14x 3.7v 2980mah 11.03Wh Cells with BMS - $50/kWh

These batteries have all been removed from overstock or customer returned Amazon tablets. The BMS is a 2a BMS and it connects to a ribbon cable. You can always solder your connection right to the BMS pads or remove the BMS and make your connections to the cells tabs. Since this is a ribbon cable coming off the BMS I would recommend just soldering right to the BMS blocks where the tabs are connected already. Super easy to build packs with these. All you need is a little soldering iron and some wires. The backs likely will have some "wrinkly" appearance because they were double side taped down but the cells are super sturdy, no swelling at all, and we've tested hundreds of these and they test amazing. Most of these have never been cycled or only cycled a few times.

Of course we always recommend using a BMS on all battery packs. If you make a higher voltage battery out of these and find a way to connect to the ribbon connectors you should always use an overall pack BMS. These BMS units would work great as smart cell level fuses.

These sell for $11 per battery on Ebay. Model ST18 for the Amazon Fire tablets. You are getting 14 of them. Just 57 cents each for 2890mah cells.

Dimensions: 3 3/8" x 3 3/4" x 1/8"