UL 1989 Certification

UL 1989 certification provides third-party verification of battery safety and performance requirements for sealed lead acid batteries. The CDC400-6 is certified to UL 1989, the Underwriters Laboratories standard covering electrical performance, mechanical integrity, and safety requirements including overcharge tolerance and short circuit protection. Certification is issued following independent third-party laboratory evaluation — not manufacturer self-declaration.

Canbat maintains UL 1989 certification across its sealed lead acid battery lineup, including the CDC deep cycle series.

Carbon AGM-GEL Deep Cycle Construction

The CDC400-6 6V 400Ah L16 Deep Cycle AGM Battery uses advanced carbon-enhanced AGM-GEL construction engineered for extended deep-discharge cycling. The addition of carbon to the negative plate improves charge acceptance and reduces sulfation under partial state-of-charge conditions, while the AGM-GEL electrolyte system delivers stronger cycle performance than standard general-purpose AGM batteries. This combination makes the CDC400-6 particularly well-suited to demanding cyclic duty in renewable energy battery banks, off-grid power systems, and solar energy storage.

The sealed, valve-regulated, non-spillable design eliminates the watering and acid spills associated with flooded L16 batteries while greatly reducing routine gassing under normal operating conditions, and permits installation in any orientation. Unlike flooded deep cycle batteries that require regular electrolyte maintenance, the CDC400-6 is completely maintenance-free, with a self-discharge rate below 2% per month allowing storage up to six months before a refresh charge is required.

Cycle Life & Depth of Discharge

The CDC400-6 6V 400Ah L16 Deep Cycle AGM Battery is engineered for extended deep-discharge cycling, with cycle performance dependent on depth of discharge, charging profile, operating temperature, and maintenance practices. The carbon AGM-GEL construction delivers higher cycle life than standard general-purpose AGM batteries, particularly at shallower discharge depths — operating at 30% depth of discharge (DoD) delivers substantially more cycles than operation at 100% DoD.