PowerTube 500/625

They have the same BMS. BMS swapping is possible and easy - more difficult if from 500 to 625 or vice versa.

There are four T15 screws on each end. On the bottom end, two of them are covered by as plastic plate, that needs to be removed. It is held on by three hex screws. The indicator board's button is just sticked to the metal tube, it can be easily peeled off. Then the plastic end caps can be pulled off, and the pack pushed out of the metal tube.  Altogether easy to open.

No recell, but BMS swap is OK, indicator fix is OK

We cannot do recells on these, because:

• The sense-and-balance wire harness is a flex harness that is spot welded to special tabs on the cell modules
• The steel rods that hold the levels together are bent to hold them together, hard to undo and redo

Out of the 11 units tested:

• 2 good cells and bad BMS
• 6 had bad cells and bad BMS
• 2 was in moderate deep discharge, they could be charged up, and the BMSs were good
• 1 so bad cells that it couldn't be charged up -  but potentially good BMS!

It is possible to test these batteries on our bicycle with an adapter.

To open:

• Take out the 8 T20 screws
• Gently pry off the bottom cover (that has no plug on it)
• Even more gently pry off the button
• Use a wood piece to press out the battery from the alu case
  • No need to press it out 100% - you make your life easier if you don't!

BMS w/ burned chip