12v 4s 30a Lifepo4 BMS - Series Capable 12/24/36/48v Toshiba If you are testing a

If you are testing a lithium ion battery you will notice the discharge curve is more angled compared to lifepo4 which tends to hold a steady curve near nominal voltage

Maintenance: Keep the device clean and free of debris

The negative wire is missing

They all have been working flawlessly for years

12v 4s 30a Lifepo4 BMS - Series Capable 12/24/36/48v Toshiba If you are testing aThese BMS units were recovered from medical batteries. They are one of the highest quality 4s lifepo4 30a BMS units you will find. They can also handle 80 amps for up to 30 seconds. Since they have upgraded mosfets they can be series connected up to 48v. Fully charged 14. 6v Fully discharged 10v Max continuous charge 20a Max continuous discharge 30a 30 second pulse discharge 80a Dimensions 6 5 8" x 2 3 4" x 7 8" As you can see in the 3rd photo the B