matt Posted May 14, 2019 Share Posted May 14, 2019 The old cells are long gone, totally not usable. I know I'm not limited to the 18650s, but they're the cheapest for given capacity. I'll do some reading now. Quote Link to comment Share on other sites More sharing options...
matt Posted June 26, 2019 Share Posted June 26, 2019 (edited) It's been a while. I ended up buying 64 SAMSUNG INR18650-35E (3500mAh, 8A according to specs) and had them spot welded for me. They don't fit the original casing, but I wasn't going to use it anyway. I measured the pack and it was about 63 V. And here comes the bad thing. After reconnecting the pack the Zero started to jiggle like crazy and make a loud noise, like when grinding ice cubes in a meat grinder or something. When I lifted it, it turned off, the usual way, I guess. I really regret buying the Zero. I had it second hand, almost unused, and the original 32-cell pack got broken very quickly. I measured individual cells after disassembling it. If I remember correctly about 10 of them were about 0 V, and most of the rest about 4 V. Any ideas? Edited June 26, 2019 by matt Quote Link to comment Share on other sites More sharing options...
matt Posted June 27, 2019 Share Posted June 27, 2019 Problem solved! Thank you for your numerous comments and hints, but I managed to figure it out myself. It was due to too little mass. Being turned on with just part of the original casing and with the new battery standing on the floor, so not adding mass, the levelling system could not work normally. After mounting a heavy object on one of the pedals for a trial, everything returned to normal. I just need to make my own casing now. Quote Link to comment Share on other sites More sharing options...
shawnjohn909 Posted May 1, 2022 Share Posted May 1, 2022 Hi everyone I got this IPS t350 unicycle And I am trying to locate or find out what type of battery charger do I need? There is a 4 pin male connector on the top And from what I researched I think I have the 32 of the Sony 18650 batteries Quote Link to comment Share on other sites More sharing options...
Chriull Posted May 1, 2022 Share Posted May 1, 2022 3 hours ago, shawnjohn909 said: Hi everyone I got this IPS t350 unicycle And I am trying to locate or find out what type of battery charger do I need? There is a 4 pin male connector on the top And from what I researched I think I have the 32 of the Sony 18650 batteries This could be an 16s2p configuration? so 67.2V max charge voltage and about roughly up to some ~2A charge current? But most likely money for a charger is lost money - the batteries are very likely dead by now as this is an very antique wheel. If it does not power on anymore batteries are dead with some >99.99% chance I don't have any idea about the used plugs fron the IPS - could be the same as Kingsong and Gotway used? "Aviation connector Gx 16-4"? Quote Link to comment Share on other sites More sharing options...
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