Looking for an Conext CNB900 battery? Then you've come to the right place. We have been selling batteries for Conext CNB900 UPSs online since 2003 and will have the correct battery for your UPS in stock, available for next day delivery. Use our Conext CNB900 battery guide below to find a suggested battery for your UPS and compare it to the battery fitted to your CNB900. Need help? Simply contact us.