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I'm trying to repair a soap dispenser: https://www.simplehuman.com/products/foam-sensor-pump

I opened it up and found the battery was damaged, and I wanted to see if I could replace it. Before I opened it up, I was trying to find a product with the wiring already there. I was able to find batteries with the same specs, but nothing with wires already attached. Will I be able to build a battery myself by like taping wires to either end of a battery? It's unclear what's inside of the blue plastic wrapping

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    \$\begingroup\$ It's a cylindrical cell Lithium-Polymer (or Lithium-Ion -- the terms mostly mean the same thing). You should be able to find something with wires attached, and then splice your connector on (assuming that the connector isn't the problem -- that looks pretty dirty). \$\endgroup\$
    – TimWescott
    Apr 14, 2021 at 0:51
  • \$\begingroup\$ Unfortunately I can't seem to find something with wires attached, it seems to be a pretty ubiquitous battery, but i'm not sure how to query for it with wires attached, any thoughts? i've tried "IR14500 3.7v battery with wires" \$\endgroup\$
    – A O
    Apr 14, 2021 at 1:14
  • \$\begingroup\$ Try searching on "cylindrical cell", then get one with the same dimensions. \$\endgroup\$
    – TimWescott
    Apr 14, 2021 at 1:48
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    \$\begingroup\$ Cut open the plastic around it. From your photo it looks like there may be a BMS under there. There may also be additional markings on the battery itself to reveal what battery chemistry it is based on. \$\endgroup\$
    – KristoferA
    Apr 14, 2021 at 3:58

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The battery seems like a knock-off part since the part number does not match manufacturer's part number. The connector is likely JST PHR-02 and battery seems to be Great Power LIR18650. Adafruit seems to sell an equivalent assembly as #1781 link.

Related link on soldering wires to lithium batteries link

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  • \$\begingroup\$ amazing!! thank you! lol i think i'll avoid soldering wires based on steps 1,2 and 3 on that stackexchange post \$\endgroup\$
    – A O
    Apr 14, 2021 at 1:19
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    \$\begingroup\$ I do not think this is an 18650 size cell. Based on the number on the cell wrapper and the cell capacity, it looks to be a 14500 size cell. Similar in size to a standard "AA" cell. \$\endgroup\$ Aug 30, 2021 at 17:01

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