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Hisun Sector E1 Discovery to Lithium Conversion. So I went ahead and did the conversion using the LiTime 4-pack 48V 30Ah GC2 which I ordered on Amazon Prime Day for $1840 ($460/battery). Also bought the LiTime 58.4V 18A ($200) Lithium Battery Charge and “Superboni” 7pc set #2 Awg HD Golf Cart Battery Club Car 48 Wire Kit ($56). I utilized the LiTime charger to activate the Bluetooth and charge each battery to full. Then, connected them all in parallel and allowed them to balance both internal cells of each battery and between batteries which took several hours. Removed all the old Discovery batteries which as stated before requires the removal of the front panel under the seating and is much easier if you disconnect the piston allowing the rear bed to open fully. Placed the 4 new batteries in the most interior positions and had to utilize the braces from the exterior positions because the H-brace from the interior positions overlapped the battery terminals on the new batteries. Be sure to position the batteries so the original connections can reach which for me was positioning the negative terminal on both posterior batteries towards the rear. I connected the batteries in parallel for balanced but not perfectly balanced charging/discharge because it would require connections crossing over the controller sitting between the left and right battery positions. Basically, the connections followed a “U” pattern around the controller. I used this webpage to help wire the batteries: https://www.solar-electric.com/lib/wind-sun/Iota_balanced_charging.pdf I reprogrammed the Delta-Q charger to profile #233 charging to 56V as previously mentioned by Jaime since I read it is not recommended to utilize the max charge voltage which would have been profile #386 charging to 58.4V. https://support.delta-q.com/hc/en-us/articles/14188856858893-Choosing-an-Algorithm-for-a-Lithium-Battery How to upload new profiles: https://support.delta-q.com/hc/en-us/articles/360015622531-IC-Series-How-to-reprogram-reflash-or-upgrade-software-and-algorithms-via-USB How to change charger profile: https://support.delta-q.com/hc/en-us/articles/360016475772-Changing-Algorithms-on-IC-Series-Chargers Download profiles here: https://support.delta-q.com/hc/en-us/articles/360015622311-Download-Algorithms-for-IC-Series-Chargers Put everything back together and took it for a test run. Everything appeared to function properly and certainly has more power. I am using the battery Bluetooth with the LiTime App to monitor the batteries individually and the App has a feature that allows you to monitor all 4 batteries as a system. I was able to see that the batteries did charge on the Delta Q charger as well. It’s been less than a week, so I will update if anything changes, but overall for less than $2100 + tax/shipping(free since I have Amazon Prime), I’m very happy with the conversion. Hope this helps anyone else thinking of making the leap to Lithium.