Our WF-8900-REP converter replacement kit allows easy upgrade of existing power centers. Now, the WF-8900-AD-REP Series, includes an industry first, Patent Pending Auto-Detect technology. This new microprocessor driven technology will recognize lithium ion and lead acid battery chemistries and automatically adjust the charging profile to match the battery type. No more buttons. No more switches. RV owners will have the peace of mind that their batteries will be accurately charged, eliminating the risk of over and under charging.Additionally, with multi-stage charging and current monitoring in both lead acid and lithium profiles, battery life will be maximized.