology in a compact, static form factor — without pumps, external tanks, or moving parts.
Two distinct cell architectures.
The APC battery is designed to accommodate two distinct cell architectures, allowing customers to choose the configuration that best matches their application requirements, performance needs, and budget.
Neutral Cell Design Architecture
The NCD architecture represents the simpler, more cost-effective approach. Cells are constructed with minimal components, making them extremely easy to manufacture and recycle. Any upgrade or chemistry change is accomplished purely by replacing the electrolyte — no cell modifications needed.
Fixed Cell Design Architecture
The FCD architecture delivers higher capacity and power output than NCD. Upgrades are performed by replacing the cells themselves rather than just the electrolyte, offering greater performance potential at the cost of slightly more complex manufacturing.
Suitable wherever lead-acid is used.
The Hyperflow APC battery thus supports a wide range of applications and is suitable for almost any use where lead-acid batteries are currently used — from small to medium-sized energy storage systems, emergency and backup power, telecom and UPS infrastructure, to mobile solutions including marine, automotive, and DIY energy projects.
Replacing the lead-acid stack.
Telecom operators, UPS integrators, system installers — APC is the compact, static version of our Hyperflow technology, designed as a drop-in replacement for lead-acid batteries.