HidrateSpark PRO LED Bluetooth Sensor Puck Rechargeable Battery Replacement

ID: 157346

Description:

Steps:

  1. Ensure your puck is not fully charged. Preferably, do this when your puck is discharged and your smart bottle ask you for recharge
  2. Unscrew Bluetooth Sensor Puck from your bottle (obviously)
  3. Remove three Philips 1 screws and place them somewhere where you will not accidentally loose.
  4. You will have to put a bit of a force to remove those screws, rotate your screwdriver counterclockwise. When done, all screws will fall out of a puck, when you rotate it upside down and give a bit of shake.
  5. You might want to use your thumb when shaking those screws out of your puck to avoid premature separation of its lid in process
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  6. Now, when you've removed those screws, you can easily pop the lid of your puck
  7. There are no latches nor adhesive to hold the lid.
  8. The battery is located on the lid, but the cable is long enough for you to open a puck safely without breaking them.
  9. The battery cable itself has a small white connector.
  10. Disconnect battery cable by holding a puck (side with motherboard) in one hand and pulling white connector using the other hand. No tweezers necessary here, use your fingernails and grab the upper part of a connector, which has small bumps on both left and right side for that purpose.
  11. Do not pull that connector by red and black cables, you may break those
  12. If you can't pull out the battery connector, try doing so again by adding a small left-right shake of your hand when pulling up. This will connector's grip a bit.
  13. Be careful not to bend small pogo-pins in process, those are responsible for delivery power from external magnetic connector to the board, so you could charge the device
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  14. The battery is held in place by one piece of double-sided tape and has a cardboard piece attached to its top in a same way, probably for additional insulation
  15. Use something plastic to remove the battery, or cut the adhesive using dental floss.
  16. Be careful not to puncture the battery
  17. Battery inside consists of two lithium-ion 3.7v batteries taped together. Overall capacity is 420 mAh or 1.55 Wh, and size is around 10x12x30mm
  18. The battery compartment is slightly bigger than the battery itself, so you may use a new battery of slightly bigger dimensions.
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  19. I haven't seen any battery with this connector available, so you will have to do a bit of soldering
  20. Mind the polarity of battery connector. Note that the red wire should be on outer side of the puck, while the black one in the inner side.
  21. Messing with polarity may force you to replace this puck entierly and the new one costs 48$
  22. After you connect a new battery, your puck will flash a few times, this is expected
  23. You will have to recalibrate the sensor puck after full reassembly. In fact, the application on your phone will remind you of this.
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  24. An original 3.7V battery consists of two batteries stitched together in parallel and a protection board
  25. Protection board itself has two chips:
  26. 8205A — a Dual N-Channel MOSFET
  27. DW01A — a "lifetime" battery protection IC (over-charge, over-discharge, over-current). Funny, the datasheet on this states that it is designed for a single cell, but we do see that here it is connected to two of them. I presume this has implications on a life time in the long run.
  28. The battery leads are not welded, they're soldered — so you can detach the BMS board from cells easily by clipping out the leads first, to avoid any possibility of short-circuit, heating those leftovers a bit and pushing them to side. Thus you wll have a clean spot to solder a new battery leads to.
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  29. I was not able to find the exact match by size and capacity
  30. Any 3.7V Li-Ion/Li-Pol battery you can fit will work.
  31. You can use a few smaller batteries like the original did.
  32. You can use a smaller battery, or a bigger battery like I did
  33. Use a replacement battery only if it has a protection board. I have no idea if a puck PCB has any kind of protection circuit built in. Better safe than sorry.
  34. I ended up using a rechargeable 3.7V battery from a disposable vape (Elfbar 800).
  35. This battery did not fit the puck case without modification, thus, I had to remove some plastics that held the original battery in place
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