A123 12V MODULE with 4 26650 ANR26650M1-B LIFEPO4

 Here are great packs to salvage 4 26650 A123 cells in 4s1p configuration. These are the M1B cells which are the newer version. We tested a lot of these and they usually test very well. These packs have not been heavily used. The BMS is proprietary but should be good for those who salvage circuit boards because medical batteries tend to have a lot of gold plating. Maybe you can figure out the BMS to reuse it but it seems it needs to read something to activate on the 3rd and 4th wires. These packs are actually made with 3m solution for cooling that is immersive and non-conductive. Very cool battery packs. You can crack the seam of the plastic to open them. Cell specs are below. Just $1.25 per cell for the best lifepo4 cells on the market. These actually are $800 batteries made by Hall which is a crazy price - model L3000LG. Just $5.99 here at Battery Hookup. 

https://www.esutures.com/product/0-in-date/53-conmed/101-miscellaneous/46296328-conmed-hall-large-lithium-battery-13.2v-L3000LG/

ANR26650M1-B Specifications
 Nominal Ratings
  Voltage: 3.3 Volts
  Capacity: 2.5 Ah
  Energy: 8.25 Wh
  Specific Power: 2600 W/kg
  Impedance (1KHz AC Typical) 6 mΩ
  Cycle Life at 1C/1C, 100% DOD: > 4000 cycles
  Cell Type: 26650 Lithium Ion Power Cylindrical Cell

 Discharging
  Max Continuous Discharage: 50 A
  Max Pulse Discharge Current >50% SOC (10s): 120 A
  Minimum Voltage: 2 Volts
  Temperature: -30ºC to 55ºC

 Charging
  Recommended Standard Charge: 2.5 Amps
  Max Charge Rate: 10 Amps
  Max Pulse Charge Current <50% SOC (10s): 25 A
  Float Voltage: 3.45 Volts
  Recommended charge V & Cut-off Current: 3.6 Volts, taper to 125mA
  Temperature
    (reduce charging current to 250mA when under 0ºC): 0ºC to 55ºC

 Mechanical
  Diameter: Ø25.96 +/- 0.5 mm
  Length: 65.15 +/- 0.5 mm
  Mass: 76 g

 Certifications
  Transportation: UN 3480 (UN38.3), CIQ
  Safety: UL 1642, IEC 62133