Li-ion soon to be price competitive with FLA?
I was recently browsing around in an electronics store and saw one of those portable battery packs for charging iPhones/iPads that had a 10,000 mAh capacity for $20. If I'm doing my math correctly tha...
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The highest capacity 18650 cells are Panasonics at 3600Mah, as far as I know, And you will be lucky to find a single cell for less than 15$
The claimed capacity of cells sold, go well into the ridiculous category. Many of the cells sold are rewrapped laptop cells.
I've harvested 18 laptop 18650 cells 2 of those were bad, the rest have usable capacity left. New they might have been 2100mAH. I'm lucky to get 875mAH from them when using a single cell to recharge my Phone, or Bluetooth speaker, but there are inefficiencies involved.
While my harvested laptop battery cells can take my phone from 15 to 85% or so before the battery cannot support 4.75+ converted volts, my Panasonic NCR18650b cells can take my phone from 5% to 100% nearly 1& 2/3 times.
A pair of Panny NCR18650Bs runs about 22$ minimum. I buy a 9 cell laptop replacement battery for about the same, but the cells are junk, in comparison.
I think the 18650 cells are the highest energy density cells currently available to the general public. I thought Tesla is using a few hundred 18650 cells in series parallel for their battery packs, but will not put money on this.
The claimed capacity of cells sold, go well into the ridiculous category. Many of the cells sold are rewrapped laptop cells.
I've harvested 18 laptop 18650 cells 2 of those were bad, the rest have usable capacity left. New they might have been 2100mAH. I'm lucky to get 875mAH from them when using a single cell to recharge my Phone, or Bluetooth speaker, but there are inefficiencies involved.
While my harvested laptop battery cells can take my phone from 15 to 85% or so before the battery cannot support 4.75+ converted volts, my Panasonic NCR18650b cells can take my phone from 5% to 100% nearly 1& 2/3 times.
A pair of Panny NCR18650Bs runs about 22$ minimum. I buy a 9 cell laptop replacement battery for about the same, but the cells are junk, in comparison.
I think the 18650 cells are the highest energy density cells currently available to the general public. I thought Tesla is using a few hundred 18650 cells in series parallel for their battery packs, but will not put money on this.
