Add external battery capacity to an XPC M90S UPS configuration with the CUSTOM 90001262 battery module. The assembly contains two battery sleeves, each populated with eight 12 V batteries, giving the module a total of 16 batteries. An integrated battery breaker provides a dedicated disconnecting point for the module battery assembly. This module fits XPC M90S UPS capacity configurations that require battery support alongside one or more power modules. The stated configuration requires a minimum of one battery module for every power module used for capacity. That relationship matters when sizing an installation: each added power module must have corresponding battery-module support. The module is supplied as a populated battery assembly rather than as individual replacement batteries. Its two-sleeve layout keeps the battery set grouped within one external UPS component, while the included breaker forms part of the module assembly. Select this component when the requirement is an XPC M90S-compatible battery module with 16 installed 12 V batteries and a battery breaker.