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First i would like to thank @Seba for giving me the idea and sharing his knowledge without which I would not have thought of this project. Check out his thread first: Decided not to go this route after the news of adjustable chargers going rogue and killing several 16x wheels with 100v++ despite being set to 84v. Felt more comfortable using my tested and proven GT16 chargers which are decently fast and never get hot. You can use any charger for this mod, just install the right connectors for your adapter/meter. For those who might attempt this: Mains voltage is dangerous, even more so when combined with mislabelled chinese components. My GT16 pinouts were completely reversed despite what the sticker read, and the Lenovo plug was wired backwards from what is used on the KS-16x. CHECK ALL POLARITIES WITH A MULTIMETER! Do not recommend the first half of this project for the inexperienced DIYers. It's much more worth it safety wise to just buy a chargedoctor off ebay or a ready-made meter/adapter from a trustworthy source. So much could have gone wrong Parts used: Lenovo male cable for 16x https://s.click.aliexpress.com/e/SGpXCDJXH GX16-3 female socket for GT16 chargers https://s.click.aliexpress.com/e/dz4VdU8Rt Coulometer https://s.click.aliexpress.com/e/qh7dWjVcX GT16 Charger (or whatever you like) This setup gives me 3 options: 5.5a fast charge, 84v, 100% 2.7a slow charge, 82v, 90% 2.7a slow charge, 84v, 100% I forgot to document the assembly of my coulometer as the mislabelled markings were pissing me off and giving me a headache. The next part onwards is relatively safe and easy to attempt. The GT16 charger has only one tamper-resistant triangle screw hidden under a sticker Trimpot was hidden under a glob of silicone probably to prevent tampering as well. Peel it off carefully. The dial is fragile and can be yanked off easily. Keep a close eye on the meter and turn very slowly and gently until you reach your intended voltage. My charger only had one trimpot which makes things simpler. However, note that many chargers have 3 according to Seba. Check his thread to make sure you do not adjust the wrong one if you have one of those. 82.5v: close enough for me. Put everything back together and its done! Now I can charge to 90% - my daily use option, or 100% for balancing once a month, or fast charge at 5.5A which is always nice to have when in a hurry.