eMark

"The sitting position is optimized bit by bit: the back muscles are active, the shoulders fall forward in a relaxed manner, the back and...

595mm version of that handlebar sounds appealing as an ergonomics upgrade, i think that deserves to be on the parts list. Wow they...

If your charges range from 3amp to 5amp then 4-5 years. If charges are from 2amp to 3amp then a $95 charger should last beyond 5 years...

As has been stated in previous threads it could take "days" (if even then) to balance even a 10s battery with p-groups having deviation...

And sometimes it's a loosing battle, but still a valuable learning experience when time allows so you aren't rushed and frustrated My...

Is this battery several years old with hundreds of cycles? It may be nearing its End-Of-Life with lowest p-group at 3.6v while 4 oher...

Just because they were built the same(?) doesn't guarantee they are still the same. For example having to replace on of the parallel...

Were each of the twenty parallel groups (72V = 20s) the same increase in voltage? Just because there was an increase proceeding along...

Can see why it might seem easier measuring the 5p group voltages with the BMS connected and laying flat/secure to stabilize while taking...

First objective was to determine the voltages of the thirteen 5p groups using the BMS connector (not the BMS). See 1st paragraph of...

Did you previously remove the protective wrap from one or all of the three batteries for checking BMS, cells, etc after posting your...

CAUTION: To prevent a short by probes accidentally touching each other while taking parallel group voltage readings. Keep the negative...

Take voltage readings of each parallel group to see which groups are close to the same voltage and which ones are suspect. You can do...

Samsung 25R (2500mAh) is the most popular (20amp rating) name brand reasonably priced 2500mAh cell (green wrap). Your pink wrap cells...

Best guess at this point is a bad cell (or parallel group of cells) that trips the BMS and shuts down. BTW - How often do you balance...