Sanyo 20700B

BlueSwordM said:

They're actually 4200mAh 15A cells, so you've found something beautiful.
And, no the ones used in the Tesla Model 3 is the 2170. No one except Tesla uses these.



Also, 10 cells in a drill pack? How the heck? That's the first time I've so many cells inside a single pack.

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DarkRaven said:

I have completely shiny and new Sanyo 20700B at home, they would probably be great for a picture if need be.

This was a recent model of battery then apparently. Powertool companies started their transition to 20700 cells not so long ago. Bosch just launched their 2nd generation of batteries with 20700 cells. There were rumors, or maybe it was even planned at some point, that Tesla will use 20700 cells as well but they have indeed opted for 21700 since then. And there were rumors that the 2nd generation of the new Bosch batteries will use 21700 as well, but they "still" use 20700

10 cells in a power tool battery is very common, actually most of the 18V/20V batteries are 5S2P with 10 cells by now and have been for quite a while.

Power tool battery history if you are interested:
It started with 1.3Ah and 1.5Ah cells. This was 10+ years ago and by todays standard the resulting 18V batteries are merely a toy.
The companies then started to use 2P configurations to provide more power for their tools. The result were 2.6Ah and 3.0Ah batteries. Since then most batteries came in 2P configuration. With availability of better cells we got 4.0, 5.0 and 6.0Ah batteries and so on.
And occasionally the single layer batteries (the term single and dual layer is often used instead of 1P/2P) got upgraded with new cells, but not always. For example, Bosch doesn't have a single layer 3.0Ah battery I think, but they use the 3.0Ah cells in the 6.0Ah battery (but they do use 3S1P 3.0Ah setups for the 10.8/12V system).
Only recently they started making a single layer battery again with the 20700 cells and 3.5Ah. Due to the load resistance of these cells they claim this is the first time they are able to do that again because power tools got much mor epowerful over time. There will also be 5S2P again with 7.0Ah and also 5S3P with 10.5Ah. While 2P is very common, 3P isn't. It existed before, but it really was a rare sight. I think DeWalt and Milwaukee did 18650-based 3P batteries before. These were already pretty big, in German we would say they are an "Oschi". It's colloquial for something that is impressive due to its size in relation to the normal sized version and doesn't translate very well in a single word
You can imagine that the 5S3P batteries with 20700 cells are even bigger, many people hope that these batteries announce the upcoming arrival of stationary battery powered tools. Something that customers are asking from Bosch for quite a while. Bosch claims 500, 1000 and 1500W from the single, dual and triple layer batteries so these are really badass monsters.

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