DIY Guide to Replace Device brand Battery Cells

Duration: 45 minutes
Steps: 2 Steps

Let’s dive into identifying those pesky dead cells in battery packs and give them a much-needed replacement! Just a heads-up, though—this guide is a bit on the experimental side. Remember, Li-Ion cells can pose fire, explosion, or burn risks, so this guide is purely for educational purposes. Always ensure you’re wearing the right PPE and working in a suitable environment. And if you find yourself needing a hand, don’t hesitate to schedule a repair!

Step 1

– So, here’s the deal with our battery pack: it’s made up of individual cells linked together in either parallel or series configurations. Each cell has its own voltage and capacity, and when combined, they create the overall voltage and capacity of the entire battery pack.

– In this case, we’re looking at a 3s2p battery pack, which means there are 3 blocks connected in series, with each block containing 2 cells working in parallel.

– Now, the leftmost block seems to be taking a permanent vacation, as it reads a steady 0 volts on my trusty multimeter.

– On the bright side, the other two blocks are showing around 3.6 V, which means they’re still alive and kicking! Awesome!

– I haven’t checked the individual cells in those two working blocks yet, and there’s a good reason for that. This battery pack has been sitting around for a few months, and if just one cell in a block is dead, the healthy one would have drained itself trying to keep the other alive (which is probably what happened in that dead block).

Tools Used
  1. Multimeter

Step 2

– I’ve got two scrap 18650 cells from an old, tired battery pack. They’re still holding a charge, but no worries! The battery’s electronics will work their magic and balance those charge levels in no time.

– Once you’ve wrapped this up, just reassemble the pack and everything should be good to go!

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