NinebotPTRELITE+

One BMS moved over to the new cells without a hitch. The second kept reporting 14.40 Volts which was the remaining voltage in the old cells before I recharged blocks of 6 cells (3S2P) using an automotive trickle charger (12V, 2A). I did keep all the cells that came back to 4.2 V and trashed the ones that would not recover. A couple did swell, but no fire or explosions! Despite being disconnected from cells and wired to all new cells, the second BMS reported the same 14.40V. It finally reset after unplugging the main connector on the board and replugging. Why that would be any different than having all the leads unsoldered I do not know, but came back reporting 62.6V which was what I had hoped for? The russian on eBay does have the correct BMS units for the elite at $75 plus shipping.

Thanks for input. No success as yet.

Had an old android phone with 4.4.2 and Ninebot V4.2.0. Tried connecting to both apps to get Battery app to connect to Bluetooth, but still no success. Do want to thank you for your post and suggestions. Was certainly worth a try.

Had an old android phone with 4.4.2 and Ninebot V4.2.0. Tried connecting to both apps to get Battery app to connect to Bluetooth, but still no success. Do want to thank you for your post and suggestions. Was certainly worth a try.

If this is a PTR Elite try bluetooth re-pairing. Pairing a Keyfob Tools Required: Phillips-head screwdriver Paperclip Procedure 1. Make sure the PTR is powered off and the charger is not connected. 2. Using a Phillips-head screwdriver, remove the righthand screw on the charge port 3. Insert a paperclip or similar tool into the hole that the screw came out of. 4. Momentarily press the button at the bottom of the hole. NOTE You should see a red light in the hole. 5. Press the Power Button on the keyfob. NOTE You should see the red light blink four times. 6. Test the newly-paired keyfob by using it to turn the PTR on and off. 7. Reinstall the fastener.

HOW sweet! . I would be glad to offer pointers as needed when the time comes. I only risk losing body parts for my own projects

Had been searching for modestly priced rebuilt packs in the US with no success. Finally ended up doing a pack rebuild on my own. Found the exact OEM 18650 LG Cells out of Korea for $230USD for the 60 cells. Pure nickel stripping and cell holders cost another $30, but was able to reuse the original 15S2P BMS's which both reset nicely. I already had the spot welder. The "new" LG cells were from a 2016 mfg batch and equally charged at 3.7Volt give or take .04 I have been running the pack for six weeks now. Working like a new pack - of course it almost is new! Just here to say that rebuilding a Ninebot battery pack can be done by "carefully" following guidance found online and Youtube. Learn from other people's mistakes and successes. I did have someone standing by with fire extinguisher and I wore gloves, eye protection and full face shield while working with the packs. Spot welding batteries can go smoothly and easy until IT DOES NOT! I had no problems , but took my time and checked and double checked polarity, wiring positions, placement BEFORE every weld. I will rebuild all my packs from now on, but will try to maintain the same "sense of danger " as I did doing the first pack.

Tried NINEBattery app with my Ninebot PTR Elite+ but says "BLE not connected". Tried turning bluetooth on/off, but with no success. Website says that it should work with any Ninebot. Any ideas out there.

Thanks for your thoughts. Finally ended up doing a pack rebuild. Found the exact OEM 18650 LG Cells out of Korea for $230USD for the 60 cells. Pure nickel stripping cost another $30, but was able to reuse the original 15S2P BMS's which both reset nicely. I already had the spot welder. The cells were from a 2016 mfg batch, but new and equally charged. Working like a new pack - of course it almost is new! I am anxious to try out the new NINEBattery app. Will reveal any potential problems with my other battery packs.

Been using three Ninebot PTR Elite + 's for over two years on a daily basis. Great devices and have been very reliable.. One of my PTRs is starting to overcharge on one side of the battery pack, so I assume I will be doing a battery pack replacement in the coming future. Has Anyone found a reliable China source for replacement packs? Anyone try the Russian pack rebuilders or locate reliable rebuilder in the US? I am concerned that local US sources are selling packs that have been setting in stock rooms or warehouses for years.