Interstate SLA1116 12V 18Ah AGM Battery Pair

This listing is for two Interstate SLA1116 sealed AGM batteries, each rated at 12 volts and 18 amp-hours. The product information identifies the model for both cyclic and standby applications. These are individual batteries sold as a pair, not a single prewired pack: the equipment determines how the pair is connected and what system voltage it requires.

Confirm the Replacement Before Ordering

Start with the labels on the batteries currently installed and the equipment manufacturer's manual. Check that SLA1116 is the specified model or an approved replacement, and verify the required quantity, chemistry, voltage and capacity. Two batteries can share a nominal voltage while differing in dimensions, terminal arrangement or charging requirements. A connector that looks close is not enough to establish compatibility.

Understand the Pair and Its Ratings

The 12V and 18Ah ratings apply to each battery. They should not be added together and presented as the equipment's system voltage or usable capacity; that depends on the device's wiring and operating requirements. When the equipment uses two batteries as a matched set, replacing them together with the same model avoids mixing different battery ages or specifications. Follow the manufacturer's directions for replacement and wiring rather than changing the original arrangement.

Check Terminals and Charging

Terminal details can vary among battery models, so inspect the existing connection style and orientation and compare them with the replacement. Confirm that the equipment's charger is approved for the battery chemistry and configuration. Do not select a charger solely by voltage or assume that an existing lead will fit. If the manual, battery labels or wiring layout do not clearly match, have the device manufacturer or a qualified service provider confirm the correct replacement before installation.