I purchased a 2013 Ford Fusion Energi 15 months ago with 23,000 miles on it. There are now 36,000 miles on the car. Battery capacity at full charge was 20-21 miles for the first year, but has gone down to 14-15 miles in the last few months. I live in Central California with a mild climate - winter low temps in 30's overnight, summer highs average high 70's to low 80's with occasional 90-100 days. I understand that battery capacity can be affected by driving habits, use of AC/heater, etc, but I feel that those issues are not the cause in my case. I have read several of the threads dealing with the HVB degradation issues and am wondering if that is the cause. A bit of detail about my usage. I work from home and take several short (under 10mile) trips per day. I plug in after each trip and unplug when I go on the next trip. Usually the battery is not fully discharged at the end of each trip and usually the battery does get to 100% charge for each subsequent trip. I use a 240v charger. I have a few questions that I hope someone can help me with. 1. Should the HVB be fully discharged before charging again? 2. Should the plug be removed once charged to 100%? 3. Should the HVB only be charged to about 85% capacity at each charging, rather than 100%? 4. If the decrease in the battery capacity that I am experiencing is due to normal battery degradation, is there anything the dealer will be able to do to increase the capacity? 5. Should I expect that the degradation should level off and stay relatively the same for the remainder of the life of the battery? 6. How many miles do these batteries typically last? 7. Any suggestions on how to increase battery capacity and prolong the battery life? Thank you! JS
