I have a Lift battery that was given to me as the original owner said Lift sent them a new battery because the charger couldn’t detect the battery pack. Their same charger works on the new battery Lift sent them.
The contact leads show 5V currently (I believe positive on the left, negative on the right?). Obviously not the 14S 58V it’s suppose to be. If I hookup a 14S charger, any idea what might happen!? 
Super curious if I can restore this thing back to life.
Hi.
Score. It’s probably just a bad BMS.
The cells might be low, but they can probably be recovered. I’d say open it up. Remove the BMS. Balance charge the cells. If it all checks out then modify the pack for no BMS like my battery builds. Voltage alarm during use and externally balanced during charging. You can just add a charging wire to the center cell and this will allow you to charge the single 14s14p battery as two 7s14p batteries with a iChargerX8.
Good luck!
Yes, the BMS/controller combo is quite proprietary at this point and replacing the cells is not an easy task.
Right on.
@tylerclark Please feel free to contact me directly and I will be happy to walk you through it. You can also go the bluetooth BMS route like me and use it for for charging/monitoring/balancing and bypass it for discharging.
I have a lift efoil battery that wont charge and needs repair. Im located in south florida USA. In need of someone that has some knowledge on how to be able to fix these batteries.
Thank You
Alex M
I just recently opened a second one, with better success. The first one I wasn’t persistent enough around the handle and I broke the lid.On the first one the glue that is on top the cells to secure the temp sensors was also stuck to the lid and as I pealed back the lid it pulled off the soldered battery contacts in those places, not ideal. A little heat in those spots will help loosen the glue.This one I managed to open with a metal 3 in one tool and a hammer along the seam, the handle part was the hardest but I got it off intact without damaging anything. I then had the BMS from the first one which was a new battery that got damaged in shipping and swapped it in the second one that I successfully opened and it fixed it. The second battery one day stopped lighting up and charging. Charger displayed a E209 fault(Lift said that means the charger didn’t detect a battery). This fault occurred after the Lift Efoil was used untill the low battery came up on the remote and then not charged for a few days, long story short somehow the BMS stopped working. Same thing happened to someone I know who stored their battery at 25% for a couple weeks, can’t say that the two experiences are related, but seems to me that the BMS inside the battery gets damaged if the pack voltage gets too low.
Good job! Looks like they have a Kilovac there, can you see wat specs it has?
I already glued it back up. I don’t have that info unfortunately
Thanks. Looks like this model : https://www.te.com/usa-en/product-2203194-1.html Rated for surprisingly low amp but the rating is maybe conservative?
Nice work! What method did you use to split those cases?
Just used a 3 in one multi tool/scraper and a small hammer. They are visible in the first pic
Really interesting to see inside !
Are the 2 platic parts glued together with some kind of Sikaflex / glue ?
I still have my Onean battery to cut open guys ! Hopefully I am back to it this weekend and can share this journey. Also I need to reply to the other post as well 
So each cell is individually fused, looking at the nickel plate, right?
Dear Slacks, there are such battery packs I also have to repair the bms fall does not work, how to get them? The factory doesn’t answer anything for me. Honorable for your advice and help. I attach a picture of the work and am happy to exchange information. Thanks Ripacs!
[quote=“Ripacs, post:133, topic:10490, full:true”]
Great battery pack ! Can you measure the thickness of the plastic on the cover ?
Thank you !
